Rename cpu_fbatches->activate to cpu_fbatches->lru_activate, and its
handler folio_activate_fn() to lru_activate() so that all the boilerplate
can be removed at the end of this series.
This adds support for pre-trained zstd dictionaries [1]
Dictionary is setup in params once (per-comp) and loaded
to Cctx and Dctx by reference, so we don't allocate extra
memory.
Support pre-trained dictionary param. Just like lz4,
lz4hc doesn't mandate specific format of the dictionary
and zstd --train can be used to train a dictionary for
lz4, according to [1].
Support pre-trained dictionary param. lz4 doesn't
mandate specific format of the dictionary and even
zstd --train can be used to train a dictionary for
lz4, according to [1].
zram: move immutable comp params away from per-CPU context
Immutable params never change once comp has been allocated
and setup, so we don't need to store multiple copies of
them in each per-CPU backend context. Move those to
per-comp zcomp_params and pass it to backends callbacks
for requests execution. Basically, this means parameters
sharing between different contexts.
Also introduce two new backends callbacks: setup_params()
and release_params(). First, we need to validate params
in a driver-specific way; second, driver may want to
allocate its specific representation of the params which
is needed to execute requests.
Link: https://lkml.kernel.org/r/20240712051850.484318-20-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Nick Terrell <terrelln@fb.com> Cc: Nitin Gupta <ngupta@vflare.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Keep run-time driver data (scratch buffers, etc.) in
zcomp_ctx structure. This structure is allocated per-CPU
because drivers (backends) need to modify its content
during requests execution.
We will split mutable and immutable driver data, this is
a preparation path.
Link: https://lkml.kernel.org/r/20240712051850.484318-19-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Nick Terrell <terrelln@fb.com> Cc: Nitin Gupta <ngupta@vflare.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Previously comp_algorithm device attr would accept only
algorithm name param, however in order to enabled comp
configuration we need to extend comp_algorithm_store()
with param=value support.
Link: https://lkml.kernel.org/r/20240712051850.484318-16-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Nick Terrell <terrelln@fb.com> Cc: Nitin Gupta <ngupta@vflare.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
zram works with PAGE_SIZE buffers, so we always know exact
size of the source buffer and hence can pass estimated_src_size
to zstd_get_params().
This hint on x86_64, for example, reduces the size of the work
memory buffer from 1303520 bytes down to 90080 bytes. Given that
compression streams are per-CPU that's quite some memory saving.
Link: https://lkml.kernel.org/r/20240712051850.484318-10-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Minchan Kim <minchan@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Nick Terrell <terrelln@fb.com> Cc: Nitin Gupta <ngupta@vflare.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
lib: zstd: fix null-deref in ZSTD_createCDict_advanced2()
ZSTD_createCDict_advanced2() must ensure that
ZSTD_createCDict_advanced_internal() has successfully
allocated cdict. customMalloc() may be called under
low memory condition and may be unable to allocate
workspace for cdict.
Link: https://lkml.kernel.org/r/20240712051850.484318-4-senozhatsky@chromium.org Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Nick Terrell <terrelln@fb.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Nitin Gupta <ngupta@vflare.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
lib: zstd: export API needed for dictionary support
Patch series "zram: introduce custom comp backends API", v6.
This series introduces support for run-time compression algorithms tuning,
so users, for instance, can adjust compression/acceleration levels and
provide pre-trained compression/decompression dictionaries which certain
algorithms support.
At this point we stop supporting (old/deprecated) comp API. We may add
new acomp API support in the future, but before that zram needs to undergo
some major rework (we are not ready for async compression).
Zi Yan [Wed, 24 Jul 2024 13:01:15 +0000 (09:01 -0400)]
memory tiering: count PGPROMOTE_SUCCESS when mem tiering is enabled.
memory tiering can be enabled/disabled at runtime and
sysctl_numa_balancing_mode & NUMA_BALANCING_MEMORY_TIERING is used to
check it. In migrate_misplaced_folio(), the check is missing when
PGPROMOTE_SUCCESS is incremented. Add the missing check.
Link: https://lkml.kernel.org/r/20240724130115.793641-4-ziy@nvidia.com Fixes: 33024536bafd ("memory tiering: hot page selection with hint page fault latency") Reported-by: Kefeng Wang <wangkefeng.wang@huawei.com> Closes: https://lore.kernel.org/linux-mm/f4ae2c9c-fe40-4807-bdb2-64cf2d716c1a@huawei.com/ Signed-off-by: Zi Yan <ziy@nvidia.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
If memory tiering mode is on and a folio is not in the top tier memory,
folio's cpupid field is repurposed to store page access time. Instead of
an open coded check, use a function to encapsulate the check.
Link: https://lkml.kernel.org/r/20240724130115.793641-3-ziy@nvidia.com Signed-off-by: Zi Yan <ziy@nvidia.com> Reviewed-by: "Huang, Ying" <ying.huang@intel.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Zi Yan [Wed, 24 Jul 2024 13:01:13 +0000 (09:01 -0400)]
memory tiering: read last_cpupid correctly in do_huge_pmd_numa_page()
Patch series "Various memory tiering fixes", v3.
This patch (of 3):
last_cpupid is only available when memory tiering is off or the folio is
in toptier node. Complete the check to read last_cpupid when it is
available.
Before the fix, the default last_cpupid will be used even if memory
tiering mode is turned off at runtime instead of the actual value. This
can prevent task_numa_fault() from getting right numa fault stats, but
should not cause any crash. User might see performance changes after the
fix.
Link: https://lkml.kernel.org/r/20240724130115.793641-1-ziy@nvidia.com Link: https://lkml.kernel.org/r/20240724130115.793641-2-ziy@nvidia.com Fixes: 33024536bafd ("memory tiering: hot page selection with hint page fault latency") Signed-off-by: Zi Yan <ziy@nvidia.com> Reported-by: David Hildenbrand <david@redhat.com> Closes: https://lore.kernel.org/linux-mm/9af34a6b-ca56-4a64-8aa6-ade65f109288@redhat.com/ Reviewed-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Barry Song [Wed, 24 Jul 2024 02:00:56 +0000 (14:00 +1200)]
mm: extend 'usage' parameter so that cluster_swap_free_nr() can be reused
Extend a usage parameter so that cluster_swap_free_nr() can be reused by
both swapcache_clear() and swap_free(). __swap_entry_free() is quite
similar but more tricky as it requires the return value of
__swap_entry_free_locked() which cluster_swap_free_nr() doesn't support.
Link: https://lkml.kernel.org/r/20240724020056.65838-1-21cnbao@gmail.com Signed-off-by: Barry Song <v-songbaohua@oppo.com> Reviewed-by: Ryan Roberts <ryan.roberts@arm.com> Acked-by: Chris Li <chrisl@kernel.org> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Kairui Song <kasong@tencent.com> Cc: David Hildenbrand <david@redhat.com> Cc: Chuanhua Han <hanchuanhua@oppo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Josef Bacik [Thu, 18 Jul 2024 21:26:07 +0000 (17:26 -0400)]
mm: remove foll_flags in __get_user_pages
Now that we're not passing around a pointer to the flags, there's no
reason to have an extra variable for the gup_flags, simply pass the
gup_flags directly everywhere.
Josef Bacik [Thu, 18 Jul 2024 21:26:06 +0000 (17:26 -0400)]
mm: cleanup flags usage in faultin_page
Patch series "mm: some small page fault cleanups".
I was recently wreaking havoc in the page fault code and I noticed some
things that could be cleaned up. We no longer modify the gup flags in
faultin_page, so we can clean up how we pass the flags in and remove the
extra variable in __get_user_pages.
This patch (of 2):
We're passing a pointer to the foll_flags for faultin_page, however we
never modify the flags in this call. Change this to just take the flags
value instead.
mm/damon/lru_sort: adjust local variable to dynamic allocation
When KASAN is enabled and built with clang:
mm/damon/lru_sort.c:199:12: error: stack frame size (2328) exceeds
limit (2048) in 'damon_lru_sort_apply_parameters' [-Werror,-Wframe-larger-than]
static int damon_lru_sort_apply_parameters(void)
^
1 error generated.
This is because damon_lru_sort_quota contains a large array, and
assigning this variable to a local variable causes a large amount of
stack space to be occupied.
mm/hugetlb_vmemmap: don't synchronize_rcu() without HVO
hugetlb_vmemmap_optimize_folio() and hugetlb_vmemmap_restore_folio() are
wrappers meant to be called regardless of whether HVO is enabled.
Therefore, they should not call synchronize_rcu(). Otherwise, it
regresses use cases not enabling HVO.
So move synchronize_rcu() to __hugetlb_vmemmap_optimize_folio() and
__hugetlb_vmemmap_restore_folio(), and call it once for each batch of
folios when HVO is enabled.
