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=-5.5 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_MUTT 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 A8DBEC43381 for ; Mon, 11 Mar 2019 17:27:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7B5522063F for ; Mon, 11 Mar 2019 17:27:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=cmpxchg-org.20150623.gappssmtp.com header.i=@cmpxchg-org.20150623.gappssmtp.com header.b="NWdY7zDW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728106AbfCKR1O (ORCPT ); Mon, 11 Mar 2019 13:27:14 -0400 Received: from mail-yw1-f66.google.com ([209.85.161.66]:44756 "EHLO mail-yw1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727988AbfCKR1L (ORCPT ); Mon, 11 Mar 2019 13:27:11 -0400 Received: by mail-yw1-f66.google.com with SMTP id c4so4530291ywa.11 for ; Mon, 11 Mar 2019 10:27:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cmpxchg-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=Qz2LSTrCowWdInggZExDyZ73I7go08ROist2vGyWaAs=; b=NWdY7zDWCp8h9yZobxfgQ2nm/lUfyHtUSPWMw0WZPCqLMsiXwFFwG4vXXTFg0zM8h1 unavAhXD7dRhuHZJcZ3Jwcs0RjcXY8Mmgl2vHp+VAwVTXffG1I6t/tpSJSoxThbS8u6i LVtNP2btdhq77rK/oI0+3cwtBW1cTDHjD2Qq/UEVN6QWW9tfSZyHEDjcO8ch+mE2aefc dSPa581sRwD9Qr6UejYn4LR4YfjON0s1xyJ+yB8772cu9PrQJNW0nuf+pEKqR25k7nSd OpexzMRyvGlnhplgnBbl5kUzReJz+8fMl0ezJ21NRqkbG4DdzBuYCVLKiF3KETyQyjeY 8qpg== 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=Qz2LSTrCowWdInggZExDyZ73I7go08ROist2vGyWaAs=; b=C/R2gE1c/XJh5PZjj66iSRV8kQb68SnC3wiCm31ZqVt2l3kMSkZMzlMH70hAd5kZws OAWX8AgIVrqnJeOgw1zHSu1AX4sT5kLVxyPsDn329eacmcV7BfkSeF5f8He1NT9qsXWc 6/ODnZHP/A59T48LnnpoS7jtrbqJSO0IGppI/iHcxz7fstnDUylj9Hp51rr73+u6btue E6a4HztRC6sBvQpbhfal6Qk1d0/fHDyvj1JiopIgXnF9rDoE65VxLslG+BSGsaghoKjk etigceBfC+x0kF10Si/J+JwyQXRDHlr/+oX6Cl2eH8Q/OjL0ADofmUiFV/uo7g1UH03e dd8A== X-Gm-Message-State: APjAAAVYP7Eh2wv3bWXVCsQiP004mOndFbDP0cUOouU6D/n4CN9+JmvQ NuKHtmOkuQUVdRqSYcwvnoym+Q== X-Google-Smtp-Source: APXvYqyIB/mcNEO7gcVIKGHcUe3j33jfoK4LxvNW6DCh9WkpK2nTDMYfPZRFjTeFxP/5nIDj1ROi0w== X-Received: by 2002:a81:180b:: with SMTP id 11mr24926060ywy.431.1552325230276; Mon, 11 Mar 2019 10:27:10 -0700 (PDT) Received: from localhost ([2620:10d:c091:200::1:3c60]) by smtp.gmail.com with ESMTPSA id q7sm3187834ywl.68.2019.03.11.10.27.08 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 11 Mar 2019 10:27:09 -0700 (PDT) Date: Mon, 11 Mar 2019 13:27:08 -0400 From: Johannes Weiner To: Roman Gushchin Cc: linux-mm@kvack.org, kernel-team@fb.com, linux-kernel@vger.kernel.org, Tejun Heo , Rik van Riel , Michal Hocko , Roman Gushchin Subject: Re: [PATCH 4/5] mm: release per-node memcg percpu data prematurely Message-ID: <20190311172708.GD10823@cmpxchg.org> References: <20190307230033.31975-1-guro@fb.com> <20190307230033.31975-5-guro@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190307230033.31975-5-guro@fb.com> User-Agent: Mutt/1.11.3 (2019-02-01) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 07, 2019 at 03:00:32PM -0800, Roman Gushchin wrote: > Similar to memcg-level statistics, per-node data isn't expected > to be hot after cgroup removal. Switching over to atomics and > prematurely releasing percpu data helps to reduce the memory > footprint of dying cgroups. > > Signed-off-by: Roman Gushchin Acked-by: Johannes Weiner