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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 , Thomas Gleixner , Vlastimil Babka , Waiman Long , 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 03/33] memcg: Prepare to protect against concurrent isolated cpuset change Message-ID: References: <20251224134520.33231-1-frederic@kernel.org> <20251224134520.33231-4-frederic@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251224134520.33231-4-frederic@kernel.org> X-Rspam-User: X-Rspamd-Queue-Id: C920C20002 X-Rspamd-Server: rspam10 X-Stat-Signature: bogddiki6ozutogwharzs5cfhyfrsnqe X-HE-Tag: 1766793412-150448 X-HE-Meta: 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 Gh9u9Vbv Y3JULKRgK8FYcK6fnUJ53QXyigU6BFldsJ+PjetpjwnYWtLU/O1BgVV5iJWr0LvNCz96BZIupW2c2yXvjikoxWLv29DRnLBPP539I9O2BnCiYfN8s9SHIfkL0Oz+777pSvkDsTOrXkOE6ZR6hc2B2OvchRmYYEbH1/sukLPp016rXkFdTRHECtmBBncROgtgoke0gEmconRxMGyGM7s00ZG+Wsw== 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: On Wed, Dec 24, 2025 at 02:44:50PM +0100, Frederic Weisbecker wrote: > +static void schedule_drain_work(int cpu, struct work_struct *work) > +{ > + guard(rcu)(); > + if (!cpu_is_isolated(cpu)) > + schedule_work_on(cpu, work); > +} As the sync rules aren't trivial, it'd be nice to have some comment explaining what's going on. Thanks. -- tejun