The patch titled Subject: mm/damon/core: use damos_commit_quota_goal() for new goal commit has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-damon-core-use-damos_commit_quota_goal-for-new-goal-commit.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: SeongJae Park sj@kernel.org Subject: mm/damon/core: use damos_commit_quota_goal() for new goal commit Date: Mon, 13 Oct 2025 17:18:44 -0700

When damos_commit_quota_goals() is called for adding new DAMOS quota goals of DAMOS_QUOTA_USER_INPUT metric, current_value fields of the new goals should be also set as requested.

However, damos_commit_quota_goals() is not updating the field for the case, since it is setting only metrics and target values using damos_new_quota_goal(), and metric-optional union fields using damos_commit_quota_goal_union(). As a result, users could see the first current_value parameter that committed online with a new quota goal is ignored. Users are assumed to commit the current_value for DAMOS_QUOTA_USER_INPUT quota goals, since it is being used as a feedback. Hence the real impact would be subtle. That said, this is obviously not intended behavior.

Fix the issue by using damos_commit_quota_goal() which sets all quota goal parameters, instead of damos_commit_quota_goal_union(), which sets only the union fields.

Link: https://lkml.kernel.org/r/20251014001846.279282-1-sj@kernel.org Fixes: 1aef9df0ee90 ("mm/damon/core: commit damos_quota_goal->nid") Signed-off-by: SeongJae Park sj@kernel.org Cc: stable@vger.kernel.org [6.16+] Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

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

--- a/mm/damon/core.c~mm-damon-core-use-damos_commit_quota_goal-for-new-goal-commit +++ a/mm/damon/core.c @@ -835,7 +835,7 @@ int damos_commit_quota_goals(struct damo src_goal->metric, src_goal->target_value); if (!new_goal) return -ENOMEM; - damos_commit_quota_goal_union(new_goal, src_goal); + damos_commit_quota_goal(new_goal, src_goal); damos_add_quota_goal(dst, new_goal); } return 0; _

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

mm-damon-sysfs-catch-commit-test-ctx-alloc-failure.patch mm-damon-sysfs-dealloc-commit-test-ctx-always.patch mm-damon-core-fix-list_add_tail-call-on-damon_call.patch mm-damon-core-use-damos_commit_quota_goal-for-new-goal-commit.patch mm-zswap-remove-unnecessary-dlen-writes-for-incompressible-pages.patch mm-zswap-fix-typos-s-zwap-zswap.patch mm-zswap-s-red-black-tree-xarray.patch docs-admin-guide-mm-zswap-s-red-black-tree-xarray.patch