diff options
| author | David Chinner <dgc@sgi.com> | 2007-05-14 08:24:23 (GMT) |
|---|---|---|
| committer | Tim Shimmin <tes@chook.melbourne.sgi.com> | 2007-10-15 06:23:45 (GMT) |
| commit | 0bfefc46dc028df60120acdb92062169c9328769 (patch) | |
| tree | ce8cecb3f4546300c0d193efa27bf14f78170b3b /fs/xfs/linux-2.6 | |
| parent | c1561cf463f4a480d1960e833c8fe628207b24e4 (diff) | |
| download | linux-0bfefc46dc028df60120acdb92062169c9328769.tar.xz | |
[XFS] Barriers need to be dynamically checked and switched off
If the underlying block device suddenly stops supporting barriers, we need
to handle the -EOPNOTSUPP error in a sane manner rather than shutting
down the filesystem. If we get this error, clear the barrier flag, reissue
the I/O, and tell the world bad things are occurring.
SGI-PV: 964544
SGI-Modid: xfs-linux-melb:xfs-kern:28568a
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_buf.c | 13 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_super.c | 8 |
2 files changed, 12 insertions, 9 deletions
diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index b0f0e58..8d9298c 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -997,7 +997,18 @@ xfs_buf_iodone_work( xfs_buf_t *bp = container_of(work, xfs_buf_t, b_iodone_work); - if (bp->b_iodone) + /* + * We can get an EOPNOTSUPP to ordered writes. Here we clear the + * ordered flag and reissue them. Because we can't tell the higher + * layers directly that they should not issue ordered I/O anymore, they + * need to check if the ordered flag was cleared during I/O completion. + */ + if ((bp->b_error == EOPNOTSUPP) && + (bp->b_flags & (XBF_ORDERED|XBF_ASYNC)) == (XBF_ORDERED|XBF_ASYNC)) { + XB_TRACE(bp, "ordered_retry", bp->b_iodone); + bp->b_flags &= ~XBF_ORDERED; + xfs_buf_iorequest(bp); + } else if (bp->b_iodone) (*(bp->b_iodone))(bp); else if (bp->b_flags & XBF_ASYNC) xfs_buf_relse(bp); diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index 491d1f4..17ad5e4 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -304,14 +304,6 @@ 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"); |