On 24.06.2013 13:36, Namjae Jeon wrote:

Currently, we can try implementing dave's suggesstion of introducing a
new flag FALLOC_FL_COLLAPSE_RANGE for falloctae instead of individual
ioctls for both XFS and EXT4. Thanks.

Hi,

Currently PUNCH_HOLE requires KEEP_SIZE to be set as well. I think there
is no need to invent COLLAPSE_RANGE, but instead fallocate should
support PUNCH_HOLE without KEEP_SIZE. However I'm not sure that putting
block alignment restriction is a right way to go.

Regards,
Andrey.