From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail143.messagelabs.com (mail143.messagelabs.com [216.82.254.35]) by kanga.kvack.org (Postfix) with SMTP id 557296B0055 for ; Thu, 14 May 2009 19:37:33 -0400 (EDT) Received: from mt1.gw.fujitsu.co.jp ([10.0.50.74]) by fgwmail6.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id n4ENc6gH004838 for (envelope-from kosaki.motohiro@jp.fujitsu.com); Fri, 15 May 2009 08:38:06 +0900 Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 159A345DE55 for ; Fri, 15 May 2009 08:38:06 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id E907945DE53 for ; Fri, 15 May 2009 08:38:05 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id CE1CB1DB803F for ; Fri, 15 May 2009 08:38:05 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.249.87.104]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 7AD741DB803E for ; Fri, 15 May 2009 08:38:05 +0900 (JST) From: KOSAKI Motohiro Subject: Re: kernel BUG at mm/slqb.c:1411! In-Reply-To: <20090514175332.9B7B.A69D9226@jp.fujitsu.com> References: <1242289830.21646.5.camel@penberg-laptop> <20090514175332.9B7B.A69D9226@jp.fujitsu.com> Message-Id: <20090515083726.F5BF.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Date: Fri, 15 May 2009 08:38:04 +0900 (JST) Sender: owner-linux-mm@kvack.org To: KOSAKI Motohiro Cc: Pekka Enberg , Minchan Kim , linux-mm , LKML , Nick Piggin List-ID: > > On Wed, 2009-05-13 at 17:37 +0900, Minchan Kim wrote: > > > On Wed, 13 May 2009 16:42:37 +0900 (JST) > > > KOSAKI Motohiro wrote: > > > > > > Hmm. I don't know slqb well. > > > So, It's just my guess. > > > > > > We surely increase l->nr_partial in __slab_alloc_page. > > > In between l->nr_partial++ and call __cache_list_get_page, Who is decrease l->nr_partial again. > > > After all, __cache_list_get_page return NULL and hit the VM_BUG_ON. > > > > > > Comment said : > > > > > > /* Protects nr_partial, nr_slabs, and partial */ > > > spinlock_t page_lock; > > > > > > As comment is right, We have to hold the l->page_lock ? > > > > Makes sense. Nick? Motohiro-san, can you try this patch please? > > This issue is very rarely. please give me one night. -ENOTREPRODUCED I guess your patch is right fix. thanks! -- 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/ . Don't email: email@kvack.org