From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5FDB5C38A30 for ; Wed, 22 Apr 2020 06:42:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 30CEA2075A for ; Wed, 22 Apr 2020 06:42:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CUOUDClk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726569AbgDVGmQ (ORCPT ); Wed, 22 Apr 2020 02:42:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57720 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726110AbgDVGmP (ORCPT ); Wed, 22 Apr 2020 02:42:15 -0400 Received: from mail-pf1-x443.google.com (mail-pf1-x443.google.com [IPv6:2607:f8b0:4864:20::443]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9140FC03C1A6; Tue, 21 Apr 2020 23:42:15 -0700 (PDT) Received: by mail-pf1-x443.google.com with SMTP id d184so594001pfd.4; Tue, 21 Apr 2020 23:42:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Drc+56Q36eDpJcbMrcUJkfyYMbc4NMUbpx2Oj4m1kIA=; b=CUOUDClkinZimUWFeCOxuqvCFZL8oJ4l7+brBtc7xtSfkuDi8UsLA+VHKR4YMwKO8p nTywzbCpVQ7TjgRm20khS6C+SNQCruZOWGnqOuj/a8tv10tKQj7t1VUxfkSnU22gi/zI fR64Hpy+yb2ajCoVr8dBtKM84OyeQfsSxka9Uq8WLNa5NNMxZxDZ0n9bqHMHodAr6U5L 95QzwG7l8owtJHvhyDE7oZTAgtceuXBsps0jjvvRYx1zKLY4P7ExdGyVtdz3CplwRa8z L5J0PLgzizfm6wou7IZP9dqjV8T114XHK+SjsE4lXC35XKT+LMJ4J8u035kjiJ69yIEJ l6dg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=Drc+56Q36eDpJcbMrcUJkfyYMbc4NMUbpx2Oj4m1kIA=; b=jJfotcH2zD9of6+u5AYdfWC/ZnuHqRoPhxkJNM7/1RJdMVpMv9fBYkFQH6wlTmKu09 dJOFG7bYdyjZjnGAy5LHZoVh1q8JGMDbAoE78RFvNKo08c5IkTM40OB4fAEUdelzDMkf 7wslSyiMNLZGLtANfrdDxI/p26FLb298K/2Jgv4c11c77RYyfX/a5v3xCL2pqrPC/fn2 mcd0TrypUJKyKB/M2r2RzVKl277hfXrdqYty9lZ4NvXYtvXUh93IDUv2muUt6Cy9oGIE f5dvVC4Wg18CAwmDa9vxPcMv0G26zo+z8SltoksNB7yV9f4FV1Pl66XBZoKEoMUHoDmj 1mxw== X-Gm-Message-State: AGi0PuYDucSREtbuu//eXpuBsuGCrkbsi13lnQGL6PWpboeJ8STG5EaN OGW3eDZtpS9NyY6rDfEf6KI= X-Google-Smtp-Source: APiQypLtEtPtZdsmpKWeCmbaul3a9tV3vD6iMVWju5gPx0XndvMSFMVnpRQXvLt195I+J2jI7ab8tg== X-Received: by 2002:a65:4908:: with SMTP id p8mr24814442pgs.413.1587537735137; Tue, 21 Apr 2020 23:42:15 -0700 (PDT) Received: from js1304-desktop ([114.206.198.176]) by smtp.gmail.com with ESMTPSA id k10sm4467360pfa.163.2020.04.21.23.42.12 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 21 Apr 2020 23:42:14 -0700 (PDT) Date: Wed, 22 Apr 2020 15:42:09 +0900 From: Joonsoo Kim To: Johannes Weiner Cc: Alex Shi , Shakeel Butt , Hugh Dickins , Michal Hocko , "Kirill A. Shutemov" , Roman Gushchin , linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@fb.com Subject: Re: [PATCH 08/18] mm: memcontrol: prepare cgroup vmstat infrastructure for native anon counters Message-ID: <20200422064208.GH6780@js1304-desktop> References: <20200420221126.341272-1-hannes@cmpxchg.org> <20200420221126.341272-9-hannes@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200420221126.341272-9-hannes@cmpxchg.org> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 20, 2020 at 06:11:16PM -0400, Johannes Weiner wrote: > Anonymous compound pages can be mapped by ptes, which means that if we > want to track NR_MAPPED_ANON, NR_ANON_THPS on a per-cgroup basis, we > have to be prepared to see tail pages in our accounting functions. > > Make mod_lruvec_page_state() and lock_page_memcg() deal with tail > pages correctly, namely by redirecting to the head page which has the > page->mem_cgroup set up. > > Signed-off-by: Johannes Weiner Reviewed-by: Joonsoo Kim