diff options
| author | Frederic Weisbecker <frederic@kernel.org> | 2025-06-04 14:02:40 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <frederic@kernel.org> | 2026-02-03 15:23:35 +0100 |
| commit | e894f633980804a528a2d6996c4ea651df631632 (patch) | |
| tree | 8bd64eb9ec9b30da5deba98bccc4713a1280f146 /include | |
| parent | 79c0abaf06fca6e715cf792daed580542fc4a2c4 (diff) | |
kthread: Honour kthreads preferred affinity after cpuset changes
When cpuset isolated partitions get updated, unbound kthreads get
indifferently affine to all non isolated CPUs, regardless of their
individual affinity preferences.
For example kswapd is a per-node kthread that prefers to be affine to
the node it refers to. Whenever an isolated partition is created,
updated or deleted, kswapd's node affinity is going to be broken if any
CPU in the related node is not isolated because kswapd will be affine
globally.
Fix this with letting the consolidated kthread managed affinity code do
the affinity update on behalf of cpuset.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Reviewed-by: Waiman Long <longman@redhat.com>
Cc: Michal Koutný <mkoutny@suse.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Marco Crivellari <marco.crivellari@suse.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Waiman Long <longman@redhat.com>
Cc: cgroups@vger.kernel.org
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kthread.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/kthread.h b/include/linux/kthread.h index 8d27403888ce..c92c1149ee6e 100644 --- a/include/linux/kthread.h +++ b/include/linux/kthread.h @@ -100,6 +100,7 @@ void kthread_unpark(struct task_struct *k); void kthread_parkme(void); void kthread_exit(long result) __noreturn; void kthread_complete_and_exit(struct completion *, long) __noreturn; +int kthreads_update_housekeeping(void); int kthreadd(void *unused); extern struct task_struct *kthreadd_task; |