Link: https://lkml.kernel.org/r/20240719042503.2752316-1-yuzhao@google.com Fixes: bd225530a4c7 ("mm/hugetlb_vmemmap: fix race with speculative PFN walkers") Signed-off-by: Yu Zhao <yuzhao@google.com> Reported-by: kernel test robot <oliver.sang@intel.com> Closes: https://lore.kernel.org/oe-lkp/202407091001.1250ad4a-oliver.sang@intel.com Reported-by: Janosch Frank <frankja@linux.ibm.com> Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com> Acked-by: Muchun Song <muchun.song@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/78656.1720853990@turing-police Fixes: e93d4166b40a ("mm: memcg: put cgroup v1-specific code under a config option") Signed-off-by: Valdis Kletnieks <valdis.kletnieks@vt.edu> Acked-by: Roman Gushchin <roman.gushchin@linux.dev> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Muchun Song <muchun.song@linux.dev> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Baolin Wang [Mon, 22 Jul 2024 05:43:19 +0000 (13:43 +0800)]
mm: shmem: move shmem_huge_global_enabled() into shmem_allowable_huge_orders()
Move shmem_huge_global_enabled() into shmem_allowable_huge_orders(), so
that shmem_allowable_huge_orders() can also help to find the allowable
huge orders for tmpfs. Moreover the shmem_huge_global_enabled() can
become static. While we are at it, passing the vma instead of mm for
shmem_huge_global_enabled() makes code cleaner.
No functional changes.
Link: https://lkml.kernel.org/r/8e825146bb29ee1a1c7bd64d2968ff3e19be7815.1721626645.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Reviewed-by: Ryan Roberts <ryan.roberts@arm.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Barry Song <21cnbao@gmail.com> Cc: Hugh Dickins <hughd@google.com> Cc: Lance Yang <ioworker0@gmail.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Baolin Wang [Mon, 22 Jul 2024 05:43:18 +0000 (13:43 +0800)]
mm: shmem: rename shmem_is_huge() to shmem_huge_global_enabled()
shmem_is_huge() is now used to check if the top-level huge page is
enabled, thus rename it to reflect its usage.
Link: https://lkml.kernel.org/r/da53296e0ab6359aa083561d9dc01e4223d60fbe.1721626645.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com> Reviewed-by: Ryan Roberts <ryan.roberts@arm.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Barry Song <21cnbao@gmail.com> Cc: Hugh Dickins <hughd@google.com> Cc: Lance Yang <ioworker0@gmail.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Baolin Wang [Mon, 22 Jul 2024 05:43:17 +0000 (13:43 +0800)]
mm: shmem: simplify the suitable huge orders validation for tmpfs
Patch series "Some cleanups for shmem", v3.
This series does some cleanups to reuse code, rename functions and
simplify logic to make code more clear. No functional changes are
expected.
This patch (of 3):
Move the suitable huge orders validation into shmem_suitable_orders() for
tmpfs, which can reuse some code to simplify the logic.
In addition, we don't have special handling for the error code -E2BIG when
checking for conflicts with PMD sized THP in the pagecache for tmpfs,
instead, it will just fallback to order-0 allocations like this patch
does, so this simplification will not add functional changes.
Properly document that if __GFP_ZERO logic is requested, callers must
ensure that, starting with the initial memory allocation, every subsequent
call to this API for the same memory allocation is flagged with
__GFP_ZERO. Otherwise, it is possible that __GFP_ZERO is not fully
honored by this API.
Document that concurrent calls to vrealloc() with itself or vfree() for
the same memory allocation are not permitted, since it leads to undefined
behavior.
Consequently, the same applies for kvrealloc(), hence also document it
for kvrealloc().
Link: https://lkml.kernel.org/r/20240725125442.4957-1-dakr@kernel.org Suggested-by: Christoph Hellwig <hch@infradead.org> Suggested-by: Uladzislau Rezki <urezki@gmail.com> Signed-off-by: Danilo Krummrich <dakr@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Besides the obvious (and desired) difference between krealloc() and
kvrealloc(), there is some inconsistency in their function signatures and
behavior:
- krealloc() frees the memory when the requested size is zero, whereas
kvrealloc() simply returns a pointer to the existing allocation.
- krealloc() behaves like kmalloc() if a NULL pointer is passed, whereas
kvrealloc() does not accept a NULL pointer at all and, if passed,
would fault instead.
- krealloc() is self-contained, whereas kvrealloc() relies on the caller
to provide the size of the previous allocation.
Inconsistent behavior throughout allocation APIs is error prone, hence
make kvrealloc() behave like krealloc(), which seems superior in all
mentioned aspects.
Besides that, implementing kvrealloc() by making use of krealloc() and
vrealloc() provides oppertunities to grow (and shrink) allocations more
efficiently. For instance, vrealloc() can be optimized to allocate and
map additional pages to grow the allocation or unmap and free unused pages
to shrink the allocation.
Link: https://lkml.kernel.org/r/20240722163111.4766-3-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Chandan Babu R <chandan.babu@oracle.com> Cc: Christian König <christian.koenig@amd.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Kees Cook <kees@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Oliver Upton <oliver.upton@linux.dev> Cc: Pekka Enberg <penberg@kernel.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Uladzislau Rezki <urezki@gmail.com> Cc: Wedson Almeida Filho <wedsonaf@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Properly document that if __GFP_ZERO logic is requested, callers must
ensure that, starting with the initial memory allocation, every subsequent
call to this API for the same memory allocation is flagged with
__GFP_ZERO. Otherwise, it is possible that __GFP_ZERO is not fully
honored by this API.
Document that concurrent calls to vrealloc() with itself or vfree() for
the same memory allocation are not permitted, since it leads to undefined
behavior.
Consequently, the same applies for kvrealloc(), hence also document it
for kvrealloc().
Link: https://lkml.kernel.org/r/20240725125442.4957-1-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org> Suggested-by: Christoph Hellwig <hch@infradead.org> Suggested-by: Uladzislau Rezki <urezki@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Commit 5ec6d992f460 ("mm: vmalloc: implement vrealloc()") introduces
vrealloc(), but lacks the implementation of the nommu version of this
function.
Note that currently nommu isn't actually broken without this. The only
user, kvrealloc(), never actually calls into vrealloc() with nommu, since
it's guarded by is_vmalloc_addr(), which for nommu always returns false.
However, since this becomes a real issue once vrealloc() is used by other
code, fix this.
Patch series "Align kvrealloc() with krealloc()", v2.
Besides the obvious (and desired) difference between krealloc() and
kvrealloc(), there is some inconsistency in their function signatures and
behavior:
- krealloc() frees the memory when the requested size is zero, whereas
kvrealloc() simply returns a pointer to the existing allocation.
- krealloc() behaves like kmalloc() if a NULL pointer is passed, whereas
kvrealloc() does not accept a NULL pointer at all and, if passed, would fault
instead.
- krealloc() is self-contained, whereas kvrealloc() relies on the caller to
provide the size of the previous allocation.
Inconsistent behavior throughout allocation APIs is error prone, hence
make kvrealloc() behave like krealloc(), which seems superior in all
mentioned aspects.
In order to be able to get rid of kvrealloc()'s oldsize parameter,
introduce vrealloc() and make use of it in kvrealloc().
Making use of vrealloc() in kvrealloc() also provides oppertunities to
grow (and shrink) allocations more efficiently. For instance, vrealloc()
can be optimized to allocate and map additional pages to grow the
allocation or unmap and free unused pages to shrink the allocation.
Besides the above, those functions are required by Rust's allocator abstractons
[1] (rework based on this series in [2]). With `Vec` or `KVec` respectively,
potentially growing (and shrinking) data structures are rather common.
Currently, krealloc() requires the caller to pass the size of the previous
memory allocation, which, instead, should be self-contained.
We attempt to fix this in a subsequent patch which, in order to do so,
requires vrealloc().
Besides that, we need realloc() functions for kernel allocators in Rust
too. With `Vec` or `KVec` respectively, potentially growing (and
shrinking) data structures are rather common.
Link: https://lkml.kernel.org/r/20240722163111.4766-1-dakr@kernel.org Link: https://lkml.kernel.org/r/20240722163111.4766-2-dakr@kernel.org Signed-off-by: Danilo Krummrich <dakr@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Chandan Babu R <chandan.babu@oracle.com> Cc: Christian König <christian.koenig@amd.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Kees Cook <kees@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Oliver Upton <oliver.upton@linux.dev> Cc: Pekka Enberg <penberg@kernel.org> Cc: Roman Gushchin <roman.gushchin@linux.dev> Cc: Uladzislau Rezki <urezki@gmail.com> Cc: Wedson Almeida Filho <wedsonaf@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Matthew Cassell [Mon, 22 Jul 2024 17:13:16 +0000 (17:13 +0000)]
mm: add node_reclaim successes to VM event counters
/proc/vmstat currently shows the number of node_reclaim() failures when
vm.zone_reclaim_mode is set appropriately. It would be convenient to have
the number of successes right next to zone_reclaim_failed (similar to
compaction and migration).
While just a trivially addition to the vmstat file. It was helpful during
benchmarking to not have to probe node_reclaim() to observe the
success/failure ratio.
Link: https://lkml.kernel.org/r/20240722171316.7517-1-mcassell411@gmail.com Signed-off-by: Matthew Cassell <mcassell411@gmail.com> Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Li Zhijian <lizhijian@fujitsu.com> Cc: Yosry Ahmed <yosryahmed@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Petr Tesarik [Mon, 5 Aug 2024 15:07:50 +0000 (17:07 +0200)]
kexec_file: fix elfcorehdr digest exclusion when CONFIG_CRASH_HOTPLUG=y
Fix the condition to exclude the elfcorehdr segment from the SHA digest
calculation.
The j iterator is an index into the output sha_regions[] array, not into
the input image->segment[] array. Once it reaches
image->elfcorehdr_index, all subsequent segments are excluded. Besides,
if the purgatory segment precedes the elfcorehdr segment, the elfcorehdr
may be wrongly included in the calculation.
