commit 154ea2893002618bc3f9a1e2d8186c65490968b1
author Chris Mason <chris.mason@fusionio.com> Tue Mar 05 11:11:26 2013 -0500
committer Chris Mason <chris.mason@fusionio.com> Tue Mar 05 11:30:16 2013 -0500
tree 5a74f2ccc965aef784891a29d1ded2b8610257a7
parent d7011f5b9dd3c88feb5cebad7d0b719ed6816ebd

Btrfs: enforce min_bytes parameter during extent allocation

Commit 24542bf7ea5e4fdfdb5157ff544c093fa4dcb536 changed preallocation of
extents to cap the max size we try to allocate.  It's a valid change,
but the extent reservation code is also used by balance, and that
can't tolerate a smaller extent being allocated.

__btrfs_prealloc_file_range already has a min_size parameter, which is
used by relocation to request a specific extent size.  This commit
adds an extra check to enforce that minimum extent size.

Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Reported-by: Stefan Behrens <sbehrens@giantdisaster.de>