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From: Shakeel Butt To: JP Kobryn Cc: Johannes Weiner , Andrew Morton , Tejun Heo , Michal Hocko , Roman Gushchin , Muchun Song , Vlastimil Babka , Alexei Starovoitov , Sebastian Andrzej Siewior , Michal =?utf-8?Q?Koutn=C3=BD?= , Harry Yoo , Yosry Ahmed , bpf@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Meta kernel team Subject: Re: [PATCH 2/3] cgroup: make css_rstat_updated nmi safe Message-ID: References: <20250609225611.3967338-1-shakeel.butt@linux.dev> <20250609225611.3967338-3-shakeel.butt@linux.dev> <9cf00007-f068-4ced-8977-f39a792eef6a@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9cf00007-f068-4ced-8977-f39a792eef6a@gmail.com> X-Migadu-Flow: FLOW_OUT X-Rspamd-Queue-Id: 15875140002 X-Rspamd-Server: rspam03 X-Rspam-User: X-Stat-Signature: 7j7cb86r1b6tqrt7wf3xx8cqpufiej9k X-HE-Tag: 1749650216-509806 X-HE-Meta: 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 0tGoIm3j J/t990PfHmPChON75AOplq0z3zQYfMfkrWa07E2PdgmsUeEOOUYJQVeQazCQlu5ZJV1yWWoD0U7uZJXdW9TpftvQA1NeYB8i1WYizNA+R7K1GPYuTiW+39IauDvdE4WJzSQyVhc5TyMHAzovYHuvCQhhSvBRzDOjxT9D7qEVzwccPkcXk/f+nlEZ0QYD8bU6u75JB0M3pHeMozYtN0CPXEaRUF3OQqKHZdcO901xtlVhrdyjJZNO0GGfp+fPjqQpDfTZGORpcLEuLbeE= 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 Tue, Jun 10, 2025 at 10:23:51PM -0700, JP Kobryn wrote: > > The subsystem per-cpu locks were used to synchronize updater and flusher > on a given cpu. Since you no longer use them on the updater side, it > seems these locks can be removed altogether. Indeed you are right, thanks for the suggestion.