linux-kernel - Re: sound skipping regression introduced in 2.6.30-rc8

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Date:	Thu, 11 Jun 2009 15:32:33 +0200
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	tiwai@...e.de, linux-kernel@...r.kernel.org
Subject: Re: sound skipping regression introduced in 2.6.30-rc8

On Thursday 11 June 2009 14:02:20 David Miller wrote:
> From: Takashi Iwai <tiwai@...e.de>
> Date: Wed, 10 Jun 2009 21:37:14 +0200
> 
> > Also, it'd be helpful if you can check whether the problem exists in
> > the current sound git tree (for-linus branch), too.
> >   git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6.git for-linus
> 
> Same behavior as 2.6.30, but debugging messages are formatted differently
> :-)
> 
> [ 1109.062182] PCM: Lost interrupts? (stream=0, delta=16384, intr_ptr=73728)
> [ 1125.126123] PCM: Lost interrupts? (stream=0, delta=16384, intr_ptr=861184)
> [ 1131.398094] PCM: Lost interrupts? (stream=0, delta=16384, intr_ptr=1178624)
> [ 1135.579406] PCM: Lost interrupts? (stream=0, delta=16384, intr_ptr=1395712)
> [ 1145.115367] PCM: Lost interrupts? (stream=0, delta=16384, intr_ptr=1869824)
> [ 1152.688670] PCM: Lost interrupts? (stream=0, delta=16384, intr_ptr=2249728)

[ Just another data point. ]

I'm experiencing similar problem with the sound in recent -next kernels.

Though the only debug data that I'm getting with xrun_debug == 1 is:

XRUN: pcmC0D0p:0
XRUN: pcmC0D0p:0
XRUN: pcmC0D0p:0
XRUN: pcmC0D0p:0
XRUN: pcmC0D0p:0

with xrun_debug == 3:

XRUN: pcmC0D0p:0
Pid: 4718, comm: audacious Not tainted 2.6.30-next-20090611-07944-gc1b019d-dirty #21
Call Trace:
 [<e1074684>] xrun+0x8b/0x92 [snd_pcm]
 [<e10746fd>] snd_pcm_update_hw_ptr_post+0x72/0xa9 [snd_pcm]
 [<e1074c2d>] snd_pcm_update_hw_ptr+0x18f/0x19b [snd_pcm]
 [<e1071b9e>] snd_pcm_common_ioctl1+0xa56/0x14e4 [snd_pcm]
 [<c0141628>] ? getnstimeofday+0x52/0xda
 [<c016ce03>] ? might_fault+0x4b/0x88
 [<c016ce03>] ? might_fault+0x4b/0x88
 [<c016ce03>] ? might_fault+0x4b/0x88
 [<c018ecd3>] ? core_sys_select+0x27e/0x2c9
 [<e1072d51>] snd_pcm_playback_ioctl1+0x37a/0x3d2 [snd_pcm]
 [<e1072e17>] snd_pcm_kernel_ioctl+0x38/0x5d [snd_pcm]
 [<e1297443>] snd_pcm_oss_ioctl+0x7b1/0xc08 [snd_pcm_oss]
 [<c016ce03>] ? might_fault+0x4b/0x88
 [<e1296c92>] ? snd_pcm_oss_ioctl+0x0/0xc08 [snd_pcm_oss]
 [<c018cfab>] vfs_ioctl+0x22/0x69
 [<c018d475>] do_vfs_ioctl+0x483/0x4bd
 [<c01833c3>] ? fget_light+0x43/0xe1
 [<c0183437>] ? fget_light+0xb7/0xe1
 [<c018d4db>] sys_ioctl+0x2c/0x45
 [<c0102988>] sysenter_do_call+0x12/0x36
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