Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754463AbZD0IxQ (ORCPT ); Mon, 27 Apr 2009 04:53:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753097AbZD0Iw7 (ORCPT ); Mon, 27 Apr 2009 04:52:59 -0400 Received: from mail-bw0-f163.google.com ([209.85.218.163]:57669 "EHLO mail-bw0-f163.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752799AbZD0Iw6 convert rfc822-to-8bit (ORCPT ); Mon, 27 Apr 2009 04:52:58 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type :content-transfer-encoding; b=Kc35exUMCRGZZvKoJ+uioKjfZWGpknjhNHS1Og9sjR+ZKlSPjw5B5jvoRJyDD4ukOe pKHGemllLUV/0E2+9teIzWR0SkFQNlM/3O4A0mgmsLTAdhBhLOqncSPEKKoeCQCmVa1X 9MGD9c/Wdx5TwnSXEo2epwpPZO72EhT2V5x+I= MIME-Version: 1.0 In-Reply-To: References: Date: Mon, 27 Apr 2009 11:52:56 +0300 X-Google-Sender-Auth: f0f2beea58b8763e Message-ID: <84144f020904270152o6567e84cj914934120315bf90@mail.gmail.com> Subject: Re: [Bug #13112] Oops in drain_array From: Pekka Enberg To: David Rientjes Cc: Bart , Linux Kernel Mailing List , Kernel Testers List , "Rafael J. Wysocki" , Christoph Lameter , Andrew Morton Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1769 Lines: 40 On Sun, 26 Apr 2009, Rafael J. Wysocki wrote: >> This message has been generated automatically as a part of a report >> of regressions introduced between 2.6.28 and 2.6.29. >> >> The following bug entry is on the current list of known regressions >> introduced between 2.6.28 and 2.6.29. ?Please verify if it still should >> be listed and let me know (either way). >> >> >> Bug-Entry ? ? : http://bugzilla.kernel.org/show_bug.cgi?id=13112 >> Subject ? ? ? ? ? ? ? : Oops in drain_array >> Submitter ? ? : Bart >> Date ? ? ? ? ?: 2009-04-14 10:21 (13 days old) >> References ? ?: http://marc.info/?l=linux-kernel&m=123970493224628&w=4 On Sun, Apr 26, 2009 at 11:19 PM, David Rientjes wrote: > Bart, is it possible to try with CONFIG_DEBUG_SLAB enabled? Please also enable CONFIG_DEBUG_LIST. Looking at the oops: 18: 4a 8b 8c eb 68 01 00 mov 0x168(%rbx,%r13,8),%rcx # l3 = cachep->nodelists[node]; 1f: 00 20: 48 8b 16 mov (%rsi),%rdx 23: 48 8b 46 08 mov 0x8(%rsi),%rax 27: 48 89 42 08 mov %rax,0x8(%rdx) 2b:* 48 89 10 mov %rdx,(%rax) <-- trapping instruction 2e: 89 e8 mov %ebp,%eax 30: 48 c7 06 00 01 10 00 movq $0x100100,(%rsi) 37: 48 c7 46 08 00 02 20 movq $0x200200,0x8(%rsi) it seems like list_del() in free_block() explodes because because ->prev ("rax") of slab->list is bogus ("0000000000000cd0"). Pekka -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/