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=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham 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 5CEF8C282C7 for ; Sat, 26 Jan 2019 20:00:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 348DC2184C for ; Sat, 26 Jan 2019 20:00:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726468AbfAZUAI (ORCPT ); Sat, 26 Jan 2019 15:00:08 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:52746 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726344AbfAZUAI (ORCPT ); Sat, 26 Jan 2019 15:00:08 -0500 Received: by atrey.karlin.mff.cuni.cz (Postfix, from userid 512) id 37D27806A4; Sat, 26 Jan 2019 20:59:59 +0100 (CET) Date: Sat, 26 Jan 2019 21:00:05 +0100 From: Pavel Machek To: kernel list , Andrew Morton Cc: mgorman@techsingularity.net, vbabka@suse.cz, aarcange@redhat.com, rientjes@google.com, mhocko@kernel.org, zi.yan@cs.rutgers.edu, hannes@cmpxchg.org Subject: [regression -next0117] What is kcompactd and why is he eating 100% of my cpu? Message-ID: <20190126200005.GB27513@amd> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="oC1+HKm2/end4ao3" Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --oC1+HKm2/end4ao3 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi! With modern web, 100% CPU load is no longer uncommon, but this time chromium is not to blame: pavel@amd:/data/l/linux-next-32$ uname -a Linux amd 5.0.0-rc2-next-20190117 #214 SMP Fri Jan 18 09:47:18 CET 2019 i686 GNU/Linux top - 13:38:51 up 1:42, 16 users, load average: 1.41, 1.93, 1.62 Tasks: 182 total, 3 running, 138 sleeping, 0 stopped, 0 zombie %Cpu(s): 2.3 us, 57.8 sy, 0.0 ni, 39.9 id, 0.0 wa, 0.0 hi, 0.0 si, 0.= 0 st KiB Mem: 3020044 total, 2429420 used, 590624 free, 27468 buffers KiB Swap: 2097148 total, 0 used, 2097148 free. 1924268 cached Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND= =20 608 root 20 0 0 0 0 R 99.6 0.0 11:34.38 kcompac= td0 =20 9782 root 20 0 0 0 0 I 7.9 0.0 0:59.02 kworker= /0:+=20 2971 root 20 0 46624 23076 13576 S 4.3 0.8 2:50.22 Xorg = =20 --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --oC1+HKm2/end4ao3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlxMvEUACgkQMOfwapXb+vLv5wCgjfsg3TwUQr5iPZOrTadrfScE Zq8AoKP6Vkqll/8NR34+7Qe3fyMakhDX =OH2y -----END PGP SIGNATURE----- --oC1+HKm2/end4ao3--