From: Lee Revell <rlrevell@joe-job.com>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel <alsa-devel@lists.sourceforge.net>
Subject: Re: Oops in snd_emu10k1_efx_playback_prepare
Date: Fri, 18 Mar 2005 22:30:50 -0500 [thread overview]
Message-ID: <1111203050.12740.7.camel@mindpipe> (raw)
In-Reply-To: <s5hll8uup1p.wl@alsa2.suse.de>
On Fri, 2005-03-11 at 17:26 +0100, Takashi Iwai wrote:
> At Thu, 10 Mar 2005 16:35:45 -0500,
> Lee Revell wrote:
> >
> > On Wed, 2005-03-09 at 18:21 +0100, Takashi Iwai wrote:
> > > At Wed, 09 Mar 2005 11:54:30 +0100,
> > > I wrote:
> > > >
> > > > At Wed, 09 Mar 2005 10:57:54 +0100,
> > > > I wrote:
> > > > >
> > > > > At Wed, 09 Mar 2005 00:56:19 -0500,
> > > > > Lee Revell wrote:
> > > > > >
> > > > > > I got an Oops again that seems to be caused by something in mu
> > > > > > multichannel patch. But, I don't really know what to make of it.
> > > > > >
> > > > > > ksymoops seems broken for 2.6 kernels, but it was able to disassemble
> > > > > > the offending code.
> > > > > >
> > > > > > Any ideas?
> > > > >
> > > > > In snd_emu10k1_pcm_channel_alloc(), epcm->voices[2..NUM_EFX_PLAYBACK]
> > > > > are not freed correctly. Possibly did this hit?
> > > >
> > > > Or maybe I misread the code. Need more coffee now... :)
> > > >
> > > > Anyway, snd_emu10k1_pcm_channel_alloc() should return immediately at
> > > > the second or later call when all voices have been already allocated.
> > >
> > > The quick fix patch is below.
> > > But I'm not sure whether this is really related with the given bug.
> > >
> >
> > Thanks, I'll try this. Unfortunately the bug is very hard to hit (I
> > have only triggered it twice) and I have no idea how to reproduce it.
> > It's somwhow associated with restarting JACK.
>
> I'll apply this fix to CVS anyway.
> Please report if you hit the bug again.
>
>
I hit it again. It's slightly different this time.
The problem triggered when I stopped JACK then restarted with a smaller
period size.
Lee
Unable to handle kernel paging request at virtual address 936e4158
c01d3d63
*pde = 00000000
Oops: 0000 [#1]
CPU: 0
EIP: 0060:[<c01d3d63>] Not tainted VLI
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00210012 (2.6.12-rc1)
eax: 00000008 ebx: 936e4170 ecx: 00000002 edx: d0b9fe3c
esi: 936e4158 edi: d0b9fe3c ebp: d0b9fe0c esp: d0b9fdf8
ds: 007b es: 007b ss: 0068
Stack: 00200046 def60000 0779dfff 03020100 00000001 d0b9fe50 e08e2178 d0b9fe3c
936e4158 00000008 00000000 00200216 00000001 00000000 de61e000 00000005
00000000 00000002 00000005 00001780 00001780 0000000f d0b9fe88 e08e2597
Call Trace:
[<c01031cf>] show_stack+0x7f/0xa0
[<c010336a>] show_registers+0x15a/0x1c0
[<c0103560>] die+0xf0/0x190
[<c010e34b>] do_page_fault+0x31b/0x670
[<c0102e23>] error_code+0x2b/0x30
[<e08e2178>] snd_emu10k1_pcm_init_voice+0x5c8/0x610 [snd_emu10k1]
[<e08e2597>] snd_emu10k1_efx_playback_prepare+0xd7/0xf0 [snd_emu10k1]
[<e08987f5>] snd_pcm_do_prepare+0x15/0x40 [snd_pcm]
[<e0897eb4>] snd_pcm_action_single+0x34/0x70 [snd_pcm]
[<e08980f3>] snd_pcm_action_nonatomic+0x73/0x80 [snd_pcm]
[<e0898871>] snd_pcm_prepare+0x21/0x30 [snd_pcm]
[<e089af67>] snd_pcm_playback_ioctl1+0x47/0x2d0 [snd_pcm]
[<e089be97>] snd_pcm_playback_ioctl_old+0x27/0x40 [snd_pcm]
[<c01631a3>] do_ioctl+0x63/0x90
[<c0163362>] vfs_ioctl+0x62/0x1c0
[<c0163521>] sys_ioctl+0x61/0x80
[<c0102c75>] syscall_call+0x7/0xb
Code: 90 90 90 90 90 90 90 90 55 89 e5 83 ec 14 8b 45 10 89 75 f8 89 7d fc 8b 55 08 8b 75 0c 3d ff 01 00 00 77 24 89 c1 89 d7 c1 e9 02 <f3> a5 a8 02 74 02 66 a5 a8 01 74 01 a4 89 d0 8b 75 f8 8b 7d fc
>>EIP; c01d3d63 No symbols available <=====
Trace; c01031cf No symbols available
Trace; c010336a No symbols available
Trace; c0103560 No symbols available
Trace; c010e34b No symbols available
Trace; c0102e23 No symbols available
Trace; e08e2178 No symbols available
Trace; e08e2597 No symbols available
Trace; e08987f5 No symbols available
Trace; e0897eb4 No symbols available
Trace; e08980f3 No symbols available
Trace; e0898871 No symbols available
Trace; e089af67 No symbols available
Trace; e089be97 No symbols available
Trace; c01631a3 No symbols available
Trace; c0163362 No symbols available
Trace; c0163521 No symbols available
Trace; c0102c75 No symbols available
This architecture has variable length instructions, decoding before eip
is unreliable, take these instructions with a pinch of salt.
