From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id F418D900225 for ; Fri, 24 Jun 2011 08:15:36 -0400 (EDT) Message-ID: <4E047FD7.60004@draigBrady.com> Date: Fri, 24 Jun 2011 13:15:19 +0100 From: =?UTF-8?B?UMOhZHJhaWcgQnJhZHk=?= MIME-Version: 1.0 Subject: Re: Root-causing kswapd spinning on Sandy Bridge laptops? References: <4E0465D8.3080005@draigBrady.com> In-Reply-To: <4E0465D8.3080005@draigBrady.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Minchan Kim Cc: Andrew Lutomirski , linux-mm@kvack.org, Mel Gorman , KOSAKI Motohiro On 24/06/11 11:24, PA!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, PA!draig 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): > dd bs=1M count=3000 if=/dev/zero of=spin.test > > To stop it spinning I just have to uncache the data, > the handiest way being: > rm spin.test > > To confirm, the top of the profile I posted is: > i915_gem_object_bind_to_gtt > shrink_slab BTW I just tried this patch, but it didn't change anything. http://marc.info/?l=linux-kernel&m=130890263124399&w=2 cheers, PA!draig. -- 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