Re: panic on shutdown

[Brett Lymn <blymn%baesystems.com.au@localhost>]

On Wed, Sep 10, 2008 at 09:58:22PM +0300, Stathis Kamperis wrote:
> > > Using kernels from Sunday and today, I'm seeing a panic involving
> >  >  kmem_poison_check on shutdown.  This is using amd64 on a Thinkpad T61.
> >  >  Is anyone else seeing this?  Sorry I don't have more details; I was
> >  >  concentrating more on testing if a particular PR had been resolved.
> >  >
> >  >
> >  >                 --Steve Bellovin, http://www.cs.columbia.edu/~smb
> >  >
> >
> >
> > I am seeing this also. It is triggered when unmounting mfs but I din't
> >  pay close attention to it either.
> >
> >  My system is NetBSD 4.99.72/i386, UP.
> >

Yes, there does appear to be a problem with MFS - I have seen two
behaviours when shutting down the machine:

1) Machine panics with a bad memory reference in VFS_START+0x25 -
which looks to be the unlock of the mount point

2) Machine just wedges - breaking to ddb just has it waiting on a lock

I suspect that there is some memory that is being freed but still
being used.

-- 
Brett Lymn
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