The quilt patch titled Subject: samples/damon: fix damon sample mtier for start failure has been removed from the -mm tree. Its filename was samples-damon-fix-damon-sample-mtier-for-start-failure.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------ From: Honggyu Kim honggyu.kim@sk.com Subject: samples/damon: fix damon sample mtier for start failure Date: Wed, 2 Jul 2025 09:02:03 +0900
The damon_sample_mtier_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 mtier because damon sample start failed but the "enable" stays as Y.
Link: https://lkml.kernel.org/r/20250702000205.1921-4-honggyu.kim@sk.com Fixes: 82a08bde3cf7 ("samples/damon: implement a DAMON module for memory tiering") 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/mtier.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
--- a/samples/damon/mtier.c~samples-damon-fix-damon-sample-mtier-for-start-failure +++ a/samples/damon/mtier.c @@ -164,8 +164,12 @@ static int damon_sample_mtier_enable_sto if (enable == enabled) return 0;
- if (enable) - return damon_sample_mtier_start(); + if (enable) { + err = damon_sample_mtier_start(); + if (err) + enable = false; + return err; + } damon_sample_mtier_stop(); return 0; } _
Patches currently in -mm which might be from honggyu.kim@sk.com are
samples-damon-change-enable-parameters-to-enabled.patch