Link: https://lkml.kernel.org/r/20240805150750.170739-1-petr.tesarik@suse.com Fixes: f7cc804a9fd4 ("kexec: exclude elfcorehdr from the segment digest") Signed-off-by: Petr Tesarik <ptesarik@suse.com> Acked-by: Baoquan He <bhe@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Hari Bathini <hbathini@linux.ibm.com> Cc: Sourabh Jain <sourabhjain@linux.ibm.com> Cc: Eric DeVolder <eric_devolder@yahoo.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
When the following command line is run to try writing some memory in
CXL memory range,
$ dd if=data of=/dev/mem bs=1k seek=19136512 count=1
dd: error writing '/dev/mem': Bad address
1+0 records in
0+0 records out
0 bytes copied, 0.0283507 s, 0.0 kB/s
the command fails as expected. However, the error code is wrong. It
should be "Operation not permitted" instead of "Bad address". And,
the following warning is reported in kernel log.
In the above resource tree, "System RAM" is a descendant of "CXL Window 0"
instead of a top level resource. So, region_intersects() will report no
System RAM resources in the CXL memory region incorrectly, because it only
checks the top level resources. Consequently, devmem_is_allowed() will
return 1 (allow access via /dev/mem) for CXL memory region incorrectly.
Fortunately, ioremap() doesn't allow to map System RAM and reject the
access.
However, region_intersects() needs to be fixed to work correctly with the
resources tree with CXL Window as above. To fix it, we will search
matched resources in the descendant resources too. So, we will not miss
any matched resources anymore.
Link: https://lkml.kernel.org/r/20240816020723.771196-1-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Jonathan Cameron <jonathan.cameron@huawei.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Alison Schofield <alison.schofield@intel.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Ira Weiny <ira.weiny@intel.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Hao Ge [Fri, 16 Aug 2024 01:33:36 +0000 (09:33 +0800)]
mm/slub: add check for s->flags in the alloc_tagging_slab_free_hook
When enable CONFIG_MEMCG & CONFIG_KFENCE & CONFIG_KMEMLEAK, the following
warning always occurs,This is because the following call stack occurred:
mem_pool_alloc
kmem_cache_alloc_noprof
slab_alloc_node
kfence_alloc
Once the kfence allocation is successful,slab->obj_exts will not be empty,
because it has already been assigned a value in kfence_init_pool.
Since in the prepare_slab_obj_exts_hook function,we perform a check for
s->flags & (SLAB_NO_OBJ_EXT | SLAB_NOLEAKTRACE),the alloc_tag_add function
will not be called as a result.Therefore,ref->ct remains NULL.
However,when we call mem_pool_free,since obj_ext is not empty, it
eventually leads to the alloc_tag_sub scenario being invoked. This is
where the warning occurs.
So we should add corresponding checks in the alloc_tagging_slab_free_hook.
For __GFP_NO_OBJ_EXT case,I didn't see the specific case where it's using
kfence,so I won't add the corresponding check in
alloc_tagging_slab_free_hook for now.
Ivan Orlov [Thu, 15 Aug 2024 00:04:31 +0000 (01:04 +0100)]
kunit/overflow: fix UB in overflow_allocation_test
The 'device_name' array doesn't exist out of the
'overflow_allocation_test' function scope. However, it is being used
as a driver name when calling 'kunit_driver_create' from
'kunit_device_register'. It produces the kernel panic with KASAN
enabled due to undefined behaviour.
Since this variable is used in one place only, remove it and pass the
device name into kunit_device_register directly as an ascii string.
Ryusuke Konishi [Wed, 14 Aug 2024 10:11:19 +0000 (19:11 +0900)]
nilfs2: fix state management in error path of log writing function
After commit a694291a6211 ("nilfs2: separate wait function from
nilfs_segctor_write") was applied, the log writing function
nilfs_segctor_do_construct() was able to issue I/O requests continuously
even if user data blocks were split into multiple logs across segments,
but two potential flaws were introduced in its error handling.
First, if nilfs_segctor_begin_construction() fails while creating the
second or subsequent logs, the log writing function returns without
calling nilfs_segctor_abort_construction(), so the writeback flag set on
pages/folios will remain uncleared. This causes page cache operations to
hang waiting for the writeback flag. For example,
truncate_inode_pages_final(), which is called via nilfs_evict_inode() when
an inode is evicted from memory, will hang.
Second, the NILFS_I_COLLECTED flag set on normal inodes remain uncleared.
As a result, if the next log write involves checkpoint creation, that's
fine, but if a partial log write is performed that does not, inodes with
NILFS_I_COLLECTED set are erroneously removed from the "sc_dirty_files"
list, and their data and b-tree blocks may not be written to the device,
corrupting the block mapping.
Fix these issues by uniformly calling nilfs_segctor_abort_construction()
on failure of each step in the loop in nilfs_segctor_do_construct(),
having it clean up logs and segment usages according to progress, and
correcting the conditions for calling nilfs_redirty_inodes() to ensure
that the NILFS_I_COLLECTED flag is cleared.
Link: https://lkml.kernel.org/r/20240814101119.4070-1-konishi.ryusuke@gmail.com Fixes: a694291a6211 ("nilfs2: separate wait function from nilfs_segctor_write") Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Tested-by: Ryusuke Konishi <konishi.ryusuke@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Ryusuke Konishi [Sat, 10 Aug 2024 06:52:42 +0000 (15:52 +0900)]
nilfs2: fix missing cleanup on rollforward recovery error
In an error injection test of a routine for mount-time recovery, KASAN
found a use-after-free bug.
It turned out that if data recovery was performed using partial logs
created by dsync writes, but an error occurred before starting the log
writer to create a recovered checkpoint, the inodes whose data had been
recovered were left in the ns_dirty_files list of the nilfs object and
were not freed.
Fix this issue by cleaning up inodes that have read the recovery data if
the recovery routine fails midway before the log writer starts.
Ryusuke Konishi [Sun, 11 Aug 2024 10:03:20 +0000 (19:03 +0900)]
nilfs2: protect references to superblock parameters exposed in sysfs
The superblock buffers of nilfs2 can not only be overwritten at runtime
for modifications/repairs, but they are also regularly swapped, replaced
during resizing, and even abandoned when degrading to one side due to
backing device issues. So, accessing them requires mutual exclusion using
the reader/writer semaphore "nilfs->ns_sem".
Some sysfs attribute show methods read this superblock buffer without the
necessary mutual exclusion, which can cause problems with pointer
dereferencing and memory access, so fix it.
Jann Horn [Tue, 13 Aug 2024 20:25:22 +0000 (22:25 +0200)]
userfaultfd: don't BUG_ON() if khugepaged yanks our page table
Since khugepaged was changed to allow retracting page tables in file
mappings without holding the mmap lock, these BUG_ON()s are wrong - get
rid of them.
We could also remove the preceding "if (unlikely(...))" block, but then we
could reach pte_offset_map_lock() with transhuge pages not just for file
mappings but also for anonymous mappings - which would probably be fine
but I think is not necessarily expected.
Link: https://lkml.kernel.org/r/20240813-uffd-thp-flip-fix-v2-2-5efa61078a41@google.com Fixes: 1d65b771bc08 ("mm/khugepaged: retract_page_tables() without mmap or vma lock") Signed-off-by: Jann Horn <jannh@google.com> Reviewed-by: Qi Zheng <zhengqi.arch@bytedance.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Pavel Emelyanov <xemul@virtuozzo.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Jann Horn [Tue, 13 Aug 2024 20:25:21 +0000 (22:25 +0200)]
userfaultfd: fix checks for huge PMDs
Patch series "userfaultfd: fix races around pmd_trans_huge() check", v2.
The pmd_trans_huge() code in mfill_atomic() is wrong in three different
ways depending on kernel version:
1. The pmd_trans_huge() check is racy and can lead to a BUG_ON() (if you hit
the right two race windows) - I've tested this in a kernel build with
some extra mdelay() calls. See the commit message for a description
of the race scenario.
On older kernels (before 6.5), I think the same bug can even
theoretically lead to accessing transhuge page contents as a page table
if you hit the right 5 narrow race windows (I haven't tested this case).
2. As pointed out by Qi Zheng, pmd_trans_huge() is not sufficient for
detecting PMDs that don't point to page tables.
On older kernels (before 6.5), you'd just have to win a single fairly
wide race to hit this.
I've tested this on 6.1 stable by racing migration (with a mdelay()
patched into try_to_migrate()) against UFFDIO_ZEROPAGE - on my x86
VM, that causes a kernel oops in ptlock_ptr().
3. On newer kernels (>=6.5), for shmem mappings, khugepaged is allowed
to yank page tables out from under us (though I haven't tested that),
so I think the BUG_ON() checks in mfill_atomic() are just wrong.
I decided to write two separate fixes for these (one fix for bugs 1+2, one
fix for bug 3), so that the first fix can be backported to kernels
affected by bugs 1+2.
This patch (of 2):
This fixes two issues.
I discovered that the following race can occur:
mfill_atomic other thread
============ ============
<zap PMD>
pmdp_get_lockless() [reads none pmd]
<bail if trans_huge>
<if none:>
<pagefault creates transhuge zeropage>
__pte_alloc [no-op]
<zap PMD>
<bail if pmd_trans_huge(*dst_pmd)>
BUG_ON(pmd_none(*dst_pmd))
I have experimentally verified this in a kernel with extra mdelay() calls;
the BUG_ON(pmd_none(*dst_pmd)) triggers.
