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[109.81.31.43]) by smtp.gmail.com with UTF8SMTPSA id a640c23a62f3a-b29b80eaec6sm426411666b.87.2025.09.22.01.20.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Sep 2025 01:20:54 -0700 (PDT) Date: Mon, 22 Sep 2025 10:20:53 +0200 From: Michal Hocko To: xu.xin16@zte.com.cn Cc: akpm@linux-foundation.org, shakeel.butt@linux.dev, hannes@cmpxchg.org, roman.gushchin@linux.dev, david@redhat.com, chengming.zhou@linux.dev, muchun.song@linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org, cgroups@vger.kernel.org Subject: Re: [PATCH linux-next v3 0/6] memcg: Support per-memcg KSM metrics Message-ID: References: <20250921230726978agBBWNsPLi2hCp9Sxed1Y@zte.com.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250921230726978agBBWNsPLi2hCp9Sxed1Y@zte.com.cn> On Sun 21-09-25 23:07:26, xu.xin16@zte.com.cn wrote: > From: xu xin > > v2->v3: > ------ > Some fixes of compilation error due to missed inclusion of header or missed > function definition on some kernel config. > https://lore.kernel.org/all/202509142147.WQI0impC-lkp@intel.com/ > https://lore.kernel.org/all/202509142046.QatEaTQV-lkp@intel.com/ > > v1->v2: > ------ > According to Shakeel's suggestion, expose these metric item into memory.stat > instead of a new interface. > https://lore.kernel.org/all/ir2s6sqi6hrbz7ghmfngbif6fbgmswhqdljlntesurfl2xvmmv@yp3w2lqyipb5/ > > Background > ========== > > With the enablement of container-level KSM (e.g., via prctl [1]), there is > a growing demand for container-level observability of KSM behavior. However, > current cgroup implementations lack support for exposing KSM-related metrics. Could you be more specific why this is needed and what it will be used for? -- Michal Hocko SUSE Labs