ubuntu-x-swat team mailing list archive

[Dagfinn Ilmari Mannsåker <ilmari@xxxxxxxxxx>]

It just occurred gain, this time with a different backtrace:

[ 4350.545525] INFO: task i915:308 blocked for more than 120 seconds.
[ 4350.545529] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 4350.545533] i915          D 00000000ffffffff     0   308      2 0x00000000
[ 4350.545539]  ffff88022e105d40 0000000000000046 0000000000015bc0 0000000000015bc0
[ 4350.545545]  ffff88022f595f80 ffff88022e105fd8 0000000000015bc0 ffff88022f595bc0
[ 4350.545550]  0000000000015bc0 ffff88022e105fd8 0000000000015bc0 ffff88022f595f80
[ 4350.545555] Call Trace:
[ 4350.545568]  [<ffffffff8153f897>] __mutex_lock_slowpath+0xe7/0x170
[ 4350.545576]  [<ffffffff81058620>] ? finish_task_switch+0x50/0xe0
[ 4350.545580]  [<ffffffff8153f78b>] mutex_lock+0x2b/0x50
[ 4350.545617]  [<ffffffffa00c337d>] i915_gem_retire_work_handler+0x3d/0xa0 [i915]
[ 4350.545635]  [<ffffffffa00c3340>] ? i915_gem_retire_work_handler+0x0/0xa0 [i915]
[ 4350.545643]  [<ffffffff81080777>] run_workqueue+0xc7/0x1a0
[ 4350.545647]  [<ffffffff810808f3>] worker_thread+0xa3/0x110
[ 4350.545653]  [<ffffffff81085320>] ? autoremove_wake_function+0x0/0x40
[ 4350.545657]  [<ffffffff81080850>] ? worker_thread+0x0/0x110
[ 4350.545661]  [<ffffffff81084fa6>] kthread+0x96/0xa0
[ 4350.545667]  [<ffffffff810141ea>] child_rip+0xa/0x20
[ 4350.545671]  [<ffffffff81084f10>] ? kthread+0x0/0xa0
[ 4350.545674]  [<ffffffff810141e0>] ? child_rip+0x0/0x20
[ 4350.545694] INFO: task Xorg:1316 blocked for more than 120 seconds.
[ 4350.545696] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 4350.545699] Xorg          D 0000000000000000     0  1316   1235 0x00400004
[ 4350.545703]  ffff88020c4a7cb8 0000000000000086 0000000000015bc0 0000000000015bc0
[ 4350.545708]  ffff88020c411ab0 ffff88020c4a7fd8 0000000000015bc0 ffff88020c4116f0
[ 4350.545713]  0000000000015bc0 ffff88020c4a7fd8 0000000000015bc0 ffff88020c411ab0
[ 4350.545717] Call Trace:
[ 4350.545722]  [<ffffffff8153f897>] __mutex_lock_slowpath+0xe7/0x170
[ 4350.545726]  [<ffffffff8153f78b>] mutex_lock+0x2b/0x50
[ 4350.545742]  [<ffffffffa00c2e36>] i915_gem_busy_ioctl+0x46/0xd0 [i915]
[ 4350.545757]  [<ffffffffa002de2a>] drm_ioctl+0x27a/0x480 [drm]
[ 4350.545771]  [<ffffffffa00c2df0>] ? i915_gem_busy_ioctl+0x0/0xd0 [i915]
[ 4350.545776]  [<ffffffff81088432>] ? enqueue_hrtimer+0x82/0xd0
[ 4350.545782]  [<ffffffff810893b9>] ? __hrtimer_start_range_ns+0x189/0x400
[ 4350.545788]  [<ffffffff81152a92>] vfs_ioctl+0x22/0xa0
[ 4350.545793]  [<ffffffff81152d41>] do_vfs_ioctl+0x81/0x380
[ 4350.545797]  [<ffffffff811530c1>] sys_ioctl+0x81/0xa0
[ 4350.545802]  [<ffffffff810131b2>] system_call_fastpath+0x16/0x1b

Full dmesg attached.

** Attachment added: "dmesg"
   http://launchpadlibrarian.net/45481306/dmesg

-- 
[arrandale] deadlock in i915_gem_madvise_ioctl
https://bugs.launchpad.net/bugs/568138
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