[PATCH 0/2] btrfs: defrag: don't defrag extents already at their max capacity, then remove an ambiguous check

[Qu Wenruo <wqu@suse.com>]

Thanks to the report from Filipe where he found a new bug in compressed
defrag, that we will try to defrag all compressed extents even it's
already at its max compacity.

This behavior is from the beginning of btrfs defrag.

The first patch is to fix the behavior, by just rejecting extents
which are already at their max capacity, nor allowing extents to be
merged with extents at their max capacity.

The second patch is to remove an ambiguous rejection condition.
The condition is believed to reject compressed extent, but it never
really works due to the check is > 128K, not >= 128K.

And the physically adajcent check may prevent users to reduce the number
of extents.

Qu Wenruo (2):
  btrfs: defrag: don't defrag extents which is already at its max
    capacity
  btrfs: defrag: remove an ambiguous condition for rejection

 fs/btrfs/ioctl.c | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

-- 
2.34.1