[linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch

[Andrew Morton]

Lee Revell <rlrevell at joe-job.com> wrote:
>
> Jul 13 04:27:50 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D0p
>  Jul 13 04:27:50 mindpipe kernel:  [__crc_totalram_pages+1387264/5353478] snd_pcm_period_elapsed+0x2ca/0x410 [snd_pcm]
>  Jul 13 04:27:50 mindpipe kernel:  [group_send_sig_info+101/144] group_send_sig_info+0x65/0x90
>  Jul 13 04:27:50 mindpipe kernel:  [__crc_totalram_pages+1455070/5353478] snd_emu10k1_interrupt+0x3c8/0x480 [snd_emu10k1]
>  Jul 13 04:27:50 mindpipe kernel:  [handle_IRQ_event+49/96] handle_IRQ_event+0x31/0x60
>  Jul 13 04:27:50 mindpipe kernel:  [do_IRQ+155/352] do_IRQ+0x9b/0x160
>  Jul 13 04:27:50 mindpipe kernel:  [common_interrupt+24/32] common_interrupt+0x18/0x20
>  Jul 13 04:27:50 mindpipe kernel:  [_mmx_memcpy+141/384] _mmx_memcpy+0x8d/0x180
>  Jul 13 04:27:50 mindpipe kernel:  [scrup+242/320] scrup+0xf2/0x140
>  Jul 13 04:27:50 mindpipe kernel:  [lf+96/112] lf+0x60/0x70
>  Jul 13 04:27:50 mindpipe kernel:  [do_con_trol+2907/3360] do_con_trol+0xb5b/0xd20
>  Jul 13 04:27:50 mindpipe kernel:  [do_con_write+1128/1888] do_con_write+0x468/0x760
>  Jul 13 04:27:50 mindpipe kernel:  [con_put_char+51/64] con_put_char+0x33/0x40

framebuffer scrolling inside lock_kernel().  Tricky.  Suggest you use X or
vgacon.  You can try removing the lock_kernel() calls from do_tty_write(),
but make sure you're wearing ear protection.