mm/damon/paddr: support addr_unit for DAMOS_STAT

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

Link: https://lkml.kernel.org/r/20250828171242.59810-7-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 0a122a8a9f1c7fa51e6606937e61f49cc4a06367..07a8aead439eb1e62fe67e6681f0ce781a971701 100644 (file)
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -290,17 +290,18 @@ put_folio:
        return damon_pa_core_addr(applied * PAGE_SIZE, addr_unit);
 }
 
-static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
+static unsigned long damon_pa_stat(struct damon_region *r,
+               unsigned long addr_unit, struct damos *s,
                unsigned long *sz_filter_passed)
 {
-       unsigned long addr;
+       phys_addr_t addr;
        struct folio *folio;
 
        if (!damos_ops_has_filter(s))
                return 0;
 
-       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;
@@ -308,7 +309,7 @@ static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
                }
 
                if (!damos_pa_filter_out(s, folio))
-                       *sz_filter_passed += folio_size(folio);
+                       *sz_filter_passed += folio_size(folio) / addr_unit;
                addr += folio_size(folio);
                folio_put(folio);
        }
@@ -335,7 +336,7 @@ static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx,
        case DAMOS_MIGRATE_COLD:
                return damon_pa_migrate(r, aunit, scheme, sz_filter_passed);
        case DAMOS_STAT:
-               return damon_pa_stat(r, scheme, sz_filter_passed);
+               return damon_pa_stat(r, aunit, scheme, sz_filter_passed);
        default:
                /* DAMOS actions that not yet supported by 'paddr'. */
                break;