From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail137.messagelabs.com (mail137.messagelabs.com [216.82.249.19]) by kanga.kvack.org (Postfix) with ESMTP id 274DD900225 for ; Fri, 24 Jun 2011 09:32:28 -0400 (EDT) Received: by pvc12 with SMTP id 12so2205258pvc.14 for ; Fri, 24 Jun 2011 06:32:22 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <20110624125131.GQ9396@suse.de> References: <4E0465D8.3080005@draigBrady.com> <20110624125131.GQ9396@suse.de> From: Andrew Lutomirski Date: Fri, 24 Jun 2011 09:32:01 -0400 Message-ID: Subject: Re: Root-causing kswapd spinning on Sandy Bridge laptops? Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: P?draig Brady , Minchan Kim , linux-mm@kvack.org On Fri, Jun 24, 2011 at 8:51 AM, Mel Gorman wrote: > On Fri, Jun 24, 2011 at 11:24:24AM +0100, P?draig Brady wrote: >> On 24/06/11 10:27, Minchan Kim wrote: >> > Hi Andrew, >> > >> > Sorry but right now I don't have a time to dive into this. >> > But it seems to be similar to the problem Mel is looking at. >> > Cced him. >> > >> > Even, P=E1draig Brady seem to have a reproducible scenario. >> > I will look when I have a time. >> > I hope I will be back sooner or later. >> >> My reproducer is (I've 3GB RAM, 1.5G swap): >> =A0 dd bs=3D1M count=3D3000 if=3D/dev/zero of=3Dspin.test >> >> To stop it spinning I just have to uncache the data, >> the handiest way being: >> =A0 rm spin.test >> >> To confirm, the top of the profile I posted is: >> =A0 i915_gem_object_bind_to_gtt >> =A0 =A0 shrink_slab >> > > I don't think it's an i915 bug. Another candidate fix in the other > thread that Padraig started. I bet you're right. I do indeed have a tiny high zone. (No clue why -- I have 2G of ram right now.) I won't be a reliable tester because I don't have a good way to reproduce this bug. --Andy -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org