Hi, On Tuesday, June 28, 2011, Vaidyanathan Srinivasan wrote: > Hi, > > I have random freezing failures on my laptop running 2.6.39 kernel. > The laptop has NFS client and automount. Network could have been > disconnected by the time suspend is attempted, hence nfs client should > fail all operations, just freeze and allow laptop to suspend. > > I need some help to drill deeper at this log and also suggestions on > config options to try and get more information to help me root cause > this issue. > > This happens once in 4-5 suspend/resume cycles, does not succeed on > retry, eventually I have to reboot. This is a tasks freezer failure, ie. the freezing of tasks fails, because one of them refuses to handle signals for 20 s. This is probably related to waiting on a VFS mutex in the TASK_UNINTERRUPTIBLE state. We don't handle those cases nicely right now, sorry about that. Thanks, Rafael > Linux kernel version 2.6.39-2.slh.1-aptosid-amd64 (debian) > > [15203.060847] PM: Syncing filesystems ... done. > [15203.224792] Freezing user space processes ... > [15223.230516] Freezing of tasks failed after 20.00 seconds (1 tasks refusing to freeze, wq_busy=0): > [15223.230551] man T 0000000000000002 0 6788 6765 0x00800004 > [15223.230557] ffff880037192760 0000000000000086 ffff88011823cc30 ffff88013328bb10 > [15223.230562] ffff88010bd83fd8 ffff88010bd83fd8 ffff88010bd83fd8 ffff880037192760 > [15223.230567] ffff8801332d5ac0 ffffffff8103cd7c ffff880037192760 ffff88012f8d5a88 > [15223.230571] Call Trace: > [15223.230581] [<ffffffff8103cd7c>] ? __wake_up_sync_key+0x4c/0x90 > [15223.230588] [<ffffffff8105b4f9>] ? do_notify_parent_cldstop+0x149/0x1b0 > [15223.230596] [<ffffffff810fb5c9>] ? kmem_cache_free+0x99/0xb0 > [15223.230600] [<ffffffff8105b767>] ? do_signal_stop+0xa7/0x1e0 > [15223.230604] [<ffffffff8105c74d>] ? get_signal_to_deliver+0xfd/0x3f0 > [15223.230609] [<ffffffff8100a114>] ? do_signal+0x84/0x7e0 > [15223.230614] [<ffffffff81033c28>] ? do_page_fault+0x198/0x440 > [15223.230619] [<ffffffff8104fb38>] ? do_wait+0x1d8/0x210 > [15223.230623] [<ffffffff81050dc5>] ? sys_wait4+0xa5/0x100 > [15223.230626] [<ffffffff8100a8f5>] ? do_notify_resume+0x65/0x90 > [15223.230630] [<ffffffff8104eab0>] ? delayed_put_task_struct+0x60/0x60 > [15223.230637] [<ffffffff813b4c60>] ? int_signal+0x12/0x17 > [15223.230640] pager T 0000000000000000 0 6799 6788 0x00800004 > [15223.230647] ffff880037196900 0000000000000086 ffff880037025200 ffff880133326f90 > [15223.230649] ffff88010487bfd8 ffff88010487bfd8 ffff88010487bfd8 ffff880037196900 > [15223.230651] ffff8801303318c0 ffffffff8103cd7c ffff880037196900 ffff8801332d62c8 > [15223.230653] Call Trace: > [15223.230655] [<ffffffff8103cd7c>] ? __wake_up_sync_key+0x4c/0x90 > [15223.230657] [<ffffffff8105b4f9>] ? do_notify_parent_cldstop+0x149/0x1b0 > [15223.230659] [<ffffffff810400d8>] ? check_preempt_wakeup+0x118/0x160 > [15223.230661] [<ffffffff810fb544>] ? kmem_cache_free+0x14/0xb0 > [15223.230663] [<ffffffff8105b767>] ? do_signal_stop+0xa7/0x1e0 > [15223.230665] [<ffffffff8105c74d>] ? get_signal_to_deliver+0xfd/0x3f0 > [15223.230667] [<ffffffff8100a114>] ? do_signal+0x84/0x7e0 > [15223.230669] [<ffffffff8105d312>] ? sys_kill+0x122/0x1d0 > [15223.230670] [<ffffffff8100a8f5>] ? do_notify_resume+0x65/0x90 > [15223.230672] [<ffffffff813b4c60>] ? int_signal+0x12/0x17 > [15223.230685] automount D 0000000000000003 0 15394 2438 0x00800004 > [15223.230688] ffff8800a0a83480 0000000000000082 0000000000000000 ffff8801183dc1a0 > [15223.230690] ffff88009c4e3fd8 ffff88009c4e3fd8 ffff88009c4e3fd8 ffff8800a0a83480 > [15223.230692] ffff88009c4e3ce0 ffff88010bf95001 ffff88009c4e3c5e ffffffff81113547 > [15223.230694] Call Trace: > [15223.230697] [<ffffffff81113547>] ? __follow_mount_rcu.isra.21+0x37/0xe0 > [15223.230703] [<ffffffff812b3b89>] ? kernel_sendmsg+0x39/0x50 > [15223.230722] [<ffffffffa059992a>] ? xs_send_kvec+0x8a/0x90 [sunrpc] > [15223.230727] [<ffffffffa059c3f0>] ? rpc_queue_empty+0x40/0x40 [sunrpc] > [15223.230732] [<ffffffffa059c40f>] ? rpc_wait_bit_killable+0x1f/0x40 [sunrpc] > [15223.230734] [<ffffffff813b253f>] ? __wait_on_bit+0x4f/0x80 > [15223.230738] [<ffffffffa059c3f0>] ? rpc_queue_empty+0x40/0x40 [sunrpc] > [15223.230740] [<ffffffff813b25ec>] ? out_of_line_wait_on_bit+0x7c/0xa0 > [15223.230744] [<ffffffff81068610>] ? autoremove_wake_function+0x30/0x30 > [15223.230748] [<ffffffffa059d0d4>] ? __rpc_execute+0xe4/0x2f0 [sunrpc] > [15223.230750] [<ffffffff810682d8>] ? wake_up_bit+0x18/0x40 > [15223.230754] [<ffffffffa0596299>] ? rpc_run_task+0x69/0x90 [sunrpc] > [15223.230757] [<ffffffffa05963cf>] ? rpc_call_sync+0x3f/0x70 [sunrpc] > [15223.230765] [<ffffffffa05f089c>] ? nfs3_rpc_wrapper.constprop.15+0x3c/0x60 [nfs] > [15223.230770] [<ffffffffa05f1c13>] ? nfs3_proc_getattr+0x43/0x90 [nfs] > [15223.230775] [<ffffffffa05e0d94>] ? __nfs_revalidate_inode+0x94/0x200 [nfs] > [15223.230780] [<ffffffffa05e1107>] ? nfs_getattr+0x57/0x110 [nfs] > [15223.230782] [<ffffffff8110c432>] ? vfs_fstatat+0x52/0x70 > [15223.230784] [<ffffffff8110c5c2>] ? sys_newlstat+0x12/0x30 > [15223.230787] [<ffffffff81125026>] ? mntput_no_expire+0x16/0xf0 > [15223.230790] [<ffffffff8110625f>] ? filp_close+0x5f/0x90 > [15223.230791] [<ffffffff8110633d>] ? sys_close+0xad/0x120 > [15223.230793] [<ffffffff813b4992>] ? system_call_fastpath+0x16/0x1b > [15223.230796] > [15223.230797] Restarting tasks ... done. > > Thanks, > Vaidy > > _______________________________________________ > linux-pm mailing list > linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx > https://lists.linux-foundation.org/mailman/listinfo/linux-pm > > _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
