The patch titled
Subject: mm/damon/core: check apply interval in damon_do_apply_schemes()
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-damon-core-check-apply-interval-in-damon_do_apply_schemes.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-core-check-apply-interval-in-damon_do_apply_schemes.patch
This patch will later appear in the mm-hotfixes-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/core: check apply interval in damon_do_apply_schemes()
Date: Mon, 5 Feb 2024 12:13:06 -0800
kdamond_apply_schemes() checks apply intervals of schemes and avoid
further applying any schemes if no scheme passed its apply interval.
However, the following schemes applying function, damon_do_apply_schemes()
iterates all schemes without the apply interval check. As a result, the
shortest apply interval is applied to all schemes. Fix the problem by
checking the apply interval in damon_do_apply_schemes().
Link: https://lkml.kernel.org/r/20240205201306.88562-1-sj@xxxxxxxxxx
Fixes: 42f994b71404 ("mm/damon/core: implement scheme-specific apply interval")
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [6.7.x]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/core.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
--- a/mm/damon/core.c~mm-damon-core-check-apply-interval-in-damon_do_apply_schemes
+++ a/mm/damon/core.c
@@ -1026,6 +1026,9 @@ static void damon_do_apply_schemes(struc
damon_for_each_scheme(s, c) {
struct damos_quota *quota = &s->quota;
+ if (c->passed_sample_intervals != s->next_apply_sis)
+ continue;
+
if (!s->wmarks.activated)
continue;
@@ -1176,10 +1179,6 @@ static void kdamond_apply_schemes(struct
if (c->passed_sample_intervals != s->next_apply_sis)
continue;
- s->next_apply_sis +=
- (s->apply_interval_us ? s->apply_interval_us :
- c->attrs.aggr_interval) / sample_interval;
-
if (!s->wmarks.activated)
continue;
@@ -1195,6 +1194,14 @@ static void kdamond_apply_schemes(struct
damon_for_each_region_safe(r, next_r, t)
damon_do_apply_schemes(c, t, r);
}
+
+ damon_for_each_scheme(s, c) {
+ if (c->passed_sample_intervals != s->next_apply_sis)
+ continue;
+ s->next_apply_sis +=
+ (s->apply_interval_us ? s->apply_interval_us :
+ c->attrs.aggr_interval) / sample_interval;
+ }
}
/*
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
mm-damon-sysfs-schemes-fix-wrong-damos-tried-regions-update-timeout-setup.patch
mm-damon-core-check-apply-interval-in-damon_do_apply_schemes.patch
docs-admin-guide-mm-damon-usage-use-sysfs-interface-for-tracepoints-example.patch
mm-damon-rename-config_damon_dbgfs-to-damon_dbgfs_deprecated.patch
mm-damon-dbgfs-implement-deprecation-notice-file.patch
mm-damon-dbgfs-make-debugfs-interface-deprecation-message-a-macro.patch
docs-admin-guide-mm-damon-usage-document-deprecated-file-of-damon-debugfs-interface.patch
selftets-damon-prepare-for-monitor_on-file-renaming.patch
mm-damon-dbgfs-rename-monitor_on-file-to-monitor_on_deprecated.patch
docs-admin-guide-mm-damon-usage-update-for-monitor_on-renaming.patch
docs-translations-damon-usage-update-for-monitor_on-renaming.patch
