diff options
| author | Frederic Weisbecker <frederic@kernel.org> | 2025-06-13 14:48:31 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <frederic@kernel.org> | 2026-02-03 15:23:34 +0100 |
| commit | ce84ad5e994aea5d41ff47135a71439ad4f54005 (patch) | |
| tree | 00cb8a97c3a6948c5f3a76b4b7e487be823b2ef0 /mm | |
| parent | b7eb4edcc3b5cd7ffdcbd56fa7a12de41b39424d (diff) | |
sched/isolation: Flush vmstat workqueues on cpuset isolated partition change
The HK_TYPE_DOMAIN housekeeping cpumask is now modifiable at runtime.
In order to synchronize against vmstat workqueue to make sure
that no asynchronous vmstat work is still pending or executing on a
newly made isolated CPU, the housekeeping susbsystem must flush the
vmstat workqueues.
This involves flushing the whole mm_percpu_wq workqueue, shared with
LRU drain, introducing here a welcome side effect.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
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: linux-mm@kvack.org
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/vmstat.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/mm/vmstat.c b/mm/vmstat.c index ed19c0d42de6..d6e814c82952 100644 --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -2124,6 +2124,11 @@ static void vmstat_shepherd(struct work_struct *w); static DECLARE_DEFERRABLE_WORK(shepherd, vmstat_shepherd); +void vmstat_flush_workqueue(void) +{ + flush_workqueue(mm_percpu_wq); +} + static void vmstat_shepherd(struct work_struct *w) { int cpu; |