Disable queue flag test in barrier check.
md raid1 can pass down barriers, but does not set an ordered flag
on the queue, so xfs does not even attempt a barrier write, and
will never use barriers on these block devices.
Remove the flag check and just let the barrier write
test determine barrier support.
A possible risk here is that if something does not set an ordered
flag and also does not properly return an error on a barrier write...
but if it's any consolation jbd/ext3/reiserfs never test the flag,
and don't even do a test write, they just disable barriers the first
time an actual journal barrier write fails.
Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Tue Jul 1 15:59:48 AEST 2008
Inspected by: sandeen@xxxxxxxxxxx
The following file(s) were checked into:
fs/xfs/linux-2.6/xfs_super.c - 1.433 - changed
- disable queue flag test in barrier check