QA output created by 308
Format
We need AG1 to have a single free extent
Find our extent and old counter values
Remove the extent from the freesp btrees
Add the extent to the refcount btree
Look for leftover warning in xfs_check
leftover CoW extent (NR/NR) len NR
Look for leftover warning in xfs_repair
leftover CoW extent (NR/NR) len NR
Mount filesystem
Look for no more leftover warning in xfs_check
Look for no more leftover warning in xfs_repair
