Date: Sat, 18 Oct 2008 10:44:46 +0200 From: Stefan Ehmann <shoesoft@gmx.net> To: freebsd-multimedia@freebsd.org Subject: _mtx_lock_sleep: recursed on non-recursive mutex pcm0 (envy24) Message-ID: <200810181044.47598.shoesoft@gmx.net>
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Hello, I think this problem occurs in some cases if multiple playback channels are active at the same time. Note that I don't use vchans but the playback channels provided by envy24. $ uname -a FreeBSD taxman.pepperland 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #64: Fri Oct 17 11:04:45 CEST 2008 stefan@taxman.pepperland:/usr/obj/usr/src/sys/TAXMAN i386 Here's the backtrace: Unread portion of the kernel message buffer: panic: _mtx_lock_sleep: recursed on non-recursive mutex pcm0 @ /usr/src/sys/modules/sound/driver/envy24/../../../../dev/sound/pci/envy24.c:2044 ... #0 doadump () at pcpu.h:196 in pcpu.h (kgdb) bt #0 doadump () at pcpu.h:196 #1 0xc045acf9 in db_fncall (dummy1=1, dummy2=0, dummy3=-1064525632, dummy4=0xe475aa28 "\200¨3Ä") at /usr/src/sys/ddb/db_command.c:516 #2 0xc045b27c in db_command (last_cmdp=0xc0844ad4, cmd_table=0x0, dopager=1) at /usr/src/sys/ddb/db_command.c:413 #3 0xc045b38a in db_command_loop () at /usr/src/sys/ddb/db_command.c:466 #4 0xc045cb7d in db_trap (type=3, code=0) at /usr/src/sys/ddb/db_main.c:228 #5 0xc05865f6 in kdb_trap (type=3, code=0, tf=0xe475abd0) at /usr/src/sys/kern/subr_kdb.c:524 #6 0xc079572f in trap (frame=0xe475abd0) at /usr/src/sys/i386/i386/trap.c:688 #7 0xc077b9db in calltrap () at /usr/src/sys/i386/i386/exception.s:159 #8 0xc058677a in kdb_enter_why (why=0xc07d2a12 "panic", msg=0xc07d2a12 "panic") at cpufunc.h:60 #9 0xc055b7e6 in panic (fmt=0xc07d1776 "_mtx_lock_sleep: recursed on non- recursive mutex %s @ %s:%d\n") at /usr/src/sys/kern/kern_shutdown.c:557 #10 0xc054ec7a in _mtx_lock_sleep (m=0xc442ecc0, tid=3292586544, opts=0, file=0xc09a4d64 "/usr/src/sys/modules/sound/driver/envy24/../../../../dev/sound/pci/envy24.c", line=2044) at /usr/src/sys/kern/kern_mutex.c:314 #11 0xc054eecf in _mtx_lock_flags (m=0xc442ecc0, opts=0, file=0xc09a4d64 "/usr/src/sys/modules/sound/driver/envy24/../../../../dev/sound/pci/envy24.c", line=2044) at /usr/src/sys/kern/kern_mutex.c:186 #12 0xc09a3140 in envy24_intr (p=0xc4442800) at /usr/src/sys/modules/sound/driver/envy24/../../../../dev/sound/pci/envy24.c:2044 #13 0xc053c775 in ithread_loop (arg=0xc44445e0) at /usr/src/sys/kern/kern_intr.c:1088 #14 0xc0539b08 in fork_exit (callout=0xc053c5b0 <ithread_loop>, arg=0xc44445e0, frame=0xe475ad38) at /usr/src/sys/kern/kern_fork.c:804 #15 0xc077ba50 in fork_trampoline () at /usr/src/sys/i386/i386/exception.s:264help
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