linux-kernel - [PATCH v3 05/11] mm/damon/paddr: support addr_unit for MIGRATE

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250828171242.59810-6-sj@kernel.org>
Date: Thu, 28 Aug 2025 10:12:36 -0700
From: SeongJae Park <sj@...nel.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: SeongJae Park <sj@...nel.org>,
	Quanmin Yan <yanquanmin1@...wei.com>,
	damon@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	wangkefeng.wang@...wei.com,
	zuoze1@...wei.com
Subject: [PATCH v3 05/11] 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.

Signed-off-by: SeongJae Park <sj@...nel.org>
Signed-off-by: Quanmin Yan <yanquanmin1@...wei.com>
Reviewed-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/paddr.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 2cd1c9953983..0a122a8a9f1c 100644
--- 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 @@ static unsigned long damon_pa_migrate(struct damon_region *r, struct damos *s,
 	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:
-- 
2.39.5