Re: [BUG] xfs/109 crashed 2k block size reflink enabled XFS

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Tue, Dec 06, 2016 at 10:19:46AM -0500, Brian Foster wrote:
> On Tue, Dec 06, 2016 at 06:45:59AM -0800, Christoph Hellwig wrote:
> > I think the problem is that the extents -> btree conversion does not
> > use the per-AG reservations, but it should probably use it (even if it
> > predates if of course).
> > 
> > In the reproduce the fs still has enough blocks to allocate the
> > one block for the first bmap btree leave.  But all free space sits
> > in AGs with a lower agno then what we used for allocating the actual
> > extent, and thus xfs_alloc_vextent never manages to allocate it.
> 
> Not that I have any insight into the problem here... :P but I'm still[1]
> kind of wondering how that mechanism is supposed to work when it
> ultimately calls xfs_mod_fdblocks() for each AG..?

Oh, heh, I was meaning to reply to that and never did. :(

Will go work on that!

--D

> 
> Brian
> 
> [1] http://www.spinics.net/lists/linux-xfs/msg01509.html
> 
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