On kernels newer than commit 0d940a9b270b ("mm/pgtable: allow
pte_offset_map[_lock]() to fail"), this can't lead to anything worse than
a BUG_ON(), since the page table access helpers are actually designed to
deal with page tables concurrently disappearing; but on older kernels
(<=6.4), I think we could probably theoretically race past the two
BUG_ON() checks and end up treating a hugepage as a page table.
The second issue is that, as Qi Zheng pointed out, there are other types
of huge PMDs that pmd_trans_huge() can't catch: devmap PMDs and swap PMDs
(in particular, migration PMDs).
On <=6.4, this is worse than the first issue: If mfill_atomic() runs on a
PMD that contains a migration entry (which just requires winning a single,
fairly wide race), it will pass the PMD to pte_offset_map_lock(), which
assumes that the PMD points to a page table.
Breakage follows: First, the kernel tries to take the PTE lock (which will
crash or maybe worse if there is no "struct page" for the address bits in
the migration entry PMD - I think at least on X86 there usually is no
corresponding "struct page" thanks to the PTE inversion mitigation, amd64
looks different).
If that didn't crash, the kernel would next try to write a PTE into what
it wrongly thinks is a page table.
As part of fixing these issues, get rid of the check for pmd_trans_huge()
before __pte_alloc() - that's redundant, we're going to have to check for
that after the __pte_alloc() anyway.
Backport note: pmdp_get_lockless() is pmd_read_atomic() in older kernels.
Will Deacon [Mon, 12 Aug 2024 17:16:06 +0000 (18:16 +0100)]
mm: vmalloc: ensure vmap_block is initialised before adding to queue
Commit 8c61291fd850 ("mm: fix incorrect vbq reference in
purge_fragmented_block") extended the 'vmap_block' structure to contain a
'cpu' field which is set at allocation time to the id of the initialising
CPU.
When a new 'vmap_block' is being instantiated by new_vmap_block(), the
partially initialised structure is added to the local 'vmap_block_queue'
xarray before the 'cpu' field has been initialised. If another CPU is
concurrently walking the xarray (e.g. via vm_unmap_aliases()), then it
may perform an out-of-bounds access to the remote queue thanks to an
uninitialised index.
This has been observed as UBSAN errors in Android:
Muhammad Usama Anjum [Fri, 9 Aug 2024 08:25:11 +0000 (13:25 +0500)]
selftests: mm: fix build errors on armhf
The __NR_mmap isn't found on armhf. The mmap() is commonly available
system call and its wrapper is present on all architectures. So it should
be used directly. It solves problem for armhf and doesn't create problem
for other architectures.
Remove sys_mmap() functions as they aren't doing anything else other than
calling mmap(). There is no need to set errno = 0 manually as glibc
always resets it.
For reference errors are as following:
CC seal_elf
seal_elf.c: In function 'sys_mmap':
seal_elf.c:39:33: error: '__NR_mmap' undeclared (first use in this function)
39 | sret = (void *) syscall(__NR_mmap, addr, len, prot,
| ^~~~~~~~~
mseal_test.c: In function 'sys_mmap':
mseal_test.c:90:33: error: '__NR_mmap' undeclared (first use in this function)
90 | sret = (void *) syscall(__NR_mmap, addr, len, prot,
| ^~~~~~~~~
Link: https://lkml.kernel.org/r/20240809082511.497266-1-usama.anjum@collabora.com Fixes: 4926c7a52de7 ("selftest mm/mseal memory sealing") Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com> Cc: Jeff Xu <jeffxu@chromium.org> Cc: Kees Cook <kees@kernel.org> Cc: Liam R. Howlett <Liam.Howlett@oracle.com> Cc: Shuah Khan <shuah@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/migrate: fix deadlock in migrate_pages_batch() on large folios
Currently, migrate_pages_batch() can lock multiple locked folios with an
arbitrary order. Although folio_trylock() is used to avoid deadlock as
commit 2ef7dbb26990 ("migrate_pages: try migrate in batch asynchronously
firstly") mentioned, it seems try_split_folio() is still missing.
It was found by compaction stress test when I explicitly enable EROFS
compressed files to use large folios, which case I cannot reproduce with
the same workload if large folio support is off (current mainline).
Typically, filesystem reads (with locked file-backed folios) could use
another bdev/meta inode to load some other I/Os (e.g. inode extent
metadata or caching compressed data), so the locking order will be:
file-backed folios (A)
bdev/meta folios (B)
The following calltrace shows the deadlock:
Thread 1 takes (B) lock and tries to take folio (A) lock
Thread 2 takes (A) lock and tries to take folio (B) lock
[Thread 1]
INFO: task stress:1824 blocked for more than 30 seconds.
Tainted: G OE 6.10.0-rc7+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:stress state:D stack:0 pid:1824 tgid:1824 ppid:1822 flags:0x0000000c
Call trace:
__switch_to+0xec/0x138
__schedule+0x43c/0xcb0
schedule+0x54/0x198
io_schedule+0x44/0x70
folio_wait_bit_common+0x184/0x3f8
<-- folio mapping ffff00036d69cb18 index 996 (**)
__folio_lock+0x24/0x38
migrate_pages_batch+0x77c/0xea0 // try_split_folio (mm/migrate.c:1486:2)
// migrate_pages_batch (mm/migrate.c:1734:16)
<--- LIST_HEAD(unmap_folios) has
..
folio mapping 0xffff0000d184f1d8 index 1711; (*)
folio mapping 0xffff0000d184f1d8 index 1712;
..
migrate_pages+0xb28/0xe90
compact_zone+0xa08/0x10f0
compact_node+0x9c/0x180
sysctl_compaction_handler+0x8c/0x118
proc_sys_call_handler+0x1a8/0x280
proc_sys_write+0x1c/0x30
vfs_write+0x240/0x380
ksys_write+0x78/0x118
__arm64_sys_write+0x24/0x38
invoke_syscall+0x78/0x108
el0_svc_common.constprop.0+0x48/0xf0
do_el0_svc+0x24/0x38
el0_svc+0x3c/0x148
el0t_64_sync_handler+0x100/0x130
el0t_64_sync+0x190/0x198
[Thread 2]
INFO: task stress:1825 blocked for more than 30 seconds.
Tainted: G OE 6.10.0-rc7+ #6
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:stress state:D stack:0 pid:1825 tgid:1825 ppid:1822 flags:0x0000000c
Call trace:
__switch_to+0xec/0x138
__schedule+0x43c/0xcb0
schedule+0x54/0x198
io_schedule+0x44/0x70
folio_wait_bit_common+0x184/0x3f8
<-- folio = 0xfffffdffc6b503c0 (mapping == 0xffff0000d184f1d8 index == 1711) (*)
__folio_lock+0x24/0x38
z_erofs_runqueue+0x384/0x9c0 [erofs]
z_erofs_readahead+0x21c/0x350 [erofs] <-- folio mapping 0xffff00036d69cb18 range from [992, 1024] (**)
read_pages+0x74/0x328
page_cache_ra_order+0x26c/0x348
ondemand_readahead+0x1c0/0x3a0
page_cache_sync_ra+0x9c/0xc0
filemap_get_pages+0xc4/0x708
filemap_read+0x104/0x3a8
generic_file_read_iter+0x4c/0x150
vfs_read+0x27c/0x330
ksys_pread64+0x84/0xd0
__arm64_sys_pread64+0x28/0x40
invoke_syscall+0x78/0x108
el0_svc_common.constprop.0+0x48/0xf0
do_el0_svc+0x24/0x38
el0_svc+0x3c/0x148
el0t_64_sync_handler+0x100/0x130
el0t_64_sync+0x190/0x198
Link: https://lkml.kernel.org/r/20240729021306.398286-1-hsiangkao@linux.alibaba.com Fixes: 5dfab109d519 ("migrate_pages: batch _unmap and _move") Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Reviewed-by: "Huang, Ying" <ying.huang@intel.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suren Baghdasaryan [Tue, 13 Aug 2024 15:07:57 +0000 (08:07 -0700)]
alloc_tag: mark pages reserved during CMA activation as not tagged
During CMA activation, pages in CMA area are prepared and then freed
without being allocated. This triggers warnings when memory allocation
debug config (CONFIG_MEM_ALLOC_PROFILING_DEBUG) is enabled. Fix this by
marking these pages not tagged before freeing them.
Link: https://lkml.kernel.org/r/20240813150758.855881-2-surenb@google.com Fixes: d224eb0287fb ("codetag: debug: mark codetags for reserved pages as empty") Signed-off-by: Suren Baghdasaryan <surenb@google.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Kees Cook <keescook@chromium.org> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Sourav Panda <souravpanda@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: <stable@vger.kernel.org> [6.10] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Suren Baghdasaryan [Tue, 13 Aug 2024 15:07:56 +0000 (08:07 -0700)]
alloc_tag: introduce clear_page_tag_ref() helper function
In several cases we are freeing pages which were not allocated using
common page allocators. For such cases, in order to keep allocation
accounting correct, we should clear the page tag to indicate that the page
being freed is expected to not have a valid allocation tag. Introduce
clear_page_tag_ref() helper function to be used for this.
