Re: panic: assertion: error == 0 in hammer_start_transaction

["Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>]

Rumko wrote:
> Matthew Dillon wrote:
>
> > :...
> > :few "RPC timeout for server 192.168.0.16" before the network starts working
> > :and goes on booting, but if I run the vkernel under gdb, I only get perhaps
> > :2 of those messages and after that nothing happens - gets stuck) which was
> > :semi-diskless (root on nfs, and one hammer fs partition on the first vkd,
> > :but since it was stuck at the RPC timeout messages it shouldn't have gotten
> > :far enough to mount the root, let alone the local hammer partition - unless
> > :it started booting sometime during the night).
> > :
> > :The backtrace:
> > :panic: assertion: error == 0 in hammer_start_transaction
> > :mp_lock = 00000000; cpuid = 0
> > :Trace beginning at frame 0xe28c9968
> > :panic(e28c998c,c02c6806,e28c9a84,c39a6738,e28c99a8) at panic+0x14d
> > :...
> > :The dump is located at leaf:~rumko/crash/{kernel,vmcore}.0
> > :
> > :The kernel was compiled on the 2nd January around noon CET ... so the
> > :sources should have been from around then as well.
> > :--
> > :Regards,
> > :Rumko
> >
> >     Looking at the core the error code was 6, ENXIO, which implies
> >     the underlying block device to the HAMMER filesystem went away.
> >
> >     It looks like a HAMMER mount on /mnt, backed by a VN device
> >     (/dev/vn0s1a):
> >
> >     f_mntonname = "/mnt", '\0' <repeats 75 times>,
> >     f_mntfromname = "VROOT", '\0' <repeats 74 times>,
> >
> >     vol_name = 0xe1c84080 "/dev/vn0s1a",
> >
> >     My guess is that your VN device is backed by a file over NFS
> >     and NFS errored out.
> >
> > -Matt
> > Matthew Dillon
> > <dillon@backplane.com>
>
> Ah damn. In that case nevermind, I wonder what I was doing, hm.

Still shouldn't panic or something, no?

cheers
  simon

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