The patch titled
Subject: mm/damon/paddr: do page level access check for pageout DAMOS action on its own
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-paddr-do-page-level-access-check-for-pageout-damos-action-on-its-own.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-paddr-do-page-level-access-check-for-pageout-damos-action-on-its-own.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon/paddr: do page level access check for pageout DAMOS action on its own
Date: Mon, 29 Apr 2024 15:44:49 -0700
'pageout' DAMOS action implementation of 'paddr' DAMON operations set asks
reclaim_pages() to do page level access check if the user is not asking
DAMOS to do that on its own. Simplify the logic by making the check
always be done by 'paddr'.
Link: https://lkml.kernel.org/r/20240429224451.67081-3-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/paddr.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
--- a/mm/damon/paddr.c~mm-damon-paddr-do-page-level-access-check-for-pageout-damos-action-on-its-own
+++ a/mm/damon/paddr.c
@@ -244,16 +244,22 @@ static unsigned long damon_pa_pageout(st
{
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(st
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;
}
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
mm-damon-paddr-implement-damon_folio_young.patch
mm-damon-paddr-implement-damon_folio_mkold.patch
mm-damon-add-damos-filter-type-young.patch
mm-damon-paddr-implement-damos-filter-type-young.patch
docs-mm-damon-design-document-young-page-type-damos-filter.patch
docs-admin-guide-mm-damon-usage-update-for-young-page-type-damos-filter.patch
docs-abi-damon-update-for-youg-page-type-damos-filter.patch
mm-damon-paddr-avoid-unnecessary-page-level-access-check-for-pageout-damos-action.patch
mm-damon-paddr-do-page-level-access-check-for-pageout-damos-action-on-its-own.patch
mm-vmscan-remove-ignore_references-argument-of-reclaim_pages.patch
mm-vmscan-remove-ignore_references-argument-of-reclaim_folio_list.patch
