diff options
| author | Frederic Weisbecker <frederic@kernel.org> | 2025-06-12 15:36:16 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <frederic@kernel.org> | 2026-02-03 15:23:34 +0100 |
| commit | b7eb4edcc3b5cd7ffdcbd56fa7a12de41b39424d (patch) | |
| tree | 75a451c8a1526735cc48b610e6a9a37c8474fbcd /kernel/sched | |
| parent | 03ff7351016983653bab5b38e58529d0e38a28cf (diff) | |
sched/isolation: Flush memcg workqueues on cpuset isolated partition change
The HK_TYPE_DOMAIN housekeeping cpumask is now modifiable at runtime. In
order to synchronize against memcg workqueue to make sure that no
asynchronous draining is still pending or executing on a newly made
isolated CPU, the housekeeping susbsystem must flush the memcg
workqueues.
However the memcg workqueues can't be flushed easily since they are
queued to the main per-CPU workqueue pool.
Solve this with creating a memcg specific pool and provide and use the
appropriate flushing API.
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
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: Muchun Song <muchun.song@linux.dev>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
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
Cc: linux-mm@kvack.org
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/isolation.c | 2 | ||||
| -rw-r--r-- | kernel/sched/sched.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 674a02891b38..f4053ebf4027 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -144,6 +144,8 @@ int housekeeping_update(struct cpumask *isol_mask) synchronize_rcu(); + mem_cgroup_flush_workqueue(); + kfree(old); return 0; diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 653e898a996a..65dfa48e54b7 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -44,6 +44,7 @@ #include <linux/lockdep_api.h> #include <linux/lockdep.h> #include <linux/memblock.h> +#include <linux/memcontrol.h> #include <linux/minmax.h> #include <linux/mm.h> #include <linux/module.h> |