Date: Thu, 10 Jun 2004 20:34:10 +1000 (EST) From: Andy Farkas <andyf@speednet.com.au> To: Bruce Evans <bde@zeta.org.au> Cc: "'current@freebsd.org'" <current@freebsd.org> Subject: Re: kernel trap 19 with interrupts disabled Message-ID: <20040610202545.E9618@hewey.af.speednet.com.au> In-Reply-To: <20040610194112.S8078@gamplex.bde.org> References: <FE045D4D9F7AED4CBFF1B3B813C85337051D8F48@mail.sandvine.com> <20040610194112.S8078@gamplex.bde.org>
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Bruce Evans wrote:
> Don Bowman wrote:
>
...
> > kernel trap 19 with interrupts disabled
> > NMI ... going to debugger
...
>
> It means that the NMI was serviced by a CPU that has interrupts disabled
> at the CPU level. The message for this is a little spurious because NMI
> by definition is supposed to be able to occur when interrupts are masked,
> but it can be useful to know when an unexpected or even an expected trap
> occurs with interrupts disabled. Here it tells us that the interrupt
> may really have needed to be non-maskable to break into some code that is
> looping with interrupts disabled.
My box did the following the other day (its a quad ppro-200 with ecc ram;
dell 6100/200). I'd like to know if it is safe to continue running the
kernel as is, or should it be rebooted? I pressed 'c' at the debugger
prompt and nothing bad has happened so far. I've rebooted since.
Jun 6 17:44:47 <kern.crit> hummer kernel: NMI ISA a8, EISA 0
Jun 6 17:44:47 <kern.crit> hummer kernel: RAM parity error, likely hardware failure.
Jun 6 17:44:47 <kern.crit> hummer kernel:
Jun 6 17:44:47 <kern.crit> hummer kernel: Fatal trap 19: non-maskable interrupt trap while in kernel mode
Jun 6 17:44:47 <kern.crit> hummer kernel: cpuid = 0; apic id = 00
Jun 6 17:44:47 <kern.crit> hummer kernel: instruction pointer = 0x8:0xc049cd12
Jun 6 17:44:47 <kern.crit> hummer kernel: stack pointer = 0x10:0xd7d0ac70
Jun 6 17:44:47 <kern.crit> hummer kernel: frame pointer = 0x10:0xd7d0ac9c
Jun 6 17:44:47 <kern.crit> hummer kernel: code segment = base 0x0, limit 0xfffff, type 0x1b
Jun 6 17:44:47 <kern.crit> hummer kernel: = DPL 0, pres 1, def32 1, gran 1
Jun 6 17:44:47 <kern.crit> hummer kernel: processor eflags = interrupt enabled, resume, IOPL = 0
Jun 6 17:44:47 <kern.crit> hummer kernel: current process = 43 (irq14: ata0)
Jun 6 17:44:48 <kern.crit> hummer kernel: kernel: type 19 trap, code=0
(yes, there is a blank "kernel:" line!)
--
:{ andyf@speednet.com.au
Andy Farkas
System Administrator
Speednet Communications
http://www.speednet.com.au/
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