From: Shakeel Butt <shakeel.butt@linux.dev>
To: Frederic Weisbecker <frederic@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Marco Crivellari <marco.crivellari@suse.com>,
Michal Hocko <mhocko@kernel.org>, Michal Hocko <mhocko@suse.com>,
Muchun Song <muchun.song@linux.dev>,
Peter Zijlstra <peterz@infradead.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Tejun Heo <tj@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
Vlastimil Babka <vbabka@suse.cz>,
Waiman Long <longman@redhat.com>,
cgroups@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH 16/27] sched/isolation: Flush memcg workqueues on cpuset isolated partition change
Date: Fri, 20 Jun 2025 12:30:03 -0700 [thread overview]
Message-ID: <ezplssjtvj5kfp7zutj5ufmmxvvyd2bioxdsfqaauzi5i6b3yv@2hbbax4kfct6> (raw)
In-Reply-To: <20250620152308.27492-17-frederic@kernel.org>
On Fri, Jun 20, 2025 at 05:22:57PM +0200, Frederic Weisbecker wrote:
> The HK_TYPE_DOMAIN housekeeping cpumask is now modifyable 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.
>
> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Shakeel Butt <shakeel.butt@linux.dev>
next prev parent reply other threads:[~2025-06-20 19:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250620152308.27492-1-frederic@kernel.org>
2025-06-20 15:22 ` [PATCH 06/27] mm: vmstat: Prepare to protect against concurrent isolated cpuset change Frederic Weisbecker
2025-06-20 15:22 ` [PATCH 12/27] cpu: Provide lockdep check for CPU hotplug lock write-held Frederic Weisbecker
2025-06-20 15:22 ` [PATCH 16/27] sched/isolation: Flush memcg workqueues on cpuset isolated partition change Frederic Weisbecker
2025-06-20 19:30 ` Shakeel Butt [this message]
2025-06-20 15:22 ` [PATCH 17/27] sched/isolation: Flush vmstat " Frederic Weisbecker
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