Re: repeated panics in mutex_vector_enter (from unp_thread)

[Brian Buhrow <buhrow%nfbcal.org@localhost>]

	Hello.  If you've not made any changes to the hardware or software and
things were stable, but now they're not, have you tried looking at the
hardware logs kept by the IPMI BMC board?  It could be there is a hardware
problem that's triggering this problem, rather than a specific software
bug.  Bad memory?  Failing cache controller?

-Brian

On Aug 6,  2:16pm, Edgar =?iso-8859-1?B?RnXf?= wrote:
} Subject: repeated panics in mutex_vector_enter (from unp_thread)
} Since a few days, I'm experiencing repeated panics in mutex_vector_enter.
} Nothing was changed to the server in question, probably, it's experiencing more 
} load/forks than before. The machine is still on 6.1, but I can't tell whether 
} the problem is version specific.
} 
} The tracebacks look similar (third and fourth coulumn in "show reg" output are 
} from subsequend panics, missing values mean same as first one):
} 
} uvm_fault(0xffffffff8076d460, 0x0, 1) -> e
} fatal page fault in supervisor mode
} trap type 6 code 0 rip ffffffff8027663b cs 8 rflags 10286 cr2  8 cpl 0 rsp fffffe811d83bbc0
} kernel: page fault trap, code=0
} Stopped in pid 0.67 (system) at netbsd:mutex_vector_enter+0x32c:	movq	1
} 8(%rdx),%rax
} db{5}> bt
} mutex_vector_enter() at netbsd:mutex_vector_enter+0x32c
} unp_thread() at netbsd:unp_thread+0x2eb
} db{5}> show reg
} ds	64Y						?
} es	d2a0			6405			?
} fs	269d			563			563
} gs	0
} rdi	fffffe834689f040	fffffe83471f1700	fffffe83481f1700
} rsi	1000
} rbp	fffffe811d83bc20	fffffe811d811c20	fffffe811d811c20
} rbx	fffffe834689f040	fffffe83481f1700	fffffe83481f1700
} rdx	fffffffffffffff0
} rcx	fffffffffffffff0
} rax	fffffe811d7ed2a0
} r8	fffffe811d7ed2a0
} r9	0
} r10	0
} r11	2			1			1
} r12	0
} r13	0
} r14	fffffe811d7ed2a0
} r15	0
} rip	fffffff8027663b	mutex_vector_enter+0x32c
} cs	8
} rflags	10286
} rsp	fffffe811d83bbc0	fffffe811d811bc0	fffffe811d811bc0
} ss	0
} netbsd:mutex_vector_enter+0x32c:	movq	18(%rdx),%rax
} db{5}> reboot 4
} 
} The machine than hangs hard, I need to press reset.
>-- End of excerpt from Edgar =?iso-8859-1?B?RnXf?=