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SubjectRe: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch
Lee Revell <rlrevell@joe-job.com> wrote:
>
> Here are a few more:
>
> Jul 12 22:20:41 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D0p
> Jul 12 22:20:41 mindpipe kernel: [__crc_totalram_pages+1387264/5353478] snd_pcm_period_elapsed+0x2ca/0x410 [snd_pcm]
> Jul 12 22:20:41 mindpipe kernel: [__crc_totalram_pages+1455070/5353478] snd_emu10k1_interrupt+0x3c8/0x480 [snd_emu10k1]
> Jul 12 22:20:41 mindpipe kernel: [handle_IRQ_event+49/96] handle_IRQ_event+0x31/0x60
> Jul 12 22:20:41 mindpipe kernel: [do_IRQ+155/352] do_IRQ+0x9b/0x160
> Jul 12 22:20:41 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20
> Jul 12 22:20:41 mindpipe kernel: [unix_stream_recvmsg+135/1088] unix_stream_recvmsg+0x87/0x440
> Jul 12 22:20:41 mindpipe kernel: [avc_has_perm+72/96] avc_has_perm+0x48/0x60
> Jul 12 22:20:41 mindpipe kernel: [sock_aio_read+155/176] sock_aio_read+0x9b/0xb0
> Jul 12 22:20:41 mindpipe kernel: [do_sync_read+125/192] do_sync_read+0x7d/0xc0
> Jul 12 22:20:41 mindpipe kernel: [do_select+435/752] do_select+0x1b3/0x2f0
> Jul 12 22:20:41 mindpipe kernel: [vfs_read+223/256] vfs_read+0xdf/0x100
> Jul 12 22:20:42 mindpipe kernel: [sys_read+45/80] sys_read+0x2d/0x50
> Jul 12 22:20:42 mindpipe kernel: [syscall_call+7/11] syscall_call+0x7/0xb
> Jul 12 22:20:42 mindpipe kernel:
> Jul 12 22:20:44 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D0p
> Jul 12 22:20:44 mindpipe kernel: [__crc_totalram_pages+1387264/5353478] snd_pcm_period_elapsed+0x2ca/0x410 [snd_pcm]
> Jul 12 22:20:44 mindpipe kernel: [__crc_totalram_pages+1455070/5353478] snd_emu10k1_interrupt+0x3c8/0x480 [snd_emu10k1]
> Jul 12 22:20:44 mindpipe kernel: [handle_IRQ_event+49/96] handle_IRQ_event+0x31/0x60
> Jul 12 22:20:44 mindpipe kernel: [do_IRQ+155/352] do_IRQ+0x9b/0x160
> Jul 12 22:20:44 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20

Oh dear, these don't make much sense.

You'll have the best chance of getting decent traces with
CONFIG_FRAME_POINTER=y and CONFIG_4KSTACKS=n, but I'm not sure that this
will help a lot. Are you sure that CONFIG_PREEMPT is enabled on that
kernel?

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