Bug 182491

Summary:	Strange Kernel Errors (hungcheck timer) caused by KDE 4.2 apps
Product:	[Unmaintained] kdelibs	Reporter:	Alex <allo>
Component:	general	Assignee:	kdelibs bugs <kdelibs-bugs-null>
Status:	RESOLVED FIXED
Severity:	crash	CC:	grundleborg
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Debian testing
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Alex 2009-01-30 21:54:21 UTC

Version:            (using KDE 4.2.0)
OS:                Linux
Installed from:    Debian testing/unstable Packages

With KDE 4.2 on Debian lenny with experimental packages for KDE 4.2 i get kernel errors (hungcheck timer) in plasma, dolphin, ksnapshot, krunner, etc. on a regular basis. The Problem is, the hanging process cannot be killed (even kill -9) and as it is still "running" i cannot restart it. so i need to reboot to use the application again.

Kernellog:
[... many more than the last three ...]
[11169.063379] INFO: task lancelot:5644 blocked for more than 120 seconds.
[11169.063390] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[11169.063396] lancelot      D ffff81007432c810     0  5644      1
[11169.063405]  ffff810074331b20 0000000000000082 ffffffff8024a85e ffffffff8061f980
[11169.063415]  ffff81007432c810 ffff810074c84810 ffff81007432ca98 00000001000021c5
[11169.063423]  000000001b85df5e ffff810074331b18 ffffffff80228f23 ffff810001021800
[11169.063431] Call Trace:
[11169.063469]  [<ffffffff8024a85e>] ktime_get_ts+0x22/0x4b
[11169.063514]  [<ffffffff80228f23>] hrtick_start_fair+0xfb/0x144
[11169.063571]  [<ffffffff804229c7>] __mutex_lock_slowpath+0x64/0x9b
[11169.063615]  [<ffffffff8042282c>] mutex_lock+0xa/0xb
[11169.063621]  [<ffffffff802c9cb8>] inotify_poll+0x31/0x50
[11169.063644]  [<ffffffff802ad186>] do_sys_poll+0x18c/0x323
[11169.063674]  [<ffffffff802adcfe>] __pollwait+0x0/0xe1
[11169.063723]  [<ffffffff8022a865>] __wake_up_sync+0x3a/0x56
[11169.063778]  [<ffffffff803a9bf6>] skb_dequeue+0x50/0x58
[11169.063801]  [<ffffffff8040e6fb>] unix_stream_recvmsg+0x43d/0x4ec
[11169.065695]  [<ffffffff803a3be6>] sock_aio_read+0xdd/0xec
[11169.065804]  [<ffffffff802a0b8b>] do_sync_read+0xc9/0x10c
[11169.065880]  [<ffffffff80247be5>] autoremove_wake_function+0x0/0x2e
[11169.066041]  [<ffffffff802ad352>] sys_poll+0x35/0x81
[11169.066074]  [<ffffffff8020bffa>] system_call_after_swapgs+0x8a/0x8f
[11169.066153] 
[11169.066161] INFO: task krunner:5675 blocked for more than 120 seconds.
[11169.066166] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[11169.066171] krunner       D ffff81007a963050     0  5675      1
[11169.066178]  ffff8100600fbc60 0000000000000086 ffff8100600fbc28 ffffffff8022b2a7
[11169.066187]  ffff81007a963050 ffff810077ce77d0 ffff81007a9632d8 00000000602b1dc0
[11169.066195]  ffff810000000000 00000000000004ca 00000000ffffffff 0000000000000000
[11169.066202] Call Trace:
[11169.066224]  [<ffffffff8022b2a7>] default_wake_function+0x0/0xe
