+ mm-damon-lru_sort-use-param_ctx-for-damon_attrs-staging.patch added to mm-unstable branch

+ mm-damon-lru_sort-use-param_ctx-for-damon_attrs-staging.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/damon/lru_sort: use param_ctx for damon_attrs staging
has been added to the -mm mm-unstable branch.  Its filename is
     mm-damon-lru_sort-use-param_ctx-for-damon_attrs-staging.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-lru_sort-use-param_ctx-for-damon_attrs-staging.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days

------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon/lru_sort: use param_ctx for damon_attrs staging
Date: Mon, 15 Sep 2025 20:15:49 -0700

damon_lru_sort_apply_parameters() allocates a new DAMON context, stages
user-specified DAMON parameters on it, and commits to running DAMON
context at once, using damon_commit_ctx().  The code is, however, directly
updating the monitoring attributes of the running context.  And the
attributes are over-written by later damon_commit_ctx() call.  This means
that the monitoring attributes parameters are not really working.  Fix the
wrong use of the parameter context.

Link: https://lkml.kernel.org/r/20250916031549.115326-1-sj@kernel.org
Fixes: a30969436428 ("mm/damon/lru_sort: use damon_commit_ctx()")
Signed-off-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
Cc: <stable@vger.kernel.org>	[6.11+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/lru_sort.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/damon/lru_sort.c~mm-damon-lru_sort-use-param_ctx-for-damon_attrs-staging
+++ a/mm/damon/lru_sort.c
@@ -219,7 +219,7 @@ static int damon_lru_sort_apply_paramete
 		goto out;
 	}
 
-	err = damon_set_attrs(ctx, &damon_lru_sort_mon_attrs);
+	err = damon_set_attrs(param_ctx, &damon_lru_sort_mon_attrs);
 	if (err)
 		goto out;
 
_

Patches currently in -mm which might be from sj@kernel.org are

mm-damon-lru_sort-use-param_ctx-for-damon_attrs-staging.patch
mm-damon-core-reset-age-if-nr_accesses-changes-between-non-zero-and-zero.patch
mm-damon-core-set-effective-quota-on-first-charge-window.patch
mm-damon-lru_sort-use-param_ctx-correctly.patch
docs-mm-damon-maintainer-profile-update-community-meetup-for-reservation-requirements.patch
docs-admin-guide-mm-damon-start-add-target_pid-to-damos-example-command.patch
maintainers-rename-damon-section.patch