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[2620:137:e000::1:20]) by mx.google.com with ESMTP id i4-20020a17090332c400b00179f8a3f838si13135416plr.593.2023.01.18.03.11.50; Wed, 18 Jan 2023 03:11:56 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.com header.s=susede1 header.b="O7S/CVOF"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=suse.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229887AbjARKJj (ORCPT + 45 others); Wed, 18 Jan 2023 05:09:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43846 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229907AbjARKGW (ORCPT ); Wed, 18 Jan 2023 05:06:22 -0500 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0746169B37 for ; Wed, 18 Jan 2023 01:11:49 -0800 (PST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id BE1772100B; Wed, 18 Jan 2023 09:11:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1674033107; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=la4u3WiqNGgqLUtctuhYAtr33HCJU+/I+S10BLm4PPc=; b=O7S/CVOFTWYiA8k6/35NOCFBGDaxvc1jSO8BKF+G3vDuf0/+Pdm0UT41LCYNzXcKhXqrZG jFdMAbv3bkk2YbDIP0uK3qqGI39aomDfnVJUBPw2TD+TEt0lBYWG9XVbpixDESuO5HljM0 of4IJ3Qk0N9nzLLVoyrOBUut577kjnE= Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 25BF4139D2; Wed, 18 Jan 2023 09:11:47 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id NFTfBtO3x2NbLwAAMHmgww (envelope-from ); Wed, 18 Jan 2023 09:11:47 +0000 Date: Wed, 18 Jan 2023 10:11:46 +0100 From: Michal Hocko To: Minchan Kim Cc: Andrew Morton , Suren Baghdasaryan , Matthew Wilcox , linux-mm , LKML , SeongJae Park Subject: Re: [PATCH 3/3] mm: add vmstat statistics for madvise_[cold|pageout] Message-ID: References: <20230117231632.2734737-1-minchan@kernel.org> <20230117231632.2734737-3-minchan@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230117231632.2734737-3-minchan@kernel.org> X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS autolearn=ham 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 Tue 17-01-23 15:16:32, Minchan Kim wrote: > madvise LRU manipulation APIs need to scan address ranges to find > present pages at page table and provides advice hints for them. > > Likewise pg[scan/steal] count on vmstat, madvise_pg[scanned/hinted] > shows the proactive reclaim efficiency so this patch addes those > two statistics in vmstat. Please describe the usecase for those new counters. -- Michal Hocko SUSE Labs