I have been experiencing this issue on 2.6.35-rc3 when a bunch of kernel debug options are enabled - let me know if you'd like the .config (tuned for an Intel desktop board). It reproduces reliably usually within an hour of activity and we get a similar signature [1] to other reports.
Commit e552eb7038a36d9b18860f525aa02875e313fe16 doesn't seem to address the issue, as this commit was introduced in 2.6.34.
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INFO: task i915:774 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
I have been experiencing this issue on 2.6.35-rc3 when a bunch of kernel debug options are enabled - let me know if you'd like the .config (tuned for an Intel desktop board). It reproduces reliably usually within an hour of activity and we get a similar signature [1] to other reports.
Commit e552eb7038a36d9 b18860f525aa028 75e313fe16 doesn't seem to address the issue, as this commit was introduced in 2.6.34.
--- [1]
INFO: task i915:774 blocked for more than 120 seconds.
"echo 0 > /proc/sys/ kernel/ hung_task_ timeout_ secs" disables this message.
i915 D ffff88010f0ba610 6280 774 2 0x00000000
ffff88010f22dcb0 0000000000000086 ffff88010e742a00 ffff88010f0ba610
ffff88010f22dfd8 00000000001d4440 ffff88010f22dfd8 ffff88010f0ba610
00000000001d4440 00000000001d4440 ffff88010f22dfd8 00000000001d4440
Call Trace:
[<ffffffff813a 41ba>] ? intel_idle_ update+ 0x4a/0x220
[<ffffffff8164 25fa>] mutex_lock_ nested+ 0x1ea/0x4c0
[<ffffffff813a 41ba>] ? intel_idle_ update+ 0x4a/0x220
[<ffffffff813a 41ba>] ? intel_idle_ update+ 0x4a/0x220
[<ffffffff8164 4d03>] ? _raw_spin_ unlock_ irqrestore+ 0x53/0xa0
[<ffffffff813a 4170>] ? intel_idle_ update+ 0x0/0x220
[<ffffffff813a 41ba>] intel_idle_ update+ 0x4a/0x220
[<ffffffff813a 4170>] ? intel_idle_ update+ 0x0/0x220
[<ffffffff8106 9b20>] worker_ thread+ 0x220/0x390
[<ffffffff8106 9ace>] ? worker_ thread+ 0x1ce/0x390
[<ffffffff8108 475d>] ? trace_hardirqs_ on+0xd/ 0x10
[<ffffffff8106 eb70>] ? autoremove_ wake_function+ 0x0/0x40
[<ffffffff8106 9900>] ? worker_ thread+ 0x0/0x390
[<ffffffff8106 e65e>] kthread+0xae/0xc0
[<ffffffff8100 4024>] kernel_ thread_ helper+ 0x4/0x10
[<ffffffff8164 5114>] ? restore_ args+0x0/ 0x30
[<ffffffff8106 e5b0>] ? kthread+0x0/0xc0
[<ffffffff8100 4020>] ? kernel_ thread_ helper+ 0x0/0x10
INFO: lockdep is turned off.
INFO: task Xorg:2004 blocked for more than 120 seconds.
"echo 0 > /proc/sys/ kernel/ hung_task_ timeout_ secs" disables this message.
Xorg D ffffffff8180a360 4608 2004 1936 0x00400004
ffff8801112d5c58 0000000000000086 ffff8801112d5bd8 ffffffffffffffff
ffff8801112d5fd8 00000000001d4440 ffff8801112d5fd8 ffff8801078f0000
00000000001d4440 00000000001d4440 ffff8801112d5fd8 00000000001d4440
Call Trace:
[<ffffffff8139 58fb>] ? i915_gem_ throttle_ ioctl+0x3b/ 0x90
[<ffffffff8164 25fa>] mutex_lock_ nested+ 0x1ea/0x4c0
[<ffffffff8139 58fb>] ? i915_gem_ throttle_ ioctl+0x3b/ 0x90
[<ffffffff814f 27f5>] ? sock_aio_ write+0x125/ 0x140
[<ffffffff8139 58fb>] ? i915_gem_ throttle_ ioctl+0x3b/ 0x90
[<ffffffff8139 58fb>] i915_gem_ throttle_ ioctl+0x3b/ 0x90
[<ffffffff8137 734a>] drm_ioctl+ 0x33a/0x4c0
[<ffffffff812d 3d9c>] ? debug_object_ deactivate+ 0x5c/0x110
[<ffffffff812d 333c>] ? do_raw_ spin_unlock+ 0x6c/0xc0
[<ffffffff8108 280d>] ? trace_hardirqs_ off+0xd/ 0x10
[<ffffffff8164 4d03>] ? _raw_spin_ unlock_ irqrestore+ 0x53/0xa0
[<ffffffff812d 3deb>] ? debug_object_ deactivate+ 0xab/0x110
[<ffffffff8107 2ffc>] ? lock_hrtimer_ base+0x2c/ 0x60
[<ffffffff8112 eff8>] vfs_ioctl+0x38/0xd0
[<ffffffff8112 f1ca>] do_vfs_ ioctl+0x8a/ 0x5b0
[<ffffffff8105 8dbc>] ? do_setitimer+ 0x1cc/0x1f0
[<ffffffff810e 8d72>] ? might_fault+ 0x72/0xd0
[<ffffffff8112 f73a>] sys_ioctl+0x4a/0x80
[<ffffffff812d 3d9c>] ? debug_object_ deactivate+ 0x5c/0x110
[<ffffffff8100 3182>] system_ call_fastpath+ 0x16/0x1b