panic: System call lstat returning with 1 locks held
Attilio Rao
attilio at freebsd.org
Tue Feb 5 08:38:22 PST 2008
2008/2/5, Yar Tikhiy <yar at comp.chem.msu.su>:
> BTW, I seem to be hitting yet another lockmgr-related panic.
>
> My system won't reboot under certain conditions: it'll panic instead
> in vfs_unmountall(). Namely it will panic if I reboot from single-user
> mode while it'll reboot OK from multi-user mode. I have no idea
> yet about the exact reason for the behaviour. The output from kgdb
> attached.
>
> Note that this panic shouldn't be NTFS-related as I can trigger it
> by typing `reboot' immediately after booting into single user.
Yes, sorry for this.
I know of this and I alredy patched my tree.
I did the WITNESS stuff based on the assumption drained lock will
never be release while they are. Unmounting is currently the only one
consumer of LK_DRAIN I know of and I just need to do a WITNESS_LOCK()
over there.
I will provide you an updated patch about this problem and another one
found by kris at .
I will look later at the backtrace so we can go on.
Thanks,
Attilio
--
Peace can only be achieved by understanding - A. Einstein
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