]> www.infradead.org Git - users/jedix/linux-maple.git/commit
mm/mempolicy: use vma iterator & maple state instead of vma linked list
authorLiam R. Howlett <Liam.Howlett@Oracle.com>
Mon, 22 Aug 2022 15:06:30 +0000 (15:06 +0000)
committerAndrew Morton <akpm@linux-foundation.org>
Mon, 22 Aug 2022 22:58:29 +0000 (15:58 -0700)
commit870e456bd5efe0695e4c7316be54feba73235a58
tree40b0aba77eff960e867c463a8b3baba498b3d3ba
parent2dd954bddb6a4a445c603ca41f79b34f73288b88
mm/mempolicy: use vma iterator & maple state instead of vma linked list

Reworked the way mbind_range() finds the first VMA to reuse the maple
state and limit the number of tree walks needed.

Note, this drops the VM_BUG_ON(!vma) call, which would catch a start
address higher than the last VMA.  The code was written in a way that
allowed no VMA updates to occur and still return success.  There should be
no functional change to this scenario with the new code.

Link: https://lkml.kernel.org/r/20220822150128.1562046-57-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Cc: Yu Zhao <yuzhao@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mm/mempolicy.c