From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yk0-f178.google.com (mail-yk0-f178.google.com [209.85.160.178]) by kanga.kvack.org (Postfix) with ESMTP id B903C6B0037 for ; Mon, 3 Feb 2014 22:02:14 -0500 (EST) Received: by mail-yk0-f178.google.com with SMTP id 79so44469394ykr.9 for ; Mon, 03 Feb 2014 19:02:14 -0800 (PST) Received: from userp1040.oracle.com (userp1040.oracle.com. [156.151.31.81]) by mx.google.com with ESMTPS id t26si18639626yhl.255.2014.02.03.19.02.14 for (version=TLSv1 cipher=RC4-SHA bits=128/128); Mon, 03 Feb 2014 19:02:14 -0800 (PST) Message-ID: <52F05827.1040401@oracle.com> Date: Mon, 03 Feb 2014 22:01:59 -0500 From: Sasha Levin MIME-Version: 1.0 Subject: Re: mm: BUG in do_huge_pmd_wp_page References: <51559150.3040407@oracle.com> <20130410080202.GB21292@blaptop> <5166CEDD.9050301@oracle.com> <20130411151323.89D40E0085@blue.fi.intel.com> <5166D355.2060103@oracle.com> <20130424154607.60e9b9895539eb5668d2f505@linux-foundation.org> <5179CF8F.7000702@oracle.com> <20130426020101.GA21162@redhat.com> In-Reply-To: <20130426020101.GA21162@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Dave Jones , Andrew Morton , "Kirill A. Shutemov" , Minchan Kim , David Rientjes , Andrea Arcangeli , "H. Peter Anvin" , Mel Gorman , linux-mm , "linux-kernel@vger.kernel.org" On 04/25/2013 10:01 PM, Dave Jones wrote: > On Thu, Apr 25, 2013 at 08:51:27PM -0400, Sasha Levin wrote: > > On 04/24/2013 06:46 PM, Andrew Morton wrote: > > > Guys, did this get fixed? > > > > I've stopped seeing that during fuzzing, so I guess that it got fixed somehow... > > We've had reports of users hitting this in 3.8 > > eg: > https://bugzilla.redhat.com/show_bug.cgi?id=947985 > https://bugzilla.redhat.com/show_bug.cgi?id=956730 > > I'm sure there are other reports of it too. > > Would be good if we can figure out what fixed it (if it is actually fixed) > for backporting to stable It's been a while (7 months?), but this one is back... Just hit it again with today's -next: [ 762.701278] BUG: unable to handle kernel paging request at ffff88009eae6000 [ 762.702462] IP: [] copy_page_rep+0x5/0x10 [ 762.703369] PGD 84bb067 PUD 22fa81067 PMD 22f98b067 PTE 800000009eae6060 [ 762.704411] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 762.705873] Dumping ftrace buffer: [ 762.707606] (ftrace buffer empty) [ 762.708311] Modules linked in: [ 762.708762] CPU: 16 PID: 17920 Comm: trinity-c16 Tainted: G W 3.13.0-next-2 0140203-sasha-00007-gf4985e2 #23 [ 762.710135] task: ffff8801ac358000 ti: ffff880199234000 task.ti: ffff880199234000 [ 762.710135] RIP: 0010:[] [] copy_page_rep+0x5/0x 10 [ 762.710135] RSP: 0018:ffff880199235c90 EFLAGS: 00010286 [ 762.710135] RAX: 0000000080000002 RBX: 00000000056db980 RCX: 0000000000000200 [ 762.710135] RDX: ffff8801ac358000 RSI: ffff88009eae6000 RDI: ffff88015b6e6000 [ 762.710135] RBP: ffff880199235cd8 R08: 0000000000000000 R09: 0000000000000000 [ 762.710135] R10: 0000000000000001 R11: 0000000000000000 R12: 00000000027ab980 [ 762.710135] R13: 0000000000000200 R14: 00000000000000e6 R15: ffff880000000000 [ 762.710135] FS: 00007fb0804e1700(0000) GS:ffff88003da00000(0000) knlGS:0000000000000 000 [ 762.710135] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 762.710135] CR2: ffff88009eae6000 CR3: 0000000199225000 CR4: 00000000000006e0 [ 762.710135] Stack: [ 762.710135] ffffffff81298995 ffff8801a841ae00 ffff88003d084520 ffff880199227090 [ 762.710135] 800000009ea008e5 ffff8801a841ae00 ffffea00027a8000 ffff880199227090 [ 762.710135] ffffea00056d8000 ffff880199235d58 ffffffff812d7260 ffff880199235cf8 [ 762.710135] Call Trace: [ 762.710135] [] ? copy_user_huge_page+0x1a5/0x210 [ 762.710135] [] do_huge_pmd_wp_page+0x3d0/0x650 [ 762.710135] [] ? put_lock_stats+0xe/0x30 [ 762.710135] [] __handle_mm_fault+0x2b1/0x3d0 [ 762.710135] [] handle_mm_fault+0x133/0x1c0 [ 762.710135] [] __get_user_pages+0x438/0x630 [ 762.710135] [] ? put_lock_stats+0xe/0x30 [ 762.710135] [] __mlock_vma_pages_range+0xd4/0xe0 [ 762.710135] [] __mm_populate+0x110/0x190 [ 762.710135] [] SyS_mlockall+0x160/0x1b0 [ 762.710135] [] tracesys+0xdd/0xe2 [ 762.710135] Code: 90 90 90 90 90 90 9c fa 65 48 3b 06 75 14 65 48 3b 56 08 75 0d 65 48 89 1e 65 48 89 4e 08 9d b0 01 c3 9d 30 c0 c3 b9 00 02 00 00 48 a5 c3 0f 1f 80 00 00 00 00 eb ee 66 66 66 90 66 66 66 90 [ 762.710135] RIP [] copy_page_rep+0x5/0x10 [ 762.710135] RSP [ 762.710135] CR2: ffff88009eae6000 Thanks, Sasha -- 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