[alsa-devel] ALSA hang on 4.13.0-rc7

[Markus Trippelsdorf]

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?
> > 
> > Yes. 4.11 is fine.
> 
> And 4.12?

Just build it and yes 4.12 is fine, too.

(Before you ask, I have intention to bisect the issue.
It would be too annoying with the all the required reboots.

But if you want I can run scripts/faddr2line on the backtraces.)

-- 
Markus