From deeb5912db12e8b7ccf3f4b1afaad60bc29abed9 Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sandeen@sandeen.net>
Date: Fri, 18 Jul 2008 17:12:18 +1000
Subject: [XFS] 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.
SGI-PV: 983924
SGI-Modid: xfs-linux-melb:xfs-kern:31377a
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
---
fs/xfs/linux-2.6/xfs_super.c | 8 --------
1 file changed, 8 deletions(-)
(limited to 'fs/xfs/linux-2.6/xfs_super.c')
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 7c621dfee73d..fcb4931902ac 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -746,14 +746,6 @@ xfs_mountfs_check_barriers(xfs_mount_t *mp)
return;
}
- if (mp->m_ddev_targp->bt_bdev->bd_disk->queue->ordered ==
- QUEUE_ORDERED_NONE) {
- xfs_fs_cmn_err(CE_NOTE, mp,
- "Disabling barriers, not supported by the underlying device");
- mp->m_flags &= ~XFS_MOUNT_BARRIER;
- return;
- }
-
if (xfs_readonly_buftarg(mp->m_ddev_targp)) {
xfs_fs_cmn_err(CE_NOTE, mp,
"Disabling barriers, underlying device is readonly");
--
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