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 B8D778D003B for ; Tue, 19 Apr 2011 13:15:06 -0400 (EDT) Date: Tue, 19 Apr 2011 12:15:01 -0500 (CDT) From: Christoph Lameter Subject: Re: [PATCH v3] mm: make expand_downwards symmetrical to expand_upwards In-Reply-To: <1303233088.3171.26.camel@mulgrave.site> Message-ID: References: <20110415135144.GE8828@tiehlicka.suse.cz> <20110418100131.GD8925@tiehlicka.suse.cz> <20110418135637.5baac204.akpm@linux-foundation.org> <20110419111004.GE21689@tiehlicka.suse.cz> <1303228009.3171.18.camel@mulgrave.site> <1303233088.3171.26.camel@mulgrave.site> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: James Bottomley Cc: Pekka Enberg , Michal Hocko , Andrew Morton , Hugh Dickins , linux-mm@kvack.org, LKML , linux-parisc@vger.kernel.org, David Rientjes On Tue, 19 Apr 2011, James Bottomley wrote: > On Tue, 2011-04-19 at 20:05 +0300, Pekka Enberg wrote: > > > It seems to be a random intermittent mm crash because the next reboot > > > crashed with the same trace but after the fsck had completed and the > > > third came up to the login prompt. > > > > Looks like a genuine SLUB problem on parisc. Christoph? > > Looking through the slub code, it seems to be making invalid > assumptions. All of the node stuff is dependent on CONFIG_NUMA. > However, we're CONFIG_DISCONTIGMEM (with CONFIG_NUMA not set): on the > machines I and Dave Anglin have, our physical memory ranges are 0-1GB > and 64-65GB, so I think slub crashes when we get a page from the high > memory range ... because it's not expecting a non-zero node number. Right !NUMA systems only have node 0. -- 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