tree 15e54377cb925312ce0332a6520d78ae99b9fafc
parent cfbb9308463f6dad1334884db046ccf0f1a77918
author Chris Mason <chris.mason@oracle.com> 1242657718 -0400
committer Chris Mason <chris.mason@oracle.com> 1244647788 -0400

Btrfs: reduce mount -o ssd CPU usage

The block allocator in SSD mode will try to find groups of free blocks
that are close together.  This commit makes it loop less on a given
group size before bumping it.

The end result is that we are less likely to fill small holes in the
available free space, but we don't waste as much CPU building the
large cluster used by ssd mode.

Signed-off-by: Chris Mason <chris.mason@oracle.com>