2008/2/5, Yar Tikhiy <yar@comp.chem.msu.su>:
quoted text
> 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@.

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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