From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-f197.google.com (mail-pf0-f197.google.com [209.85.192.197]) by kanga.kvack.org (Postfix) with ESMTP id 00C156B0038 for ; Mon, 15 May 2017 04:09:51 -0400 (EDT) Received: by mail-pf0-f197.google.com with SMTP id c6so97526469pfj.5 for ; Mon, 15 May 2017 01:09:50 -0700 (PDT) Received: from mx1.suse.de (mx2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id 33si9772014plk.81.2017.05.15.01.09.49 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 15 May 2017 01:09:50 -0700 (PDT) Date: Mon, 15 May 2017 10:09:46 +0200 From: Michal Hocko Subject: Re: 8 Gigabytes and constantly swapping Message-ID: <20170515080945.GA6062@dhcp22.suse.cz> References: <171e8fa1-3f14-dc18-09b5-48399b250a30@internode.on.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <171e8fa1-3f14-dc18-09b5-48399b250a30@internode.on.net> Sender: owner-linux-mm@kvack.org List-ID: To: Arthur Marsh Cc: linux-mm@kvack.org On Fri 12-05-17 18:21:27, Arthur Marsh wrote: > I've been building the Linus git head kernels as the source gets updated and > the one built about 3 hours ago managed to get stuck with kswapd0 as the > highest consumer of CPU cycles (but still under 1 percent) of processes > listed by top for over 15 minutes, after which I hit the power switch and > rebooted with a Debian 4.11.0 kernel. > > The previous kernel built less than 24 hours earlier did not have this > problem. > > CPU is an Athlon64 (Athlon II X4, 4 cores), RAM is 8GiB, swap is 4GiB, load > was mainly firefox and chromium. Opening a new window in chromium seemed to > help trigger the problem. > > It's not much information to go on, just wondered if anyone else had > experienced similar issues? > > I'm happy to supply more configuration information and run tests including > with kernels built with test patches applied. Is this 32b or 64b kernel? Could you take /proc/vmstat snapshots ever second while the kswapd is active? -- Michal Hocko SUSE Labs -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org