linux-kernel - [RFC PATCH 05/10] mm/damon/paddr: support addr_unit for MIGRATE

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Message-Id: <20250416042551.158131-6-sj@kernel.org>
Date: Tue, 15 Apr 2025 21:25:46 -0700
From: SeongJae Park <sj@...nel.org>
To: 
Cc: SeongJae Park <sj@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ze Zuo <zuoze1@...wei.com>,
	damon@...ts.linux.dev,
	kernel-team@...a.com,
	linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: [RFC PATCH 05/10] 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>
---
 mm/damon/paddr.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index fc1c720e8cb5..20955eefcdbf 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -518,15 +518,17 @@ static unsigned long damon_pa_migrate_pages(struct list_head *folio_list,
 	return nr_migrated;
 }
 
-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;
+	unsigned long 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;
@@ -691,7 +693,7 @@ 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);
 #ifdef CONFIG_ACMA
 	case DAMOS_ALLOC:
 		return damon_pa_alloc_or_free(r, scheme, true);
-- 
2.39.5