[alsa-devel] [snd_via82xx] EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit

[rom1dep]

2009/7/24 Colin Guthrie <gmane at colin.guthr.ie>:
> 'Twas brillig, and rom1dep at 23/07/09 18:23 did gyre and gimble:
>> 2009/7/23 Takashi Iwai <tiwai at suse.de>:
>>> At Thu, 23 Jul 2009 17:21:44 +0200,
>>> rom1dep wrote:
>>>> Hello !
>>>> I am encountering some issues with pulseaudio : after some time and
>>>> for no evident reason PA stops routing the sound.
>>>> That's what I get with $pulseaudio -vvv :
>>>> http://pastebin.mandriva.com/13648 (got from a 2.6.29.6_mdv kernel)
>>>> running $pacmd list-sinks when stuck gives :
>>>> http://pastebin.mandriva.com/13649
>>>>
>>>> Our pulseaudio integrator Colin Guthrie concluded :
>>>> "OK, so what is happening is that some alsa level problem is occurring
>>>> (due to mmap). Pulse tries to recover from this but cannot. The alsa
>>>> sink (and the whole card) is subsequently unloaded due to this fatal
>>>> error."
>>>> And now.. a quick paste from irc :
>>>> "[00:44:20] <coling> Jul 22 14:04:29 <mezcalero>     coling: driver
>>>> issue i am pretty sure
>>>> [00:44:20] <coling> Jul 22 14:04:33 <mezcalero>     i saw that before once
>>>> [00:44:20] <coling> Jul 22 14:04:55 <mezcalero>     coling: i.e.
>>>> EAGAIN on snd_pcm_prepare after EPIPE on mmap_commit
>>> This is odd.  EAGAIN is returned only at open, read/write and drain
>>> ioctls.
>>>
>>> Could you track with strace?
>>>
>>>
>>> Takashi
>>>
>>
>> It wasn't easy : that big output made my config swap and finally
>> pulseaudio leave for "E: cpulimit.c: Received request to terminate due
>> to CPU overload."
>> but :
>> http://pastebin.mandriva.com/13665
>
> You probably want to repost using a different pastebin... our stupid one
> cuts the posts short at some pointlessly low value... I've asked about
> this to get it made bigger but I don't know who looks after it. I'd
> recommend pastebin.com.
>
> Col

Or not :) the total strace takes 43Mo, I kept a few before and a few
after pulseaudio's "oops"
If it's not enough I can paste more on another pastebin but that's a
terribly big output...

>
>
> --
>
> Colin Guthrie
> gmane(at)colin.guthr.ie
> http://colin.guthr.ie/
>
> Day Job:
>   Tribalogic Limited [http://www.tribalogic.net/]
> Open Source:
>   Mandriva Linux Contributor [http://www.mandriva.com/]
>   PulseAudio Hacker [http://www.pulseaudio.org/]
>   Trac Hacker [http://trac.edgewall.org/]
>
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