Link: https://lkml.kernel.org/r/20240813150758.855881-1-surenb@google.com Fixes: d224eb0287fb ("codetag: debug: mark codetags for reserved pages as empty") Signed-off-by: Suren Baghdasaryan <surenb@google.com> Suggested-by: David Hildenbrand <david@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Pasha Tatashin <pasha.tatashin@soleen.com> Cc: Kees Cook <keescook@chromium.org> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Sourav Panda <souravpanda@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: <stable@vger.kernel.org> [6.10] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Jinjie Ruan [Mon, 12 Aug 2024 06:20:17 +0000 (14:20 +0800)]
crash: fix riscv64 crash memory reserve dead loop
On RISCV64 Qemu machine with 512MB memory, cmdline "crashkernel=500M,high"
will cause system stall as below:
Zone ranges:
DMA32 [mem 0x0000000080000000-0x000000009fffffff]
Normal empty
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000080000000-0x000000008005ffff]
node 0: [mem 0x0000000080060000-0x000000009fffffff]
Initmem setup node 0 [mem 0x0000000080000000-0x000000009fffffff]
(stall here)
commit 5d99cadf1568 ("crash: fix x86_32 crash memory reserve dead loop
bug") fix this on 32-bit architecture. However, the problem is not
completely solved. If `CRASH_ADDR_LOW_MAX = CRASH_ADDR_HIGH_MAX` on
64-bit architecture, for example, when system memory is equal to
CRASH_ADDR_LOW_MAX on RISCV64, the following infinite loop will also
occur:
-> reserve_crashkernel_generic() and high is true
-> alloc at [CRASH_ADDR_LOW_MAX, CRASH_ADDR_HIGH_MAX] fail
-> alloc at [0, CRASH_ADDR_LOW_MAX] fail and repeatedly
(because CRASH_ADDR_LOW_MAX = CRASH_ADDR_HIGH_MAX).
As Catalin suggested, do not remove the ",high" reservation fallback to
",low" logic which will change arm64's kdump behavior, but fix it by
skipping the above situation similar to commit d2f32f23190b ("crash: fix
x86_32 crash memory reserve dead loop").
After this patch, it print:
cannot allocate crashkernel (size:0x1f400000)
Link: https://lkml.kernel.org/r/20240812062017.2674441-1-ruanjinjie@huawei.com Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com> Suggested-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Baoquan He <bhe@redhat.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Dave Young <dyoung@redhat.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Muhammad Usama Anjum [Fri, 9 Aug 2024 07:56:42 +0000 (12:56 +0500)]
selftests: memfd_secret: don't build memfd_secret test on unsupported arches
[1] mentions that memfd_secret is only supported on arm64, riscv, x86 and
x86_64 for now. It doesn't support other architectures. I found the
build error on arm and decided to send the fix as it was creating noise on
KernelCI:
memfd_secret.c: In function 'memfd_secret':
memfd_secret.c:42:24: error: '__NR_memfd_secret' undeclared (first use in this function);
did you mean 'memfd_secret'?
42 | return syscall(__NR_memfd_secret, flags);
| ^~~~~~~~~~~~~~~~~
| memfd_secret
Hence I'm adding condition that memfd_secret should only be compiled on
supported architectures.
Also check in run_vmtests script if memfd_secret binary is present before
executing it.
Kirill A. Shutemov [Fri, 9 Aug 2024 11:48:47 +0000 (14:48 +0300)]
mm: fix endless reclaim on machines with unaccepted memory
Unaccepted memory is considered unusable free memory, which is not counted
as free on the zone watermark check. This causes get_page_from_freelist()
to accept more memory to hit the high watermark, but it creates problems
in the reclaim path.
The reclaim path encounters a failed zone watermark check and attempts to
reclaim memory. This is usually successful, but if there is little or no
reclaimable memory, it can result in endless reclaim with little to no
progress. This can occur early in the boot process, just after start of
the init process when the only reclaimable memory is the page cache of the
init executable and its libraries.
Make unaccepted memory free from watermark check point of view. This way
unaccepted memory will never be the trigger of memory reclaim. Accept
more memory in the get_page_from_freelist() if needed.
Link: https://lkml.kernel.org/r/20240809114854.3745464-2-kirill.shutemov@linux.intel.com Fixes: dcdfdd40fa82 ("mm: Add support for unaccepted memory") Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reported-by: Jianxiong Gao <jxgao@google.com> Acked-by: David Hildenbrand <david@redhat.com> Tested-by: Jianxiong Gao <jxgao@google.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Mel Gorman <mgorman@suse.de> Cc: Mike Rapoport (Microsoft) <rppt@kernel.org> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: <stable@vger.kernel.org> [6.5+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Dan Carpenter [Fri, 9 Aug 2024 12:32:30 +0000 (15:32 +0300)]
selftests/mm: compaction_test: fix off by one in check_compaction()
The "initial_nr_hugepages" variable is unsigned long so it takes up to 20
characters to print, plus 1 more character for the NUL terminator.
Unfortunately, this buffer is not quite large enough for the terminator to
fit. Also use snprintf() for a belt and suspenders approach.
Link: https://lkml.kernel.org/r/87470c06-b45a-4e83-92ff-aac2e7b9c6ba@stanley.mountain Fixes: fb9293b6b015 ("selftests/mm: compaction_test: fix bogus test success and reduce probability of OOM-killer invocation") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Zi Yan [Fri, 9 Aug 2024 14:59:05 +0000 (10:59 -0400)]
mm/numa: no task_numa_fault() call if PMD is changed
When handling a numa page fault, task_numa_fault() should be called by a
process that restores the page table of the faulted folio to avoid
duplicated stats counting. Commit c5b5a3dd2c1f ("mm: thp: refactor NUMA
fault handling") restructured do_huge_pmd_numa_page() and did not avoid
task_numa_fault() call in the second page table check after a numa
migration failure. Fix it by making all !pmd_same() return immediately.
This issue can cause task_numa_fault() being called more than necessary
and lead to unexpected numa balancing results (It is hard to tell whether
the issue will cause positive or negative performance impact due to
duplicated numa fault counting).
Link: https://lkml.kernel.org/r/20240809145906.1513458-3-ziy@nvidia.com Fixes: c5b5a3dd2c1f ("mm: thp: refactor NUMA fault handling") Reported-by: "Huang, Ying" <ying.huang@intel.com> Closes: https://lore.kernel.org/linux-mm/87zfqfw0yw.fsf@yhuang6-desk2.ccr.corp.intel.com/ Signed-off-by: Zi Yan <ziy@nvidia.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Yang Shi <shy828301@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Zi Yan [Fri, 9 Aug 2024 14:59:04 +0000 (10:59 -0400)]
mm/numa: no task_numa_fault() call if PTE is changed
When handling a numa page fault, task_numa_fault() should be called by a
process that restores the page table of the faulted folio to avoid
duplicated stats counting. Commit b99a342d4f11 ("NUMA balancing: reduce
TLB flush via delaying mapping on hint page fault") restructured
do_numa_page() and did not avoid task_numa_fault() call in the second page
table check after a numa migration failure. Fix it by making all
!pte_same() return immediately.
This issue can cause task_numa_fault() being called more than necessary
and lead to unexpected numa balancing results (It is hard to tell whether
the issue will cause positive or negative performance impact due to
duplicated numa fault counting).
Link: https://lkml.kernel.org/r/20240809145906.1513458-2-ziy@nvidia.com Fixes: b99a342d4f11 ("NUMA balancing: reduce TLB flush via delaying mapping on hint page fault") Signed-off-by: Zi Yan <ziy@nvidia.com> Reported-by: "Huang, Ying" <ying.huang@intel.com> Closes: https://lore.kernel.org/linux-mm/87zfqfw0yw.fsf@yhuang6-desk2.ccr.corp.intel.com/ Acked-by: David Hildenbrand <david@redhat.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Yang Shi <shy828301@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Hailong Liu [Thu, 8 Aug 2024 12:19:56 +0000 (20:19 +0800)]
mm/vmalloc: fix page mapping if vm_area_alloc_pages() with high order fallback to order 0
The __vmap_pages_range_noflush() assumes its argument pages** contains
pages with the same page shift. However, since commit e9c3cda4d86e ("mm,
vmalloc: fix high order __GFP_NOFAIL allocations"), if gfp_flags includes
__GFP_NOFAIL with high order in vm_area_alloc_pages() and page allocation
failed for high order, the pages** may contain two different page shifts
(high order and order-0). This could lead __vmap_pages_range_noflush() to
perform incorrect mappings, potentially resulting in memory corruption.
Users might encounter this as follows (vmap_allow_huge = true, 2M is for
PMD_SIZE):
We can remove the fallback code because if a high-order allocation fails,
__vmalloc_node_range_noprof() will retry with order-0. Therefore, it is
unnecessary to fallback to order-0 here. Therefore, fix this by removing
the fallback code.
Link: https://lkml.kernel.org/r/20240808122019.3361-1-hailong.liu@oppo.com Fixes: e9c3cda4d86e ("mm, vmalloc: fix high order __GFP_NOFAIL allocations") Signed-off-by: Hailong Liu <hailong.liu@oppo.com> Reported-by: Tangquan Zheng <zhengtangquan@oppo.com> Reviewed-by: Baoquan He <bhe@redhat.com> Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com> Acked-by: Barry Song <baohua@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Waiman Long [Tue, 6 Aug 2024 16:41:07 +0000 (12:41 -0400)]
mm/memory-failure: use raw_spinlock_t in struct memory_failure_cpu
The memory_failure_cpu structure is a per-cpu structure. Access to its
content requires the use of get_cpu_var() to lock in the current CPU and
disable preemption. The use of a regular spinlock_t for locking purpose
is fine for a non-RT kernel.
