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From 049400964587a2a49b2186f88981b38f6b1efe80 Mon Sep 17 00:00:00 2001
From: SeongJae Park <sj@kernel.org>
Date: Fri, 8 Mar 2024 16:21:03 -0800
Subject: [PATCH] mm/damon/paddr: do page level access check for pageout DAMOS
action on its own
Signed-off-by: SeongJae Park <sj@kernel.org>
---
mm/damon/paddr.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index d5f2f7ddf8638..974edef1740d0 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -244,16 +244,22 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s)
{
unsigned long addr, applied;
LIST_HEAD(folio_list);
- bool ignore_references = false;
+ bool install_young_filter = true;
struct damos_filter *filter;
- /* respect user's page level reference check handling request */
+ /* check access in page level again by default */
damos_for_each_filter(filter, s) {
if (filter->type == DAMOS_FILTER_TYPE_YOUNG) {
- ignore_references = true;
+ install_young_filter = false;
break;
}
}
+ if (install_young_filter) {
+ filter = damos_new_filter(DAMOS_FILTER_TYPE_YOUNG, true);
+ if (!filter)
+ return 0;
+ damos_add_filter(s, filter);
+ }
for (addr = r->ar.start; addr < r->ar.end; addr += PAGE_SIZE) {
struct folio *folio = damon_get_folio(PHYS_PFN(addr));
@@ -275,7 +281,9 @@ static unsigned long damon_pa_pageout(struct damon_region *r, struct damos *s)
put_folio:
folio_put(folio);
}
- applied = reclaim_pages(&folio_list, ignore_references);
+ if (install_young_filter)
+ damos_destroy_filter(filter);
+ applied = reclaim_pages(&folio_list, true);
cond_resched();
return applied * PAGE_SIZE;
}
--
2.39.2
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