Re: LOR in pcm

<AOL>
me too, but another place
</AOL>

on a recently recompiled straight-SMP oldish BP6 :

multi-cur# lock order reversal
 1st 0xc40bca80 pcm0 (sound softc) _at_ /files3/src/sys/dev/sound/isa/mss.c:179
 2nd 0xc40bc600 pcm0:play:0 (pcm channel) _at_ 
/files3/src/sys/dev/sound/pcm/channel.c:440
Stack backtrace:
backtrace(c050e34e,c40bc600,c4089bd4,c06e05b0,c06e062e) at backtrace+0x17
witness_lock(c40bc600,8,c06e062e,1b8,a) at witness_lock+0x697
_mtx_lock_flags(c40bc600,0,c06e062e,1b8,c4082700) at _mtx_lock_flags+0xb2
chn_intr(c4089b80,18,0,1010c880,c40bc880) at chn_intr+0x2f
mss_intr(c4082700,0,c05093e1,218,c3f485a0) at mss_intr+0x8b
ithread_loop(c4089d00,d67ffd48,c050926d,313,0) at ithread_loop+0x182
fork_exit(c0305cd0,c4089d00,d67ffd48) at fork_exit+0xc0
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xd67ffd7c, ebp = 0 ---

multi-cur#



multi-cur# uname -a
FreeBSD multi-cur.herbelot.nom 5.0-CURRENT FreeBSD 5.0-CURRENT #12: Sat Apr 26 
23:24:46 CEST 2003     
thierry.herbelot_at_multi-cur.herbelot.nom:/files3/obj/files3/src/sys/SMP  i386
multi-cur#
multi-cur#

multi-cur# ident /files3/src/sys/dev/sound/isa/mss.c
/files3/src/sys/dev/sound/isa/mss.c:
     $FreeBSD: src/sys/dev/sound/isa/mss.c,v 1.84 2003/02/07 14:05:33 nyan Exp 
$
multi-cur# ident /files3/src/sys/dev/sound/pcm/channel.c
/files3/src/sys/dev/sound/pcm/channel.c:
     $FreeBSD: src/sys/dev/sound/pcm/channel.c,v 1.88 2003/02/26 14:38:19 
orion Exp $
multi-cur#