Code; c01d3d38 No symbols available
00000000 <_EIP>:
Code; c01d3d38 No symbols available
0: 90 nop
Code; c01d3d39 No symbols available
1: 90 nop
Code; c01d3d3a No symbols available
2: 90 nop
Code; c01d3d3b No symbols available
3: 90 nop
Code; c01d3d3c No symbols available
4: 90 nop
Code; c01d3d3d No symbols available
5: 90 nop
Code; c01d3d3e No symbols available
6: 90 nop
Code; c01d3d3f No symbols available
7: 90 nop
Code; c01d3d40 No symbols available
8: 55 push %ebp
Code; c01d3d41 No symbols available
9: 89 e5 mov %esp,%ebp
Code; c01d3d43 No symbols available
b: 83 ec 14 sub $0x14,%esp
Code; c01d3d46 No symbols available
e: 8b 45 10 mov 0x10(%ebp),%eax
Code; c01d3d49 No symbols available
11: 89 75 f8 mov %esi,0xfffffff8(%ebp)
Code; c01d3d4c No symbols available
14: 89 7d fc mov %edi,0xfffffffc(%ebp)
Code; c01d3d4f No symbols available
17: 8b 55 08 mov 0x8(%ebp),%edx
Code; c01d3d52 No symbols available
1a: 8b 75 0c mov 0xc(%ebp),%esi
Code; c01d3d55 No symbols available
1d: 3d ff 01 00 00 cmp $0x1ff,%eax
Code; c01d3d5a No symbols available
22: 77 24 ja 48 <_EIP+0x48>
Code; c01d3d5c No symbols available
24: 89 c1 mov %eax,%ecx
Code; c01d3d5e No symbols available
26: 89 d7 mov %edx,%edi
Code; c01d3d60 No symbols available
28: c1 e9 02 shr $0x2,%ecx
This decode from eip onwards should be reliable
Code; c01d3d63 No symbols available
00000000 <_EIP>:
Code; c01d3d63 No symbols available <=====
0: f3 a5 repz movsl %ds:(%esi),%es:(%edi) <=====
Code; c01d3d65 No symbols available
2: a8 02 test $0x2,%al
Code; c01d3d67 No symbols available
4: 74 02 je 8 <_EIP+0x8>
Code; c01d3d69 No symbols available
6: 66 a5 movsw %ds:(%esi),%es:(%edi)
Code; c01d3d6b No symbols available
8: a8 01 test $0x1,%al
Code; c01d3d6d No symbols available
a: 74 01 je d <_EIP+0xd>
Code; c01d3d6f No symbols available
c: a4 movsb %ds:(%esi),%es:(%edi)
Code; c01d3d70 No symbols available
d: 89 d0 mov %edx,%eax
Code; c01d3d72 No symbols available
f: 8b 75 f8 mov 0xfffffff8(%ebp),%esi
Code; c01d3d75 No symbols available
12: 8b 7d fc mov 0xfffffffc(%ebp),%edi
2 warnings and 2 errors issued. Results may not be reliable.
-------------------------------------------------------
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next prev parent reply other threads:[~2005-03-19 3:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-09 5:56 Oops in snd_emu10k1_efx_playback_prepare Lee Revell
2005-03-09 9:57 ` Takashi Iwai
2005-03-09 10:54 ` Takashi Iwai
2005-03-09 17:21 ` Takashi Iwai
2005-03-10 21:35 ` Lee Revell
2005-03-11 16:26 ` Takashi Iwai
2005-03-19 3:30 ` Lee Revell [this message]
2005-03-19 3:37 ` Lee Revell
2005-03-23 11:35 ` Takashi Iwai
2005-03-23 20:41 ` Lee Revell
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