On 2017.08.30 at 13:46 +0200, Takashi Iwai wrote:
> On Wed, 30 Aug 2017 13:42:41 +0200,
> Markus Trippelsdorf wrote:
> >
> > On 2017.08.30 at 13:34 +0200, Takashi Iwai wrote:
> > > On Wed, 30 Aug 2017 13:33:40 +0200,
> > > Markus Trippelsdorf wrote:
> > > >
> > > > On 2017.08.30 at 13:23 +0200, Takashi Iwai wrote:
> > > > > On Wed, 30 Aug 2017 12:03:34 +0200,
> > > > > Markus Trippelsdorf wrote:
> > > > > >
> > > > > > On my system ALSA sometimes hangs:
> > > > > >
> > > > > > sysrq: SysRq : Show Blocked State
> > > > > > task PC stack pid father
> > > > > > output:ALSA def D 0 171 1 0x00000000
> > > > > > Call Trace:
> > > > > > ? __schedule+0x17c/0x720
> > > > > > ? schedule_preempt_disabled+0x2d/0x80
> > > > > > ? __mutex_lock_slowpath+0x141/0x420
> > > > > > ? snd_pcm_common_ioctl1+0x2f/0x1400
> > > > > > ? snd_pcm_common_ioctl1+0x2f/0x1400
> > > > > > ? snd_card_file_remove+0x76/0x120
> > > > > > ? snd_pcm_playback_ioctl+0x1c7/0x560
> > > > > > ? dput+0xb6/0x1e0
> > > > > > ? SyS_ioctl+0xa7/0x860
> > > > > > ? task_work_run+0x70/0xa0
> > > > > > ? entry_SYSCALL_64_fastpath+0x13/0x94
> > > > > >
> > > > > > Only a reboot will fix the issue.
> > > > >
> > > > > Is this a regression?
The issue started with:
commit 68b4acd322494444803a3f49884ae889c8ec6689 (HEAD, refs/bisect/bad)
Author: Takashi Iwai <tiwai@xxxxxxx>
Date: Tue May 24 15:07:39 2016 +0200
ALSA: pcm: Apply power lock globally to common ioctls
--
Markus
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