block allocations for the refcount btree

[Christoph Hellwig]

On Wed, Mar 02, 2016 at 08:41:02AM -0800, Darrick J. Wong wrote:
> Hmm, I'll give it a spin when I get in later.  Can you send me xfs_info
> output so I can try to construct an equivalent reproducer setup?

root at vm:~/xfstests# xfs_info /mnt/scratch/
meta-data=/dev/vdc               isize=512    agcount=320, agsize=8192 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=1 spinodes=0 rmapbt=0
         =                       reflink=1
data     =                       bsize=4096   blocks=2621440, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=2560, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0