Date: Tue, 21 May 2002 08:05:24 -0700 (PDT) From: David Wolfskill <david@catwhisker.org> To: current@FreeBSD.ORG, david@catwhisker.org Subject: Re: panic "mutex sockbuf rcv not owned at /usr/src/sys/fs/fifofs/fifo_vnops.c:229" Message-ID: <200205211505.g4LF5O7b019311@bunrab.catwhisker.org> In-Reply-To: <200205211428.g4LEStrB019131@bunrab.catwhisker.org>
next in thread | previous in thread | raw e-mail | index | archive | help
OK; after restart, I got a slightly different panic. The laptop is still
cranking along, and has nearly finished the "make -j4 buildworld" without
incident (so far), but the build machine (which is SMP -- 2x866 PIII) has
died again during the ">>> stage 4: building libraries" step:
lock order reversal
1st 0xc032e820 sched lock (sched lock) @ /usr/src/sys/kern/kern_synch.c:839
2nd 0xc039db60 sio (sio) @ /usr/src/sys/dev/sio/sio.c:3186
Fatal trap 12: page fault while in kernel mode
cpuid = 1; lapic.id = 01000000
fault virtual address = 0x79
fault code = supervisor read, page not present
instruction pointer = 0x8:0xc01af409
stack pointer = 0x10:0xd7b71cc0
frame pointer = 0x10:0xd7b71cdc
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 13 (swi6: tty:sio clock)
kernel: type 12 trap, code=0
Stopped at schedcpu+0x12b: cmpb $0x9f,0x79(%ebx)
db> show pcpu 0
cpuid = 0
curthread = 0xdb30e100: pid 40054 "sh"
curpcb = 0xdb1bada0
fpcurthread = none
idlethread = 0xd6960a3c: pid 11 "idle: cpu0"
currentldt = 0x28
spin locks held:
db> show pcpu 1
cpuid = 1
curthread = 0xd6960414: pid 13 "swi6: tty:sio clock"
curpcb = 0xd7b71da0
fpcurthread = none
idlethread = 0xd6960d50: pid 10 "idle: cpu1"
currentldt = 0x28
spin locks held:
exclusive spin mutex sched lock r = 0 (0xc032e820) locked @ /usr/src/sys/kern/kern_synch.c:839
db> tr
schedcpu(0) at schedcpu+0x12b
softclock(0) at softclock+0x14e
ithread_loop(ce513700,d7b71d48,d6960414,c019cfd0,0) at ithread_loop+0x11c
fork_exit(c019cfd0,ce513700,d7b71d48) at fork_exit+0x8a
fork_trampoline() at fork_trampoline+0x37
db> show locks
shared sx allproc r = 0 (0xc032ee00) locked @ /usr/src/sys/kern/kern_synch.c:267
exclusive spin mutex sched lock r = 0 (0xc032e820) locked @ /usr/src/sys/kern/kern_synch.c:839
db>
I'm not seeing an overwhelming degree of commonality between the two
panics so far....
Cheers,
david
--
David H. Wolfskill david@catwhisker.org
Trying to support or use Microsoft products makes about as much sense
as painting a house with watercolors.
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200205211505.g4LF5O7b019311>