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[2603:800c:1a02:1bae:a7fa:157f:969a:4cde]) by smtp.gmail.com with ESMTPSA id 13-20020a170902c10d00b00176acd80f69sm14609625pli.102.2022.11.23.11.07.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Nov 2022 11:07:34 -0800 (PST) Sender: Tejun Heo Date: Wed, 23 Nov 2022 09:07:33 -1000 From: Tejun Heo To: Waiman Long Cc: "haifeng.xu" , lizefan.x@bytedance.com, hannes@cmpxchg.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] cgroup/cpuset: Optimize update_tasks_nodemask() Message-ID: References: <20221123082157.71326-1-haifeng.xu@shopee.com> <5fccf438-fdbe-1bc8-6460-b3911cc51566@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 23, 2022 at 02:05:59PM -0500, Waiman Long wrote: > Right, the group leader is just a marker to make it easier to avoid > duplicating the work for the same mm. If the group leader happens to be in > another cpuset, it will suffer some performance consequence. Yeah, I guess that's gonna be good enough for most cases. Thanks. -- tejun