From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f45.google.com (mail-pa0-f45.google.com [209.85.220.45]) by kanga.kvack.org (Postfix) with ESMTP id AA6DD6B0255 for ; Thu, 19 Nov 2015 05:10:45 -0500 (EST) Received: by padhx2 with SMTP id hx2so76822477pad.1 for ; Thu, 19 Nov 2015 02:10:45 -0800 (PST) Received: from mail-pa0-x22f.google.com (mail-pa0-x22f.google.com. [2607:f8b0:400e:c03::22f]) by mx.google.com with ESMTPS id fu6si10873314pac.175.2015.11.19.02.10.44 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 19 Nov 2015 02:10:44 -0800 (PST) Received: by pacdm15 with SMTP id dm15so76847450pac.3 for ; Thu, 19 Nov 2015 02:10:44 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 9.0 \(3094\)) Subject: Re: kernel oops on mmotm-2015-10-15-15-20 From: yalin wang In-Reply-To: <20151119065827.GA26601@node.shutemov.name> Date: Thu, 19 Nov 2015 18:10:37 +0800 Content-Transfer-Encoding: quoted-printable Message-Id: References: <20151105001922.GD7357@bbox> <20151108225522.GA29600@node.shutemov.name> <20151112003614.GA5235@bbox> <20151116014521.GA7973@bbox> <20151116084522.GA9778@node.shutemov.name> <20151116103220.GA32578@bbox> <20151116105452.GA10575@node.shutemov.name> <20151117073539.GB32578@bbox> <20151117093213.GA16243@node.shutemov.name> <20151119021221.GA15540@bbox> <20151119065827.GA26601@node.shutemov.name> Sender: owner-linux-mm@kvack.org List-ID: To: "Kirill A. Shutemov" Cc: Minchan Kim , Hugh Dickins , Sasha Levin , Andrew Morton , "open list:MEMORY MANAGEMENT" , linux-kernel , Rik van Riel , Mel Gorman , Michal Hocko , Johannes Weiner , Vlastimil Babka > On Nov 19, 2015, at 14:58, Kirill A. Shutemov = wrote: >=20 > uncharged i also encounter this crash , also i encounter a crash like this in qemu: [ 2.703436] [] = do_execveat_common.isra.36+0x4f0/0x630 [ 2.703624] [] do_execve+0x24/0x30 [ 2.703767] [] SyS_execve+0x1c/0x2c [ 2.703923] BUG: Bad page map in process init pte:6000004837ebd3 = pmd:b29e7003 [ 2.704140] page:ffffffc07f00af80 count:2 mapcount:-1 mapping: = (null) index:0x1 [ 2.704414] flags: 0x400000000014(referenced|dirty) [ 2.704563] page dumped because: bad pte [ 2.704666] addr:0000007fafb7e000 vm_flags:00100073 = anon_vma:ffffffc0729bdb90 mapping: (null) index:7fafb7e [ 2.704906] file: (null) fault: (null) mmap: = (null) readpage: (null) [ 2.705117] CPU: 0 PID: 84 Comm: init Tainted: G B = 4.2.0ajb-00005-g11a9bf3 #80 [ 2.705315] Hardware name: ranchu (DT) [ 2.705408] Call trace: [ 2.705488] [] dump_backtrace+0x0/0x124 [ 2.705657] [] show_stack+0x10/0x1c [ 2.705797] [] dump_stack+0x78/0x98 [ 2.705971] [] print_bad_pte+0x154/0x1f0 [ 2.706102] [] unmap_single_vma+0x574/0x704 [ 2.706236] [] unmap_vmas+0x54/0x70 [ 2.706354] [] exit_mmap+0x88/0xfc [ 2.706473] [] mmput+0x48/0xe8 [ 2.706584] [] flush_old_exec+0x30c/0x79c [ 2.706719] [] load_elf_binary+0x21c/0x1098 [ 2.706856] [] search_binary_handler+0xa8/0x224 [ 2.706995] [] = do_execveat_common.isra.36+0x4f0/0x630 [ 2.707144] [] do_execve+0x24/0x30 [ 2.707263] [] SyS_execve+0x1c/0x2c [ 2.707392] BUG: Bad page map in process init pte:6000004837fbd3 = pmd:b29e7003 [ 2.707752] page:ffffffc07f00afc0 count:2 mapcount:-1 mapping: = (null) index:0x1 [ 2.708167] flags: 0x400000000014(referenced|dirty) [ 2.708333] page dumped because: bad pte [ 2.708501] addr:0000007fafb7f000 vm_flags:00100073 = anon_vma:ffffffc0729bdb90 mapping: (null) index:7fafb7f [ 2.709084] file: (null) fault: (null) mmap: = (null) readpage: (null) [ 2.709306] CPU: 0 PID: 84 Comm: init Tainted: G B = 4.2.0ajb-00005-g11a9bf3 #80 [ 2.709494] Hardware name: ranchu (DT) seems the page map count is not correct .. i build is based on mmotm-2015-10-21-14-41 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