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[209.85.220.65]) by mx.google.com with SMTPS id p137sor1062635ywg.173.2019.03.11.10.27.10 for (Google Transport Security); Mon, 11 Mar 2019 10:27:10 -0700 (PDT) Received-SPF: pass (google.com: domain of hannes@cmpxchg.org designates 209.85.220.65 as permitted sender) client-ip=209.85.220.65; Authentication-Results: mx.google.com; dkim=pass header.i=@cmpxchg-org.20150623.gappssmtp.com header.s=20150623 header.b=NWdY7zDW; spf=pass (google.com: domain of hannes@cmpxchg.org designates 209.85.220.65 as permitted sender) smtp.mailfrom=hannes@cmpxchg.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=cmpxchg.org 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-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) 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 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