xfs: reserve AG space for the refcount btree root

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Reduce the max AG usable space size so that we always have space for
the refcount btree root.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

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Darrick J. Wong 2016-10-03 09:11:24 -07:00

parent a90c00f055

commit d0e853f360

1 changed files with 2 additions and 0 deletions

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fs/xfs/libxfs/xfs_alloc.c

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