From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail203.messagelabs.com (mail203.messagelabs.com [216.82.254.243]) by kanga.kvack.org (Postfix) with SMTP id 608C06B0189 for ; Tue, 21 Jun 2011 08:03:18 -0400 (EDT) Message-ID: <4E008784.80107@draigBrady.com> Date: Tue, 21 Jun 2011 12:59:00 +0100 From: =?ISO-8859-15?Q?P=E1draig_Brady?= MIME-Version: 1.0 Subject: Re: sandy bridge kswapd0 livelock with pagecache References: <4E0069FE.4000708@draigBrady.com> <20110621103920.GF9396@suse.de> <4E0076C7.4000809@draigBrady.com> <20110621113447.GG9396@suse.de> In-Reply-To: <20110621113447.GG9396@suse.de> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Mel Gorman Cc: linux-mm@kvack.org On 21/06/11 12:34, Mel Gorman wrote: > On Tue, Jun 21, 2011 at 11:47:35AM +0100, P?draig Brady wrote: >> On 21/06/11 11:39, Mel Gorman wrote: >>> On Tue, Jun 21, 2011 at 10:53:02AM +0100, P?draig Brady wrote: >>>> I tried the 2 patches here to no avail: >>>> http://marc.info/?l=linux-mm&m=130503811704830&w=2 >>>> >>>> I originally logged this at: >>>> https://bugzilla.redhat.com/show_bug.cgi?id=712019 >>>> >>>> I can compile up and quickly test any suggestions. >>>> >>> >>> I recently looked through what kswapd does and there are a number >>> of problem areas. Unfortunately, I haven't gotten around to doing >>> anything about it yet or running the test cases to see if they are >>> really problems. In your case, the following is a strong possibility >>> though. This should be applied on top of the two patches merged from >>> that thread. >>> >>> This is not tested in any way, based on 3.0-rc3 >> >> This does not fix the issue here. >> > > I made a silly mistake here. When you mentioned two patches applied, > I assumed you meant two patches that were finally merged from that > discussion thread instead of looking at your linked mail. Now that I > have checked, I think you applied the SLUB patches while the patches > I was thinking of are; > > [afc7e326: mm: vmscan: correct use of pgdat_balanced in sleeping_prematurely] > [f06590bd: mm: vmscan: correctly check if reclaimer should schedule during shrink_slab] > > The first one in particular has been reported by another user to fix > hangs related to copying large files. I'm assuming you are testing > against the Fedora kernel. As these patches were merged for 3.0-rc1, can > you check if applying just these two patches to your kernel helps? These patches are already present in my 2.6.38.8-32.fc15.x86_64 kernel :( cheers, Padraig. -- 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