The patch titled Subject: samples/damon: fix damon sample wsse for start failure has been added to the -mm mm-hotfixes-unstable branch. Its filename is samples-damon-fix-damon-sample-wsse-for-start-failure.patch
This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...
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: Honggyu Kim honggyu.kim@sk.com Subject: samples/damon: fix damon sample wsse for start failure Date: Wed, 2 Jul 2025 09:02:02 +0900
The damon_sample_wsse_start() can fail so we must reset the "enable" parameter to "false" again for proper rollback.
In such cases, setting Y to "enable" then N triggers the similar crash with wsse because damon sample start failed but the "enable" stays as Y.
Link: https://lkml.kernel.org/r/20250702000205.1921-3-honggyu.kim@sk.com Fixes: b757c6cfc696 ("samples/damon/wsse: start and stop DAMON as the user requests") Signed-off-by: Honggyu Kim honggyu.kim@sk.com Reviewed-by: SeongJae Park sj@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
samples/damon/wsse.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/samples/damon/wsse.c~samples-damon-fix-damon-sample-wsse-for-start-failure +++ a/samples/damon/wsse.c @@ -102,8 +102,12 @@ static int damon_sample_wsse_enable_stor if (enable == enabled) return 0;
- if (enable) - return damon_sample_wsse_start(); + if (enable) { + err = damon_sample_wsse_start(); + if (err) + enable = false; + return err; + } damon_sample_wsse_stop(); return 0; } _
Patches currently in -mm which might be from honggyu.kim@sk.com are
samples-damon-fix-damon-sample-prcl-for-start-failure.patch samples-damon-fix-damon-sample-wsse-for-start-failure.patch samples-damon-fix-damon-sample-mtier-for-start-failure.patch mm-damon-fix-divide-by-zero-in-damon_get_intervals_score.patch