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xfs: don't run the sync work if the filesystem is read-only

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If the filesystem is mounted or remounted read-only, stop the sync
worker that tries to flush or cover the log if the filesystem is
dirty. It's read-only, so it isn't dirty. Restart it on a remount,rw
as necessary. This avoids the need for RO checks in the work.

Similarly, stop the sync work when the filesystem is frozen, and
start it again when the filesysetm is thawed. This avoids the need
for special freeze checks in the work.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner 2012-10-08 21:56:01 +11:00 • committed by Ben Myers
parent 7e18530bef
commit 7f7bebefba
2 changed files with 18 additions and 13 deletions
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2
fs/xfs/xfs_super.c
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@ -1200,6 +1200,7 @@ xfs_fs_remount(
* value if it is non-zero, otherwise go with the default.
*/
xfs_restore_resvblks(mp);
xfs_syncd_queue_sync(mp);
}
/* rw -> ro */
@ -1245,6 +1246,7 @@ xfs_fs_unfreeze(
struct xfs_mount *mp = XFS_M(sb);
xfs_restore_resvblks(mp);
xfs_syncd_queue_sync(mp);
return 0;
}