Btrfs: add pinned extents to on-disk free space cache correctly
authorLi Zefan <lizf@cn.fujitsu.com>
Tue, 10 Jan 2012 08:41:01 +0000 (16:41 +0800)
committerLi Zefan <lizf@cn.fujitsu.com>
Wed, 11 Jan 2012 02:26:31 +0000 (10:26 +0800)
I got this while running xfstests:

[24256.836098] block group 317849600 has an wrong amount of free space
[24256.836100] btrfs: failed to load free space cache for block group 317849600

We should clamp the extent returned by find_first_extent_bit(),
so the start of the extent won't smaller than the start of the
block group.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>

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