Date: Mon, 28 Apr 2003 06:49:38 +0200 From: Thierry Herbelot <thierry@herbelot.com> To: freebsd-current@freebsd.org Subject: Re: LOR in pcm Message-ID: <200304280649.38633.thierry@herbelot.com> In-Reply-To: <3EAC6AA9.6070404@kasimir.com> References: <3EAC6AA9.6070404@kasimir.com>
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<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) @ /files3/src/sys/dev/sound/isa/mss.c:179
2nd 0xc40bc600 pcm0:play:0 (pcm channel) @
/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@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#
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