From mboxrd@z Thu Jan  1 00:00:00 1970
From: Markus Trippelsdorf <markus@trippelsdorf.de>
Subject: Re: ALSA hang on 4.13.0-rc7
Date: Wed, 30 Aug 2017 13:33:40 +0200
Message-ID: <20170830113340.GA284@x4>
References: <20170830100334.GA281@x4>
 <s5hval55mg5.wl-tiwai@suse.de>
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To: Takashi Iwai <tiwai@suse.de>
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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.

-- 
Markus