tree bc73836bf0bde137da48eaff72dae75ee729aaba
parent c2a128d28a2e78e159e17e8c9274d0a9d9492555
author Josef Bacik <josef@redhat.com> 1265143874 +0000
committer Chris Mason <chris.mason@oracle.com> 1268665213 -0400

Btrfs: cache ordered extent when completing io

When finishing io we run btrfs_dec_test_ordered_pending, and then immediately
run btrfs_lookup_ordered_extent, but btrfs_dec_test_ordered_pending does that
already, so we're searching twice when we don't have to.  This patch lets us
pass a btrfs_ordered_extent in to btrfs_dec_test_ordered_pending so if we do
complete io on that ordered extent we can just use the one we found then instead
of having to do another btrfs_lookup_ordered_extent.  This made my fio job with
the other patch go from 24 mb/s to 29 mb/s.

Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>