[11169.066311]  [<ffffffff804229c7>] __mutex_lock_slowpath+0x64/0x9b
[11169.066354]  [<ffffffff8042282c>] mutex_lock+0xa/0xb
[11169.066360]  [<ffffffff802a7e26>] do_lookup+0xa3/0x1dd
[11169.066413]  [<ffffffff802a9fa3>] __link_path_walk+0x948/0xddd
[11169.066572]  [<ffffffff802aa47e>] path_walk+0x46/0x8b
[11169.066617]  [<ffffffff802aa7aa>] do_path_lookup+0x158/0x1d0
[11169.066628]  [<ffffffff802a94c2>] getname+0xb5/0x11c
[11169.066660]  [<ffffffff802ab11a>] __user_walk_fd+0x37/0x4c
[11169.066692]  [<ffffffff802a40bd>] vfs_stat_fd+0x1b/0x4a
[11169.066746]  [<ffffffff802c9e3e>] inotify_read+0x167/0x197
[11169.066773]  [<ffffffff80247be5>] autoremove_wake_function+0x0/0x2e
[11169.066811]  [<ffffffff802a4148>] sys_newstat+0x19/0x31
[11169.066833]  [<ffffffff802a13cf>] vfs_read+0x11e/0x152
[11169.066866]  [<ffffffff802a17ac>] sys_read+0x64/0xc2
[11169.066909]  [<ffffffff8020bffa>] system_call_after_swapgs+0x8a/0x8f
[11169.066988] 
[11169.067000] INFO: task kmail:8073 blocked for more than 120 seconds.
[11169.067004] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[11169.067009] kmail         D ffff81007a3157d0     0  8073      1
[11169.067016]  ffff810041d43cc0 0000000000000086 ffffffffa0184952 ffff810000000001
[11169.067025]  ffff81007a3157d0 ffff81007a963050 ffff81007a315a58 0000000000000001
[11169.067033]  ffffffff80247b0f 0000000000001000 0000000000000002 0000000000000000
[11169.067040] Call Trace:
[11169.067076]  [<ffffffffa0184952>] :ext3:ext3_getblk+0xa8/0x188
[11169.067109]  [<ffffffff80247b0f>] bit_waitqueue+0x10/0x97
[11169.067130]  [<ffffffff80247bd4>] wake_up_bit+0x11/0x22
[11169.067169]  [<ffffffff804229c7>] __mutex_lock_slowpath+0x64/0x9b
[11169.067212]  [<ffffffff8042282c>] mutex_lock+0xa/0xb
[11169.067218]  [<ffffffff802c9195>] inotify_inode_is_dead+0x20/0x83
[11169.067261]  [<ffffffff802b06c8>] dentry_iput+0x60/0x9d
[11169.067283]  [<ffffffff802b079f>] d_kill+0x38/0x59
[11169.067304]  [<ffffffff802b198c>] dput+0x119/0x14f
[11169.067326]  [<ffffffff802a7ab7>] path_put+0xd/0x27
[11169.067336]  [<ffffffff802c9392>] put_inotify_watch+0x2a/0x66
[11169.067358]  [<ffffffff802c9b11>] inotify_dev_queue_event+0x45/0x12b
[11169.067403]  [<ffffffff802c91c4>] inotify_inode_is_dead+0x4f/0x83
[11169.067446]  [<ffffffff802b06c8>] dentry_iput+0x60/0x9d
[11169.067468]  [<ffffffff802b2c83>] d_delete+0x49/0xb2
[11169.067489]  [<ffffffff802a8ffd>] vfs_unlink+0xc9/0xef
[11169.067511]  [<ffffffff802aabfa>] do_unlinkat+0xbb/0x160
[11169.067566]  [<ffffffff80311a37>] __up_write+0x21/0x10e
[11169.067642]  [<ffffffff8020bffa>] system_call_after_swapgs+0x8a/0x8f
[11169.067721]

Comment 1 George Goldberg 2009-04-07 23:07:18 UTC

Reassigning to kdelibs. Hopefully someone who knows about this kind of thing will see it there.

Comment 2 Alex 2010-02-18 18:38:35 UTC

works for me with recent kernel and kde 4.4