syncer panic

[Tim Bishop]

On Sun, Nov 16, 2003 at 05:12:26AM -0800, Kris Kennaway wrote:
> On Sun, Nov 16, 2003 at 01:02:57PM +0000, Tim Bishop wrote:
> 
> > If it's of significance I'm running vinum to mirror my /, /usr, and
> > swap partitions.
> 
> There have been quite a few vinum PRs coming in lately, so this is a
> likely candidate.  A gdb backtrace is needed to go much further
> though.

Just revisiting this since the machine has finally paniced again. I set
a dump device in rc.conf but when the machine paniced I got this:

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x14
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xc0166429
stack pointer           = 0x10:0xd60359cc
frame pointer           = 0x10:0xd6035a00
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         = 27 (syncer)
trap number             = 12
panic: page fault

syncing disks, buffers remaining... 

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x14
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xc0166429
stack pointer           = 0x10:0xd60355cc
frame pointer           = 0x10:0xd6035600
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         = 27 (syncer)
trap number             = 12
panic: page fault
Uptime: 26d17h29m23s
Dumping 496 MB
ata0: resetting devices ..
done
ad0: timeout waiting for DRQata0: resetting devices ..
ata0-slave: timeout waiting for cmd=ec s=00 e=00
ata0-slave: ATA identify failed
done
ad0: timeout waiting for DRQata0: resetting devices ..
done
ad0: timeout waiting for DRQata0: resetting devices ..
done
ad0: timeout waiting for DRQ

Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x28
fault code              = supervisor write, page not present
instruction pointer     = 0x8:0xc0131c20
stack pointer           = 0x10:0xd603515c
frame pointer           = 0x10:0xd60351b4
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         = 27 (syncer)
trap number             = 12
panic: page fault
Uptime: 26d17h29m29s
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...

This was followed by a normal bootup and then:

savecore: no dumps found

As I've said, I am using vinum to mirror my swap. However, I set dumpdev
to point to one half of the mirror directly. My reasoning for this was
that if vinum had died the kernel wouldn't be able to dump to a vinum
controlled device.

Any thoughts on how I can procede?

Cheers,
Tim.

-- 
Tim Bishop
http://www.bishnet.net/tim
PGP Key: 0x5AE7D984