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Miller" , Eric Dumazet , Gabriele Monaco , Greg Kroah-Hartman , Ingo Molnar , Jakub Kicinski , Jens Axboe , Johannes Weiner , Lai Jiangshan , Marco Crivellari , Michal Hocko , Muchun Song , Paolo Abeni , Peter Zijlstra , Phil Auld , "Rafael J . Wysocki" , Roman Gushchin , Shakeel Butt , Simon Horman , Tejun Heo , Thomas Gleixner , Vlastimil Babka , Will Deacon , cgroups@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-mm@kvack.org, linux-pci@vger.kernel.org, netdev@vger.kernel.org Subject: Re: [PATCH 14/33] sched/isolation: Flush memcg workqueues on cpuset isolated partition change Message-ID: References: <20251013203146.10162-1-frederic@kernel.org> <20251013203146.10162-15-frederic@kernel.org> <364e084a-ef37-42ab-a2ae-5f103f1eb212@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <364e084a-ef37-42ab-a2ae-5f103f1eb212@redhat.com> X-Rspamd-Queue-Id: E399012000D X-Rspamd-Server: rspam07 X-Stat-Signature: zzaspef5a5habnz6b18eeb31hhghxdxm X-Rspam-User: X-HE-Tag: 1762359440-4983 X-HE-Meta: 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 zKPPCWep cN+L2RUtdAPazSZPF5QdBM/bR9lJWDnpsCSRxvvuhcyG4UHRhY0+SKR5Fo/pBXPEpOUe8oZSPcKPVVSEYAWY6QPbIDvEhoKN86JpDUhGscUT4gJc5gLbjSI5qDjE9FObZTD0qe6sV+Mw5gJxxAhaI8SxiAWCktjhuPFU1E+qSYHxX4UXQcFgLzqwerpdAJRudTLCMrHJoOP3ZzfP3O3+3phX1XcmLnQmzMGCyTfxI/0NM8uc= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Le Tue, Oct 21, 2025 at 03:16:45PM -0400, Waiman Long a écrit : > > @@ -5134,6 +5141,9 @@ int __init mem_cgroup_init(void) > > cpuhp_setup_state_nocalls(CPUHP_MM_MEMCQ_DEAD, "mm/memctrl:dead", NULL, > > memcg_hotplug_cpu_dead); > > + memcg_wq = alloc_workqueue("memcg", 0, 0); > > Should we explicitly mark the memcg_wq as WQ_PERCPU even though I think > percpu is the default. The schedule_work_on() schedules work on the > system_percpu_wq. Good catch, percpu is the default but that behaviour is scheduled for deprecation. I'm adding WQ_PERCPU. Thanks! -- Frederic Weisbecker SUSE Labs