Date: Tue, 11 Jan 2011 14:18:14 -0600 From: Steve Price <steve@freebsd.org> To: Pawel Jakub Dawidek <pjd@freebsd.org> Cc: Miroslav Lachman <000.fbsd@quip.cz>, freebsd-geom@freebsd.org Subject: Re: gmirror panic on RELENG_8 Message-ID: <AANLkTim1-%2BPwWpv7zDhe-eGLe6Y5k2FAg3VFyAzg7Ytq@mail.gmail.com> In-Reply-To: <20110111182302.GB1812@garage.freebsd.pl> References: <AANLkTik%2B4=UMBob=Sm9tC4LhevkPCt833Fai%2BZkUSO5B@mail.gmail.com> <4D2C546D.8010604@quip.cz> <AANLkTinfGP%2B13Kt83s8JL%2B5Nou=Nk7nG2KS5mvG0abZO@mail.gmail.com> <AANLkTin9asDHvabRerjnTZJ7=Ay%2BRN4tu=zBX_5seeaz@mail.gmail.com> <20110111182302.GB1812@garage.freebsd.pl>
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On Tue, Jan 11, 2011 at 12:23 PM, Pawel Jakub Dawidek <pjd@freebsd.org> wrote:
>
> This is very bad idea to turn live disk into a mirror, but I don't
> expect this is the reason of the panic.
Agreed. This is a dev machine with a fresh install - only 300M
used of a 300GB drive so the likelihood of something being in
the last sector of da0 is near zero. Just to be safe though I
usually dd the last sector to file just to make sure.
> Panic message and backtrace is minimum what you need to provide.
> Really, even taking photo of your screen with panic message and
> backtrace might be enough.
I'm unable to get a coredump at the moment but here's what
I typed in from a couple of screenshots I took.
SMP: AP CPU #1 Launched!
SMP: AP CPU #2 Launched!
SMP: AP CPU #3 Launched!
Fatal trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x8
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc0bd0c22
stack pointer = 0x28:0xc1020c7c
frame pointer = 0x28:0xc1020c94
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = resume, IOPL = 0
current process = 0 (swapper)
trap number = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xc08e0ef7 at kdb_backtrace+0x47
#1 0xc08b1fb7 at panic+0x117
#2 0xc0be4c93 at trap_fatal+0x323
#3 0xc0be4f10 at trap_pfault+0x270
#4 0xc0be5455 at trap+0x465
#5 0xc0bcc08c at calltrap+0x6
#6 0xc0bd45dc at lapic_handle_intr+0x4c
#7 0xc0bcc455 at Xapic_isr1+0x35
#8 0xc0bd2180 at ioapic_assign_cpu+0x230
#9 0xc0bd0e6a at intr_shuffle_irqs+0xba
#10 0xc08690bc at mi_startup+0xac
#11 0xc0474885 at begin+0x2c
Uptime: 9s
Cannot dump. Device not defined or unavailable.
Automatic reboot in 15 seconds - press a key on the console to abort
-steve
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