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

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Subject: Re: [linux-audio-dev] Re: [announce] [patch] Voluntary Kernel Preemption Patch
From: Lee Revell (rlrevell_AT_joe-job.com)
Date: Tue Jul 13 2004 - 23:37:57 EEST

On Tue, 2004-07-13 at 05:29, Andrew Morton wrote:
> Lee Revell <rlrevell_AT_joe-job.com> wrote:
> >
> > On Tue, 2004-07-13 at 05:00, Andrew Morton wrote:
> > > Lee Revell <rlrevell_AT_joe-job.com> wrote:
> > > >
> > > > > 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.
> > > > >
> > > >
> > > > OK, I figured this was not an easy one. I can just not do that.
> > >
> > > Why not? You can certainly try removing those [un]lock_kernel() calls.
> > >
> >
> > Maybe I missed something. What exactly do you mean by 'make sure you're
> > wearing ear protection'?
> >
>
> It might go boom. If it does screw up, it probably won't be very seriously
> bad - maybe some display glitches. Just an experiment.

Heh, I thought you literally meant it could destroy my speakers. I have
a pretty loud amp hooked up to this thing! I will try that.

Meanwhile, here are some more XRUS traces from the same test, run
overnight, without any significant network activity. I believe updatedb
may have caused these. I left out the reiserfs related ones because
that seems to be a known issue.

Jul 13 06:22:07 mindpipe kernel:
Jul 13 06:22:07 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D0p
Jul 13 06:22:07 mindpipe kernel: [__crc_totalram_pages+1387264/5353478] snd_pcm_period_elapsed+0x2ca/0x410 [snd_pcm]
Jul 13 06:22:07 mindpipe kernel: [do_pollfd+125/144] do_pollfd+0x7d/0x90
Jul 13 06:22:07 mindpipe kernel: [__crc_totalram_pages+1455070/5353478] snd_emu10k1_interrupt+0x3c8/0x480 [snd_emu10k1]
Jul 13 06:22:07 mindpipe kernel: [handle_IRQ_event+49/96] handle_IRQ_event+0x31/0x60
Jul 13 06:22:07 mindpipe kernel: [do_IRQ+155/352] do_IRQ+0x9b/0x160
Jul 13 06:22:07 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20
Jul 13 06:22:07 mindpipe kernel:
Jul 13 06:22:07 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D0p
Jul 13 06:22:07 mindpipe kernel: [__crc_totalram_pages+1387264/5353478] snd_pcm_period_elapsed+0x2ca/0x410 [snd_pcm]
Jul 13 06:22:07 mindpipe kernel: [__crc_totalram_pages+1455070/5353478] snd_emu10k1_interrupt+0x3c8/0x480 [snd_emu10k1]
Jul 13 06:22:07 mindpipe kernel: [handle_IRQ_event+49/96] handle_IRQ_event+0x31/0x60
Jul 13 06:22:07 mindpipe kernel: [do_IRQ+155/352] do_IRQ+0x9b/0x160
Jul 13 06:22:07 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20
Jul 13 06:22:07 mindpipe kernel: [__kmalloc+110/160] __kmalloc+0x6e/0xa0
Jul 13 06:22:07 mindpipe kernel: [sys_poll+209/560] sys_poll+0xd1/0x230
Jul 13 06:22:07 mindpipe kernel: [__pollwait+0/160] __pollwait+0x0/0xa0
Jul 13 06:22:07 mindpipe kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Jul 13 06:22:07 mindpipe kernel:
Jul 13 06:22:19 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D0p
Jul 13 06:22:19 mindpipe kernel: [__crc_totalram_pages+1387264/5353478] snd_pcm_period_elapsed+0x2ca/0x410 [snd_pcm]
Jul 13 06:22:19 mindpipe kernel: [__crc_totalram_pages+1455070/5353478] snd_emu10k1_interrupt+0x3c8/0x480 [snd_emu10k1]
Jul 13 06:22:19 mindpipe kernel: [handle_IRQ_event+49/96] handle_IRQ_event+0x31/0x60
Jul 13 06:22:19 mindpipe kernel: [do_IRQ+155/352] do_IRQ+0x9b/0x160
Jul 13 06:22:19 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20
Jul 13 06:22:19 mindpipe kernel:
Jul 13 06:26:13 mindpipe kernel: ALSA /usr/src/alsa-cvs-1.0.5/alsa-driver/alsa-kernel/core/pcm_lib.c:169: XRUN: pcmC0D0p
Jul 13 06:26:13 mindpipe kernel: [__crc_totalram_pages+1387264/5353478] snd_pcm_period_elapsed+0x2ca/0x410 [snd_pcm]
Jul 13 06:26:13 mindpipe kernel: [__crc_totalram_pages+2260290/5353478] find_attr+0xdc/0x250 [ntfs]
Jul 13 06:26:13 mindpipe kernel: [__crc_totalram_pages+1455070/5353478] snd_emu10k1_interrupt+0x3c8/0x480 [snd_emu10k1]
Jul 13 06:26:13 mindpipe kernel: [handle_IRQ_event+49/96] handle_IRQ_event+0x31/0x60
Jul 13 06:26:13 mindpipe kernel: [do_IRQ+155/352] do_IRQ+0x9b/0x160
Jul 13 06:26:13 mindpipe kernel: [common_interrupt+24/32] common_interrupt+0x18/0x20
Jul 13 06:26:13 mindpipe kernel: [__crc_totalram_pages+2275930/5353478] ntfs_readdir+0xd24/0xfe0 [ntfs]
Jul 13 06:26:13 mindpipe kernel: [filldir64+0/256] filldir64+0x0/0x100
Jul 13 06:26:13 mindpipe kernel: [vfs_readdir+133/160] vfs_readdir+0x85/0xa0
Jul 13 06:26:13 mindpipe kernel: [filldir64+0/256] filldir64+0x0/0x100
Jul 13 06:26:13 mindpipe kernel: [sys_getdents64+102/163] sys_getdents64+0x66/0xa3
Jul 13 06:26:13 mindpipe kernel: [filldir64+0/256] filldir64+0x0/0x100
Jul 13 06:26:13 mindpipe kernel: [syscall_call+7/11] syscall_call+0x7/0xb
Jul 13 06:26:13 mindpipe kernel:

Lee

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