mm/damon/paddr: support addr_unit for MIGRATE_{HOT,COLD}

Add support of addr_unit for DAMOS_MIGRATE_HOT and DAMOS_MIGRATE_COLD
action handling from the DAMOS operation implementation for the physical
address space.

Link: https://lkml.kernel.org/r/20250828171242.59810-6-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Quanmin Yan <yanquanmin1@huawei.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: ze zuo <zuoze1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 2cd1c9953983c7a79853c78ae51ab46a12555b61..0a122a8a9f1c7fa51e6606937e61f49cc4a06367 100644 (file)
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -256,15 +256,16 @@ static unsigned long damon_pa_deactivate_pages(struct damon_region *r,
                        sz_filter_passed);
 }
 
-static unsigned long damon_pa_migrate(struct damon_region *r, struct damos *s,
+static unsigned long damon_pa_migrate(struct damon_region *r,
+               unsigned long addr_unit, struct damos *s,
                unsigned long *sz_filter_passed)
 {
-       unsigned long addr, applied;
+       phys_addr_t addr, applied;
        LIST_HEAD(folio_list);
        struct folio *folio;
 
-       addr = r->ar.start;
-       while (addr < r->ar.end) {
+       addr = damon_pa_phys_addr(r->ar.start, addr_unit);
+       while (addr < damon_pa_phys_addr(r->ar.end, addr_unit)) {
                folio = damon_get_folio(PHYS_PFN(addr));
                if (damon_pa_invalid_damos_folio(folio, s)) {
                        addr += PAGE_SIZE;
@@ -274,7 +275,7 @@ static unsigned long damon_pa_migrate(struct damon_region *r, struct damos *s,
                if (damos_pa_filter_out(s, folio))
                        goto put_folio;
                else
-                       *sz_filter_passed += folio_size(folio);
+                       *sz_filter_passed += folio_size(folio) / addr_unit;
 
                if (!folio_isolate_lru(folio))
                        goto put_folio;
@@ -286,7 +287,7 @@ put_folio:
        applied = damon_migrate_pages(&folio_list, s->target_nid);
        cond_resched();
        s->last_applied = folio;
-       return applied * PAGE_SIZE;
+       return damon_pa_core_addr(applied * PAGE_SIZE, addr_unit);
 }
 
 static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
@@ -332,7 +333,7 @@ static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx,
                                sz_filter_passed);
        case DAMOS_MIGRATE_HOT:
        case DAMOS_MIGRATE_COLD:
-               return damon_pa_migrate(r, scheme, sz_filter_passed);
+               return damon_pa_migrate(r, aunit, scheme, sz_filter_passed);
        case DAMOS_STAT:
                return damon_pa_stat(r, scheme, sz_filter_passed);
        default: