Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756698Ab3DAMGX (ORCPT ); Mon, 1 Apr 2013 08:06:23 -0400 Received: from mail-ea0-f172.google.com ([209.85.215.172]:54284 "EHLO mail-ea0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751846Ab3DAMGV (ORCPT ); Mon, 1 Apr 2013 08:06:21 -0400 MIME-Version: 1.0 In-Reply-To: <31775765.508251364807825241.JavaMail.weblogic@epml02> References: <31775765.508251364807825241.JavaMail.weblogic@epml02> Date: Mon, 1 Apr 2013 05:06:20 -0700 Message-ID: Subject: Re: [3.9-rc5] INFO: task umount:29671 blocked for more than 120 seconds From: Anatol Pomozov To: jongman.heo@samsung.com, Guo Chao Cc: LKML Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3982 Lines: 66 +Guo Chao who fixed similar bug recently On Mon, Apr 1, 2013 at 2:17 AM, Jongman Heo wrote: > > Hi guys, > > I hit following warning with 3.9-rc5, during unmount (the device was mounted via loop device, in case it matters). > > Jongman. > > [ 3600.583547] INFO: task umount:29671 blocked for more than 120 seconds. > [ 3600.583552] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [ 3600.583555] umount D 0000000000000001 0 29671 29632 0x00000000 > [ 3600.583561] ffff88011ecb5c98 0000000000000086 ffff880130ccade0 0000000000013e40 > [ 3600.583566] ffff88011ecb5fd8 ffff88011ecb4010 0000000000013e40 0000000000013e40 > [ 3600.583571] ffff88011ecb5fd8 0000000000013e40 ffff880132518000 ffff880130ccade0 > [ 3600.583575] Call Trace: > [ 3600.583583] [] schedule+0x29/0x70 > [ 3600.583589] [] schedule_preempt_disabled+0xe/0x10 > [ 3600.583593] [] __mutex_lock_slowpath+0xdf/0x160 > [ 3600.583598] [] ? release_sysfs_dirent+0x7e/0x100 > [ 3600.583603] [] mutex_lock+0x2b/0x50 > [ 3600.583607] [] loop_clr_fd+0x24a/0x2e0 > [ 3600.583612] [] ? _raw_spin_lock+0xe/0x20 > [ 3600.583617] [] lo_release+0x78/0x90 > [ 3600.583622] [] __blkdev_put+0x194/0x1d0 > [ 3600.583628] [] blkdev_put+0x5d/0x160 > [ 3600.583633] [] kill_block_super+0x4d/0x80 > [ 3600.583638] [] deactivate_locked_super+0x45/0x70 > [ 3600.583643] [] deactivate_super+0x4a/0x70 > [ 3600.583648] [] mntput_no_expire+0xf8/0x150 > [ 3600.583653] [] sys_umount+0xcd/0x3e0 > [ 3600.583659] [] system_call_fastpath+0x16/0x1b > [ 3600.583663] INFO: task blkid:29673 blocked for more than 120 seconds. > [ 3600.583665] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [ 3600.583667] blkid D ffffffff81807f20 0 29673 1 0x00000000 > [ 3600.583672] ffff88011338fa88 0000000000000082 ffff880130ccc4d0 0000000000013e40 > [ 3600.583677] ffff88011338ffd8 ffff88011338e010 0000000000013e40 0000000000013e40 > [ 3600.583681] ffff88011338ffd8 0000000000013e40 ffff880132b416f0 ffff880130ccc4d0 > [ 3600.583686] Call Trace: > [ 3600.583691] [] schedule+0x29/0x70 > [ 3600.583695] [] schedule_preempt_disabled+0xe/0x10 > [ 3600.583700] [] __mutex_lock_slowpath+0xdf/0x160 > [ 3600.583704] [] mutex_lock+0x2b/0x50 > [ 3600.583709] [] __blkdev_get+0x73/0x480 > [ 3600.583714] [] ? blkdev_get+0x360/0x360 > [ 3600.583719] [] blkdev_get+0x51/0x360 > [ 3600.583724] [] ? _raw_spin_lock+0xe/0x20 > [ 3600.583729] [] ? blkdev_get+0x360/0x360 > [ 3600.583734] [] blkdev_open+0x62/0x80 > [ 3600.583739] [] do_dentry_open+0x23e/0x2c0 > [ 3600.583743] [] finish_open+0x35/0x50 > [ 3600.583748] [] do_last+0x696/0xe50 > [ 3600.583752] [] ? kmem_cache_alloc_trace+0xc4/0x120 > [ 3600.583757] [] path_openat+0xb8/0x490 > [ 3600.583762] [] do_filp_open+0x49/0xa0 > [ 3600.583767] [] ? _raw_spin_lock+0xe/0x20 > [ 3600.583772] [] ? __alloc_fd+0xb5/0x160 > [ 3600.583777] [] do_sys_open+0x108/0x1f0 > [ 3600.583781] [] sys_open+0x21/0x30 > [ 3600.583786] [] system_call_fastpath+0x16/0x1b -- 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/