Btrfs: switch back to wait_on_page_writeback to wait on metadata writes

The extent based waiting was using more CPU, and other fixes have helped
with the unplug storm problems.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2008-11-18 12:13:12 -05:00
commit 105d931d48