Since the integration of RT spinlock support into the v5.15 kernel, a
spinlock_t in a RT kernel becomes a sleeping lock and taking a sleeping
lock in a preemption disabled context is illegal resulting in the
following kind of warning.
Fix it by using a raw_spinlock_t for locking instead.
Also move the pr_err() out of the lock critical section and after
put_cpu_ptr() to avoid indeterminate latency and the possibility of sleep
with this call.
[longman@redhat.com: don't hold percpu ref across pr_err(), per Miaohe] Link: https://lkml.kernel.org/r/20240807181130.1122660-1-longman@redhat.com Link: https://lkml.kernel.org/r/20240806164107.1044956-1-longman@redhat.com Fixes: 0f383b6dc96e ("locking/spinlock: Provide RT variant") Signed-off-by: Waiman Long <longman@redhat.com> Acked-by: Miaohe Lin <linmiaohe@huawei.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Naoya Horiguchi <nao.horiguchi@gmail.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Pasha Tatashin [Thu, 8 Aug 2024 21:34:36 +0000 (21:34 +0000)]
mm: don't account memmap per-node
Fix invalid access to pgdat during hot-remove operation:
ndctl users reported a GPF when trying to destroy a namespace:
$ ndctl destroy-namespace all -r all -f
Segmentation fault
dmesg:
Oops: general protection fault, probably for
non-canonical address 0xdffffc0000005650: 0000 [#1] PREEMPT SMP KASAN
PTI
KASAN: probably user-memory-access in range
[0x000000000002b280-0x000000000002b287]
CPU: 26 UID: 0 PID: 1868 Comm: ndctl Not tainted 6.11.0-rc1 #1
Hardware name: Dell Inc. PowerEdge R640/08HT8T, BIOS
2.20.1 09/13/2023
RIP: 0010:mod_node_page_state+0x2a/0x110
cxl-test users report a GPF when trying to unload the test module:
$ modrpobe -r cxl-test
dmesg
BUG: unable to handle page fault for address: 0000000000004200
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: Oops: 0000 [#1] PREEMPT SMP PTI
CPU: 0 UID: 0 PID: 1076 Comm: modprobe Tainted: G O N 6.11.0-rc1 #197
Tainted: [O]=OOT_MODULE, [N]=TEST
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/15
RIP: 0010:mod_node_page_state+0x6/0x90
Currently, when memory is hot-plugged or hot-removed the accounting is
done based on the assumption that memmap is allocated from the same node
as the hot-plugged/hot-removed memory, which is not always the case.
In addition, there are challenges with keeping the node id of the memory
that is being remove to the time when memmap accounting is actually
performed: since this is done after remove_pfn_range_from_zone(), and
also after remove_memory_block_devices(). Meaning that we cannot use
pgdat nor walking though memblocks to get the nid.
Given all of that, account the memmap overhead system wide instead.
For this we are going to be using global atomic counters, but given that
memmap size is rarely modified, and normally is only modified either
during early boot when there is only one CPU, or under a hotplug global
mutex lock, therefore there is no need for per-cpu optimizations.
Also, while we are here rename nr_memmap to nr_memmap_pages, and
nr_memmap_boot to nr_memmap_boot_pages to be self explanatory that the
units are in page count.
[pasha.tatashin@soleen.com: address a few nits from David Hildenbrand] Link: https://lkml.kernel.org/r/20240809191020.1142142-4-pasha.tatashin@soleen.com Link: https://lkml.kernel.org/r/20240809191020.1142142-4-pasha.tatashin@soleen.com Link: https://lkml.kernel.org/r/20240808213437.682006-4-pasha.tatashin@soleen.com Fixes: 15995a352474 ("mm: report per-page metadata information") Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Reported-by: Yi Zhang <yi.zhang@redhat.com> Closes: https://lore.kernel.org/linux-cxl/CAHj4cs9Ax1=CoJkgBGP_+sNu6-6=6v=_L-ZBZY0bVLD3wUWZQg@mail.gmail.com Reported-by: Alison Schofield <alison.schofield@intel.com> Closes: https://lore.kernel.org/linux-mm/Zq0tPd2h6alFz8XF@aschofie-mobl2/#t Tested-by: Dan Williams <dan.j.williams@intel.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Tested-by: Yi Zhang <yi.zhang@redhat.com> Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com> Cc: Fan Ni <fan.ni@samsung.com> Cc: Joel Granados <j.granados@samsung.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Li Zhijian <lizhijian@fujitsu.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Muchun Song <muchun.song@linux.dev> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Sourav Panda <souravpanda@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Yosry Ahmed <yosryahmed@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Pasha Tatashin [Thu, 8 Aug 2024 21:34:35 +0000 (21:34 +0000)]
mm: add system wide stats items category
/proc/vmstat contains events and stats, events can only grow, but stats
can grow and shrink.
vmstat has the following:
-------------------------
NR_VM_ZONE_STAT_ITEMS: per-zone stats
NR_VM_NUMA_EVENT_ITEMS: per-numa events
NR_VM_NODE_STAT_ITEMS: per-numa stats
NR_VM_WRITEBACK_STAT_ITEMS: system-wide background-writeback and
dirty-throttling tresholds.
NR_VM_EVENT_ITEMS: system-wide events
-------------------------
Rename NR_VM_WRITEBACK_STAT_ITEMS to NR_VM_STAT_ITEMS, to track the
system-wide stats, we are going to add per-page metadata stats to this
category in the next patch.
Also delete unused writeback_stat_name().
Link: https://lkml.kernel.org/r/20240809191020.1142142-2-pasha.tatashin@soleen.com Link: https://lkml.kernel.org/r/20240808213437.682006-3-pasha.tatashin@soleen.com Fixes: 15995a352474 ("mm: report per-page metadata information") Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Suggested-by: Yosry Ahmed <yosryahmed@google.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Acked-by: David Hildenbrand <david@redhat.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com> Cc: Joel Granados <j.granados@samsung.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Li Zhijian <lizhijian@fujitsu.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Muchun Song <muchun.song@linux.dev> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Sourav Panda <souravpanda@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Yi Zhang <yi.zhang@redhat.com> Cc: Fan Ni <fan.ni@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Pasha Tatashin [Thu, 8 Aug 2024 21:34:34 +0000 (21:34 +0000)]
mm: don't account memmap on failure
Patch series "Fixes for memmap accounting", v4.
Memmap accounting provides us with observability of how much memory is
used for per-page metadata: i.e. "struct page"'s and "struct page_ext".
It also provides with information of how much was allocated using
boot allocator (i.e. not part of MemTotal), and how much was allocated
using buddy allocated (i.e. part of MemTotal).
This small series fixes a few problems that were discovered with the
original patch.
This patch (of 3):
When we fail to allocate the mmemmap in alloc_vmemmap_page_list(), do not
account any already-allocated pages: we're going to free all them before
we return from the function.
Link: https://lkml.kernel.org/r/20240809191020.1142142-1-pasha.tatashin@soleen.com Link: https://lkml.kernel.org/r/20240808213437.682006-1-pasha.tatashin@soleen.com Link: https://lkml.kernel.org/r/20240808213437.682006-2-pasha.tatashin@soleen.com Fixes: 15995a352474 ("mm: report per-page metadata information") Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Reviewed-by: Fan Ni <fan.ni@samsung.com> Reviewed-by: Yosry Ahmed <yosryahmed@google.com> Acked-by: David Hildenbrand <david@redhat.com> Tested-by: Alison Schofield <alison.schofield@intel.com> Reviewed-by: Muchun Song <muchun.song@linux.dev> Acked-by: David Rientjes <rientjes@google.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Domenico Cerasuolo <cerasuolodomenico@gmail.com> Cc: Joel Granados <j.granados@samsung.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Li Zhijian <lizhijian@fujitsu.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Nhat Pham <nphamcs@gmail.com> Cc: Sourav Panda <souravpanda@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Yi Zhang <yi.zhang@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
David Hildenbrand [Thu, 1 Aug 2024 20:47:48 +0000 (22:47 +0200)]
mm/hugetlb: fix hugetlb vs. core-mm PT locking
We recently made GUP's common page table walking code to also walk hugetlb
VMAs without most hugetlb special-casing, preparing for the future of
having less hugetlb-specific page table walking code in the codebase.
Turns out that we missed one page table locking detail: page table locking
for hugetlb folios that are not mapped using a single PMD/PUD.
Assume we have hugetlb folio that spans multiple PTEs (e.g., 64 KiB
hugetlb folios on arm64 with 4 KiB base page size). GUP, as it walks the
page tables, will perform a pte_offset_map_lock() to grab the PTE table
lock.
However, hugetlb that concurrently modifies these page tables would
actually grab the mm->page_table_lock: with USE_SPLIT_PTE_PTLOCKS, the
locks would differ. Something similar can happen right now with hugetlb
folios that span multiple PMDs when USE_SPLIT_PMD_PTLOCKS.
This issue can be reproduced [1], for example triggering:
Let's make huge_pte_lockptr() effectively use the same PT locks as any
core-mm page table walker would. Add ptep_lockptr() to obtain the PTE
page table lock using a pte pointer -- unfortunately we cannot convert
pte_lockptr() because virt_to_page() doesn't work with kmap'ed page tables
we can have with CONFIG_HIGHPTE.
