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authorDave Chinner <dchinner@redhat.com>2010-09-22 10:47:20 +1000
committerAlex Elder <aelder@sgi.com>2010-10-18 15:07:50 -0500
commit1922c949c59f93beb560d59874bcc6d5c00115ac (patch)
treef680f7cc4a36f9233f2c54c473a69a658ea9e224 /fs/xfs/xfs_fsops.c
parent26af655233dd486659235f3049959d2f7dafc5a1 (diff)
xfs: use unhashed buffers for size checks
When we are checking we can access the last block of each device, we do not need to use cached buffers as they will be tossed away immediately. Use uncached buffers for size checks so that all IO prior to full in-memory structure initialisation does not use the buffer cache. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_fsops.c')
-rw-r--r--fs/xfs/xfs_fsops.c11
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 43b1d569933..6a1edb1348f 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -144,12 +144,11 @@ xfs_growfs_data_private(
if ((error = xfs_sb_validate_fsb_count(&mp->m_sb, nb)))
return error;
dpct = pct - mp->m_sb.sb_imax_pct;
- error = xfs_read_buf(mp, mp->m_ddev_targp,
- XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
- XFS_FSS_TO_BB(mp, 1), 0, &bp);
- if (error)
- return error;
- ASSERT(bp);
+ bp = xfs_buf_read_uncached(mp, mp->m_ddev_targp,
+ XFS_FSB_TO_BB(mp, nb) - XFS_FSS_TO_BB(mp, 1),
+ BBTOB(XFS_FSS_TO_BB(mp, 1)), 0);
+ if (!bp)
+ return EIO;
xfs_buf_relse(bp);
new = nb; /* use new as a temporary here */