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Wed, 24 Aug 2022 10:12:05 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id uxj+HnX5BWO+FAAAMHmgww (envelope-from ); Wed, 24 Aug 2022 10:12:05 +0000 Date: Wed, 24 Aug 2022 12:12:04 +0200 From: Michal Hocko To: Liu Shixin Cc: Andrew Morton , Greg Kroah-Hartman , huang ying , Aaron Lu , Dave Hansen , Jesper Dangaard Brouer , Vlastimil Babka , Kemi Wang , Kefeng Wang , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH -next v2] mm, proc: collect percpu free pages into the free pages Message-ID: References: <20220822023311.909316-1-liushixin2@huawei.com> <20220822033354.952849-1-liushixin2@huawei.com> <20220822141207.24ff7252913a62f80ea55e90@linux-foundation.org> <6b2977fc-1e4a-f3d4-db24-7c4699e0773f@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=suse.com header.s=susede1 header.b=Pz9YrIBk; 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dkim=pass header.d=suse.com header.s=susede1 header.b=Pz9YrIBk; spf=pass (imf17.hostedemail.com: domain of mhocko@suse.com designates 195.135.220.29 as permitted sender) smtp.mailfrom=mhocko@suse.com; dmarc=pass (policy=quarantine) header.from=suse.com X-Rspam-User: X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: D4B514001D X-Stat-Signature: f1j6yb51ua49ckg8f37dfenzopbjmnat X-HE-Tag: 1661335926-946559 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: On Wed 24-08-22 18:05:58, Liu Shixin wrote: [...] > But since these memory is also free memory that can be uesd and is large, I think we > should still provide a statistic for the user. Perhaps add a new statistic is better? Well, if somebody is really interested then /proc/zoneinfo gives a very detailed insight into pcp usage. -- Michal Hocko SUSE Labs