Handle CONFIG_PGTABLE_LEVELS correctly by checking in reverse order, such
that when e.g., CONFIG_PGTABLE_LEVELS==2 with
PGDIR_SIZE==P4D_SIZE==PUD_SIZE==PMD_SIZE will work as expected. Document
why that works.
There is one ugly case: powerpc 8xx, whereby we have an 8 MiB hugetlb
folio being mapped using two PTE page tables. While hugetlb wants to take
the PMD table lock, core-mm would grab the PTE table lock of one of both
PTE page tables. In such corner cases, we have to make sure that both
locks match, which is (fortunately!) currently guaranteed for 8xx as it
does not support SMP and consequently doesn't use split PT locks.
Link: https://lkml.kernel.org/r/20240801204748.99107-1-david@redhat.com Fixes: 9cb28da54643 ("mm/gup: handle hugetlb in the generic follow_page_mask code") Signed-off-by: David Hildenbrand <david@redhat.com> Acked-by: Peter Xu <peterx@redhat.com> Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com> Tested-by: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Peter Xu <peterx@redhat.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Muchun Song <muchun.song@linux.dev> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Pedro Falcato [Wed, 7 Aug 2024 17:33:35 +0000 (18:33 +0100)]
mseal: fix is_madv_discard()
is_madv_discard did its check wrong. MADV_ flags are not bitwise,
they're normal sequential numbers. So, for instance:
behavior & (/* ... */ | MADV_REMOVE)
tagged both MADV_REMOVE and MADV_RANDOM (bit 0 set) as discard
operations.
As a result the kernel could erroneously block certain madvises (e.g
MADV_RANDOM or MADV_HUGEPAGE) on sealed VMAs due to them sharing bits
with blocked MADV operations (e.g REMOVE or WIPEONFORK).
This is obviously incorrect, so use a switch statement instead.
Linus Torvalds [Sun, 11 Aug 2024 17:20:29 +0000 (10:20 -0700)]
Merge tag 'x86-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
- Fix 32-bit PTI for real.
pti_clone_entry_text() is called twice, once before initcalls so that
initcalls can use the user-mode helper and then again after text is
set read only. Setting read only on 32-bit might break up the PMD
mapping, which makes the second invocation of pti_clone_entry_text()
find the mappings out of sync and failing.
Allow the second call to split the existing PMDs in the user mapping
and synchronize with the kernel mapping.
- Don't make acpi_mp_wake_mailbox read-only after init as the mail box
must be writable in the case that CPU hotplug operations happen after
boot. Otherwise the attempt to start a CPU crashes with a write to
read only memory.
- Add a missing sanity check in mtrr_save_state() to ensure that the
fixed MTRR MSRs are supported.
Otherwise mtrr_save_state() ends up in a #GP, which is fixed up, but
the WARN_ON() can bring systems down when panic on warn is set.
* tag 'x86-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/mtrr: Check if fixed MTRRs exist before saving them
x86/paravirt: Fix incorrect virt spinlock setting on bare metal
x86/acpi: Remove __ro_after_init from acpi_mp_wake_mailbox
x86/mm: Fix PTI for i386 some more
Linus Torvalds [Sun, 11 Aug 2024 17:15:34 +0000 (10:15 -0700)]
Merge tag 'timers-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull time keeping fixes from Thomas Gleixner:
- Fix a couple of issues in the NTP code where user supplied values are
neither sanity checked nor clamped to the operating range. This
results in integer overflows and eventualy NTP getting out of sync.
According to the history the sanity checks had been removed in favor
of clamping the values, but the clamping never worked correctly under
all circumstances. The NTP people asked to not bring the sanity
checks back as it might break existing applications.
Make the clamping work correctly and add it where it's missing
- If adjtimex() sets the clock it has to trigger the hrtimer subsystem
so it can adjust and if the clock was set into the future expire
timers if needed. The caller should provide a bitmask to tell
hrtimers which clocks have been adjusted.
adjtimex() uses not the proper constant and uses CLOCK_REALTIME
instead, which is 0. So hrtimers adjusts only the clocks, but does
not check for expired timers, which might make them expire really
late. Use the proper bitmask constant instead.
* tag 'timers-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timekeeping: Fix bogus clock_was_set() invocation in do_adjtimex()
ntp: Safeguard against time_constant overflow
ntp: Clamp maxerror and esterror to operating range
Linus Torvalds [Sun, 11 Aug 2024 17:07:52 +0000 (10:07 -0700)]
Merge tag 'irq-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
"Three small fixes for interrupt core and drivers:
- The interrupt core fails to honor caller supplied affinity hints
for non-managed interrupts and uses the system default affinity on
startup instead. Set the missing flag in the descriptor to tell the
core to use the provided affinity.
- Fix a shift out of bounds error in the Xilinx driver
- Handle switching to level trigger correctly in the RISCV APLIC
driver. It failed to retrigger the interrupt which causes it to
become stale"
* tag 'irq-urgent-2024-08-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/riscv-aplic: Retrigger MSI interrupt on source configuration
irqchip/xilinx: Fix shift out of bounds
genirq/irqdesc: Honor caller provided affinity in alloc_desc()
Linus Torvalds [Sun, 11 Aug 2024 16:55:32 +0000 (09:55 -0700)]
Merge tag 'usb-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are a number of small USB driver fixes for reported issues for
6.11-rc3. Included in here are:
- usb serial driver MODULE_DESCRIPTION() updates
- usb serial driver fixes
- typec driver fixes
- usb-ip driver fix
- gadget driver fixes
- dt binding update
All of these have been in linux-next with no reported issues"
* tag 'usb-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: typec: ucsi: Fix a deadlock in ucsi_send_command_common()
usb: typec: tcpm: avoid sink goto SNK_UNATTACHED state if not received source capability message
usb: gadget: f_fs: pull out f->disable() from ffs_func_set_alt()
usb: gadget: f_fs: restore ffs_func_disable() functionality
USB: serial: debug: do not echo input by default
usb: typec: tipd: Delete extra semi-colon
usb: typec: tipd: Fix dereferencing freeing memory in tps6598x_apply_patch()
usb: gadget: u_serial: Set start_delayed during suspend
usb: typec: tcpci: Fix error code in tcpci_check_std_output_cap()
usb: typec: fsa4480: Check if the chip is really there
usb: gadget: core: Check for unset descriptor
usb: vhci-hcd: Do not drop references before new references are gained
usb: gadget: u_audio: Check return codes from usb_ep_enable and config_ep_by_speed.
usb: gadget: midi2: Fix the response for FB info with block 0xff
dt-bindings: usb: microchip,usb2514: Add USB2517 compatible
USB: serial: garmin_gps: use struct_size() to allocate pkt
USB: serial: garmin_gps: annotate struct garmin_packet with __counted_by
USB: serial: add missing MODULE_DESCRIPTION() macros
USB: serial: spcp8x5: remove unused struct 'spcp8x5_usb_ctrl_arg'
Linus Torvalds [Sun, 11 Aug 2024 16:51:29 +0000 (09:51 -0700)]
Merge tag 'tty-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty / serial driver fixes from Greg KH:
"Here are some small tty and serial driver fixes for reported problems
for 6.11-rc3. Included in here are:
- sc16is7xx serial driver fixes
- uartclk bugfix for a divide by zero issue
- conmakehash userspace build issue fix
All of these have been in linux-next for a while with no reported
issues"
* tag 'tty-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: vt: conmakehash: cope with abs_srctree no longer in env
serial: sc16is7xx: fix invalid FIFO access with special register set
serial: sc16is7xx: fix TX fifo corruption
serial: core: check uartclk for zero to avoid divide by zero
Linus Torvalds [Sun, 11 Aug 2024 16:38:38 +0000 (09:38 -0700)]
Merge tag 'driver-core-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core / documentation fixes from Greg KH:
"Here are some small fixes, and some documentation updates for
6.11-rc3. Included in here are:
- embargoed hardware documenation updates based on a lot of review by
legal-types in lots of companies to try to make the process a _bit_
easier for us to manage over time.
- rust firmware documentation fix
- driver detach race fix for the fix that went into 6.11-rc1
All of these have been in linux-next for a while with no reported
issues"
* tag 'driver-core-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
driver core: Fix uevent_show() vs driver detach race
Documentation: embargoed-hardware-issues.rst: add a section documenting the "early access" process
Documentation: embargoed-hardware-issues.rst: minor cleanups and fixes
rust: firmware: fix invalid rustdoc link
Linus Torvalds [Sun, 11 Aug 2024 16:28:04 +0000 (09:28 -0700)]
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Two core fixes: one to prevent discard type changes (seen on iSCSI)
during intermittent errors and the other is fixing a lockdep problem
caused by the queue limits change.
