LOR with sound

Hi all,

I've gotten following LoR with sounde code, using kernel from Feb 15th
with patch from Mathew Kanner:
     http://docs.freebsd.org/cgi/mid.cgi?20031215185606.GA63202

> lock order reversal
>  1st 0xc31ca140 pcm0:play:0 (pcm play channel) _at_ dev/sound/pcm/channel.c:1069
>  2nd 0xc31b6ec0 pcm0:record:0 (pcm record channel) _at_ dev/sound/pcm/channel.c:1350
> Stack backtrace:
> backtrace(0,ffffffff,c0761120,c0761148,c07303fc) at backtrace+0x12
> witness_checkorder(c31b6ec0,9,c06cfeaf,546) at witness_checkorder+0x593
> _mtx_lock_flags(c31b6ec0,0,c06cfea6,546,d29f2a70) at _mtx_lock_flags+0x67
> chn_lock(c32add80,c,c407b000,c405b000,102) at chn_lock+0x1a
> sndbuf_remalloc(c31bab00,200,100,c32add80,100) at sndbuf_remalloc+0x8c
> chn_setblocksize(c32add80,200,0,20000,c31cf718) at chn_setblocksize+0x306
> chn_tryspeed(c32add80,1f40) at chn_tryspeed+0x149
> chn_tryformat(c32add80,10,10,d29f2c60,d29f2c60) at chn_tryformat+0xaf
> chn_setformat(c32add80,10,0,c1616a00,c32add80) at chn_setformat+0x15
> dsp_ioctl(c075a6a0,c0045005,d29f2c60,3,c3733540) at dsp_ioctl+0x9f2
> spec_ioctl(d29f2b88,d29f2c34,c0583df7,d29f2b88,c074fc40) at spec_ioctl+0x12d
> spec_vnoperate(d29f2b88) at spec_vnoperate+0x13
> vn_ioctl(c3778f24,c0045005,d29f2c60,c371f180,c3733540) at vn_ioctl+0x17f
> ioctl(c3733540,d29f2d14,3,5,296) at ioctl+0x37c
> syscall(c068002f,2f,2f,0,0) at syscall+0x217
> Xint0x80_syscall() at Xint0x80_syscall+0x1d
> --- syscall (54), eip = 0x284e7b1b, esp = 0xbfbf5dfc, ebp = 0xbfbf5e18 ---


Also, I'm getting following warning with sound related code path.

> malloc() of "4096" with the following non-sleepable locks held:
> exclusive sleep mutex pcm0:play:0 (pcm play channel) r = 0 (0xc31ca140) locked _at_ dev/sound/pcm/channel.c:1069
> malloc() of "4096" with the following non-sleepable locks held:
> exclusive sleep mutex pcm0 (sound cdev) r = 0 (0xc31ca2c0) locked _at_ dev/sound/pcm/dsp.c:213
> malloc() of "4096" with the following non-sleepable locks held:
> exclusive sleep mutex pcm0:record:0 (pcm record channel) r = 0 (0xc31b6ec0) locked _at_ dev/sound/pcm/dsp.c:479

FYI, I use following sound card build into my note book.

pcm0: <Yamaha DS-1E (YMF744)> port 0xfcac-0xfcaf,0xfc00-0xfc3f mem 0xfecf0000-0xfecf7fff irq 9 at device 9.0 on pci0
pcm0: <Asahi Kasei AK4543 AC97 Codec>


Thanks,
 Haro
=------------------------------------------------------------------------------
           _ _    Munehiro (haro) Matsuda
 -|- /_\  |_|_|   Internet Solution Dept., Kubota Graphics Technologies Inc.
 /|\ |_|  |_|_|   2-8-8 Shinjuku Shinjuku-ku Tokyo 160-0022, Japan
                  Tel: +81-3-3225-0767  Fax: +81-3-3225-0740
                  Email: haro_at_kgt.co.jp