linux-kernel - [PATCH v3 04/11] mm/damon/paddr: support addr_unit for DAMOS_LRU

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Message-Id: <20250828171242.59810-5-sj@kernel.org>
Date: Thu, 28 Aug 2025 10:12:35 -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 04/11] mm/damon/paddr: support addr_unit for DAMOS_LRU_[DE]PRIO

Add support of addr_unit for DAMOS_LRU_PRIO and DAMOS_LRU_DEPRIO 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 | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 696aeb0f6c8e..2cd1c9953983 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -207,14 +207,15 @@ static unsigned long damon_pa_pageout(struct damon_region *r,
 }
 
 static inline unsigned long damon_pa_mark_accessed_or_deactivate(
-		struct damon_region *r, struct damos *s, bool mark_accessed,
+		struct damon_region *r, unsigned long addr_unit,
+		struct damos *s, bool mark_accessed,
 		unsigned long *sz_filter_passed)
 {
-	unsigned long addr, applied = 0;
+	phys_addr_t addr, applied = 0;
 	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;
@@ -224,7 +225,7 @@ static inline unsigned long damon_pa_mark_accessed_or_deactivate(
 		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 (mark_accessed)
 			folio_mark_accessed(folio);
@@ -236,20 +237,22 @@ static inline unsigned long damon_pa_mark_accessed_or_deactivate(
 		folio_put(folio);
 	}
 	s->last_applied = folio;
-	return applied * PAGE_SIZE;
+	return damon_pa_core_addr(applied * PAGE_SIZE, addr_unit);
 }
 
 static unsigned long damon_pa_mark_accessed(struct damon_region *r,
-	struct damos *s, unsigned long *sz_filter_passed)
+		unsigned long addr_unit, struct damos *s,
+		unsigned long *sz_filter_passed)
 {
-	return damon_pa_mark_accessed_or_deactivate(r, s, true,
+	return damon_pa_mark_accessed_or_deactivate(r, addr_unit, s, true,
 			sz_filter_passed);
 }
 
 static unsigned long damon_pa_deactivate_pages(struct damon_region *r,
-	struct damos *s, unsigned long *sz_filter_passed)
+		unsigned long addr_unit, struct damos *s,
+		unsigned long *sz_filter_passed)
 {
-	return damon_pa_mark_accessed_or_deactivate(r, s, false,
+	return damon_pa_mark_accessed_or_deactivate(r, addr_unit, s, false,
 			sz_filter_passed);
 }
 
@@ -322,9 +325,11 @@ static unsigned long damon_pa_apply_scheme(struct damon_ctx *ctx,
 	case DAMOS_PAGEOUT:
 		return damon_pa_pageout(r, aunit, scheme, sz_filter_passed);
 	case DAMOS_LRU_PRIO:
-		return damon_pa_mark_accessed(r, scheme, sz_filter_passed);
+		return damon_pa_mark_accessed(r, aunit, scheme,
+				sz_filter_passed);
 	case DAMOS_LRU_DEPRIO:
-		return damon_pa_deactivate_pages(r, scheme, sz_filter_passed);
+		return damon_pa_deactivate_pages(r, aunit, scheme,
+				sz_filter_passed);
 	case DAMOS_MIGRATE_HOT:
 	case DAMOS_MIGRATE_COLD:
 		return damon_pa_migrate(r, scheme, sz_filter_passed);
-- 
2.39.5