And one driver fix in ufs"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: sd: Keep the discard mode stable
scsi: sd: Move sd_read_cpr() out of the q->limits_lock region
scsi: ufs: core: Fix hba->last_dme_cmd_tstamp timestamp updating logic
Linus Torvalds [Sat, 10 Aug 2024 17:44:21 +0000 (10:44 -0700)]
Merge tag 'nfsd-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd fixes from Chuck Lever:
- Two minor fixes for recent changes
* tag 'nfsd-6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
nfsd: don't set SVC_SOCK_ANONYMOUS when creating nfsd sockets
sunrpc: avoid -Wformat-security warning
Linus Torvalds [Sat, 10 Aug 2024 17:28:52 +0000 (10:28 -0700)]
Merge tag 'i2c-for-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
- Two fixes for SMBusAlert handling in the I2C core: one to avoid an
endless loop when scanning for handlers and one to make sure handlers
are always called even if HW has broken behaviour
- I2C header build fix for when ACPI is enabled but I2C isn't
- The testunit gets a rename in the code to match the documentation
- Two fixes for the Qualcomm GENI I2C controller are cleaning up the
error exit patch in the runtime_resume() function. The first is
disabling the clock, the second disables the icc on the way out
* tag 'i2c-for-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: testunit: match HostNotify test name with docs
i2c: qcom-geni: Add missing geni_icc_disable in geni_i2c_runtime_resume
i2c: qcom-geni: Add missing clk_disable_unprepare in geni_i2c_runtime_resume
i2c: Fix conditional for substituting empty ACPI functions
i2c: smbus: Send alert notifications to all devices if source not found
i2c: smbus: Improve handling of stuck alerts
Linus Torvalds [Sat, 10 Aug 2024 17:19:05 +0000 (10:19 -0700)]
Merge tag 'dma-mapping-6.11-2024-08-10' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fix from Christoph Hellwig:
- avoid a deadlock with dma-debug and netconsole (Rik van Riel)
* tag 'dma-mapping-6.11-2024-08-10' of git://git.infradead.org/users/hch/dma-mapping:
dma-debug: avoid deadlock between dma debug vs printk and netconsole
Linus Torvalds [Sat, 10 Aug 2024 17:06:26 +0000 (10:06 -0700)]
Merge tag 'bcachefs-2024-08-10' of git://evilpiepirate.org/bcachefs
Pull more bcachefs fixes from Kent Overstreet:
"A couple last minute fixes for the new disk accounting
- fix a bug that was causing ACLs to seemingly "disappear"
- new on disk format version, bcachefs_metadata_version_disk_accounting_v3
bcachefs_metadata_version_disk_accounting_v2 accidentally included
padding in disk_accounting_key; fortunately, 6.11 isn't out yet so
we can fix this with another version bump"
* tag 'bcachefs-2024-08-10' of git://evilpiepirate.org/bcachefs:
bcachefs: bcachefs_metadata_version_disk_accounting_v3
bcachefs: improve bch2_dev_usage_to_text()
bcachefs: bch2_accounting_invalid()
bcachefs: Switch to .get_inode_acl()
Yong-Xuan Wang [Fri, 9 Aug 2024 07:10:47 +0000 (15:10 +0800)]
irqchip/riscv-aplic: Retrigger MSI interrupt on source configuration
The section 4.5.2 of the RISC-V AIA specification says that "any write
to a sourcecfg register of an APLIC might (or might not) cause the
corresponding interrupt-pending bit to be set to one if the rectified
input value is high (= 1) under the new source mode."
When the interrupt type is changed in the sourcecfg register, the APLIC
device might not set the corresponding pending bit, so the interrupt might
never become pending.
To handle sourcecfg register changes for level-triggered interrupts in MSI
mode, manually set the pending bit for retriggering interrupt so it gets
retriggered if it was already asserted.
Fixes: ca8df97fe679 ("irqchip/riscv-aplic: Add support for MSI-mode") Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Vincent Chen <vincent.chen@sifive.com> Reviewed-by: Anup Patel <anup@brainfault.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20240809071049.2454-1-yongxuan.wang@sifive.com
The device tree property 'xlnx,kind-of-intr' is sanity checked that the
bitmask contains only set bits which are in the range of the number of
interrupts supported by the controller.
The check is done by shifting the mask right by the number of supported
interrupts and checking the result for zero.
The data type of the mask is u32 and the number of supported interrupts is
up to 32. In case of 32 interrupts the shift is out of bounds, resulting in
a mismatch warning. The out of bounds condition is also reported by UBSAN:
UBSAN: shift-out-of-bounds in irq-xilinx-intc.c:332:22
shift exponent 32 is too large for 32-bit type 'unsigned int'
Linus Torvalds [Sat, 10 Aug 2024 04:33:25 +0000 (21:33 -0700)]
Merge tag '6.11-rc2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull smb client fixes from Steve French:
- DFS fix
- fix for security flags for requiring encryption
- minor cleanup
* tag '6.11-rc2-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: cifs_inval_name_dfs_link_error: correct the check for fullpath
Fix spelling errors in Server Message Block
smb3: fix setting SecurityFlags when encryption is required
Linus Torvalds [Sat, 10 Aug 2024 04:26:50 +0000 (21:26 -0700)]
Merge tag 'spi-fix-v6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A few SPI fixes: clock rate calculation fixes for the Kunpeng and lpsi
drivers and a missing registration of a device ID for spidev (which
had only been updated for DT cases, causing warnings)"
* tag 'spi-fix-v6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: spi-fsl-lpspi: Fix scldiv calculation
spi: spidev: Add missing spi_device_id for bh2228fv
spi: hisi-kunpeng: Add verification for the max_frequency provided by the firmware
spi: hisi-kunpeng: Add validation for the minimum value of speed_hz
bcachefs_metadata_version_disk_accounting_v2 erroneously had padding
bytes in disk_accounting_key, which is a problem because we have to
guarantee that all unused bytes in disk_accounting_key are zeroed.
Fortunately 6.11 isn't out yet, so it's cheap to fix this by spinning a
new version.
Reported-by: Gabriel de Perthuis <g2p.code@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Linus Torvalds [Fri, 9 Aug 2024 21:00:22 +0000 (14:00 -0700)]
Merge tag 'drm-fixes-2024-08-10' of https://gitlab.freedesktop.org/drm/kernel
Pull drm fixes from Dave Airlie:
"Weekly regular fixes, mostly amdgpu with i915/xe having a few each,
and then some misc bits across the board, seems about right for rc3
time.
xe:
- Fix off-by-one when processing RTP rules
- Use dma_fence_chain_free in chain fence unused as a sync
- Fix PL1 disable flow in xe_hwmon_power_max_write
- Take ref to VM in delayed dump snapshot
i915:
- correct dual pps handling for MTL_PCH+ [display]
- Adjust vma offset for framebuffer mmap offset [gem]
- Fix Virtual Memory mapping boundaries calculation [gem]
- Allow evicting to use the requested placement
- Attempt to get pages without eviction first"
* tag 'drm-fixes-2024-08-10' of https://gitlab.freedesktop.org/drm/kernel: (31 commits)
drm/xe: Take ref to VM in delayed snapshot
drm/xe/hwmon: Fix PL1 disable flow in xe_hwmon_power_max_write
drm/xe: Use dma_fence_chain_free in chain fence unused as a sync
drm/xe/rtp: Fix off-by-one when processing rules
drm/amdgpu: Add DCC GFX12 flag to enable address alignment
drm/amdgpu: correct sdma7 max dw
drm/amdgpu: Add address alignment support to DCC buffers
drm/amd/display: Skip Recompute DSC Params if no Stream on Link
drm/amdgpu: change non-dcc buffer copy configuration
drm/amdgpu: Forward soft recovery errors to userspace
drm/amdgpu: add golden setting for gc v12
drm/buddy: Add start address support to trim function
drm/amd/display: Add missing program DET segment call to pipe init
drm/amd/display: Add missing DCN314 to the DML Makefile
drm/amdgpu: force to use legacy inv in mmhub
drm/amd/pm: update powerplay structure on smu v14.0.2/3
drm/amd/display: Add missing mcache registers
drm/amd/display: Add dcc propagation value
drm/amd/display: Add missing DET segments programming
drm/amd/display: Replace dm_execute_dmub_cmd with dc_wake_and_execute_dmub_cmd
...
Kent Overstreet [Fri, 9 Aug 2024 03:19:59 +0000 (23:19 -0400)]
bcachefs: bch2_accounting_invalid()
Implement bch2_accounting_invalid(); check for junk at the end, and
replicas accounting entries in particular need to be checked or we'll
pop asserts later.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Linus Torvalds [Fri, 9 Aug 2024 17:44:35 +0000 (10:44 -0700)]
Merge tag 'pm-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki:
"Change the default EPP (energy-performence preference) value for the
Emerald Rapids processor in the intel_pstate driver.
Thisshould improve both the performance and energy efficiency (Pedro
Henrique Kopper)"
* tag 'pm-6.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: intel_pstate: Update Balance performance EPP for Emerald Rapids
Linus Torvalds [Fri, 9 Aug 2024 17:23:18 +0000 (10:23 -0700)]
Merge tag 'asm-generic-fixes-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic fixes from Arnd Bergmann:
"There are two more changes to the syscall.tbl conversion: the
'__NR_newfstat' in the previous bugfix was a mistake and gets reverted
now, after triple-checking that the contents are now back to what they
were on all architectures. The __NR_nfsservctl definition is not
really needed but came up in the same discussion as it had previously
been defined in uapi/asm-generic/unistd.h and tested for in user
space.
There are a few more symbols that used to be defined in the old
unistd.h file, but that are never defined on any other architecture
using syscall.tbl format. These used to be needed inside of the
kernel:
Searching for these on https://codesearch.debian.net/ shows a few
packages (rustc, golang, clamav, libseccomp, librsvg, strace) that
duplicate all the macros from asm/unistd.h, but nothing that actually
uses the macros, so I concluded that they are fine to omit after all"
* tag 'asm-generic-fixes-6.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
syscalls: add back legacy __NR_nfsservctl macro
syscalls: fix fstat() entry again
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