[merged mm-stable] mm-damon-paddr-do-page-level-access-check-for-pageout-damos-action-on-its-own.patch removed from -mm tree

[merged mm-stable] mm-damon-paddr-do-page-level-access-check-for-pageout-damos-action-on-its-own.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm/damon/paddr: do page level access check for pageout DAMOS action on its own
has been removed from the -mm tree.  Its filename was
     mm-damon-paddr-do-page-level-access-check-for-pageout-damos-action-on-its-own.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
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@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 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@kernel.org are

selftests-damon-_damon_sysfs-support-quota-goals.patch
selftests-damon-add-a-test-for-damos-quota-goal.patch
mm-damon-core-initialize-esz_bp-from-damos_quota_init_priv.patch
selftests-damon-_damon_sysfs-check-errors-from-nr_schemes-file-reads.patch
selftests-damon-_damon_sysfs-find-sysfs-mount-point-from-proc-mounts.patch
selftests-damon-_damon_sysfs-use-is-instead-of-==-for-none.patch
selftests-damon-classify-tests-for-functionalities-and-regressions.patch
docs-admin-guide-mm-damon-usage-fix-wrong-example-of-damos-filter-matching-sysfs-file.patch
docs-admin-guide-mm-damon-usage-fix-wrong-schemes-effective-quota-update-command.patch
docs-mm-damon-design-use-a-list-for-supported-filters.patch
docs-mm-damon-maintainer-profile-change-the-maintainers-timezone-from-pst-to-pt.patch
docs-mm-damon-maintainer-profile-allow-posting-patches-based-on-damon-next-tree.patch