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List:       linux-xfs
Subject:    Re: another bug
From:       Steve Lord <lord () sgi ! com>
Date:       2000-06-09 14:32:52
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> Daniel Moore wrote:
> > 
> > (still working on the stress tests - they seem to be doing the trick)
> > 
> > I'm seeing some funny messages from xfs_zero_last_block
> > 
> > => xfs_zero_last_block: unwritten?
> > => xfs_zero_last_block: We want DELWRI? not waiting?
> > 
> > just before the page_buf panics
> > 
> > => delalloc page 0xc106951c with no extent kernel BUG at page_buf.c:5275!
> 
> 
> This looks to be a problem in handling UNWRITTEN extents,
> and this one seems to be an UNWRITTEN at that contains EOF (hmm).
> 
> Don't know the right fix to this one, but you can try avoiding
> this bug by creating the FS without support for unwritten:
> I believe the option is "-d unwritten=0" to mkfs_xfs.
> 
> 
> --------------------------------------------------------------------------
> Rajagopal Ananthanarayanan ("ananth")
> Member Technical Staff, SGI.
> --------------------------------------------------------------------------


We should really have unwritten extents turned off - probably should change
mkfs to default to off as well. We do not have code to handle them properly
yet.

Steve

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