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authorChristoph Hellwig <hch@infradead.org>2009-10-06 20:29:28 +0000
committerAlex Elder <aelder@sgi.com>2009-10-08 12:01:03 -0500
commit69961a26b82931601e07c9e3656bd90c598f2395 (patch)
tree0798e1feac2cebe0327affef4a63bdf6fd11ff02 /fs
parentc90b07e8dd9f263d2e2af1d9648ba269f4d0d8fd (diff)
xfs: cleanup ->sync_fs
Sort out ->sync_fs to not perform a superblock writeback for the wait = 0 case as that is just an optional first pass and the superblock will be written back properly in the next call with wait = 1. Instead perform an opportunistic quota writeback to have less work later. Also remove the freeze special case as we do a proper wait = 1 call in the freeze code anyway. Also rename the function to xfs_fs_sync_fs to match the normal naming convention, update comments and avoid calling into the laptop_mode logic on an error. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/xfs/linux-2.6/xfs_super.c36
1 files changed, 18 insertions, 18 deletions
diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 1ea65b6e5ab..eefea0d9d03 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -1148,7 +1148,7 @@ xfs_fs_put_super(
}
STATIC int
-xfs_fs_sync_super(
+xfs_fs_sync_fs(
struct super_block *sb,
int wait)
{
@@ -1156,23 +1156,23 @@ xfs_fs_sync_super(
int error;
/*
- * Treat a sync operation like a freeze. This is to work
- * around a race in sync_inodes() which works in two phases
- * - an asynchronous flush, which can write out an inode
- * without waiting for file size updates to complete, and a
- * synchronous flush, which wont do anything because the
- * async flush removed the inode's dirty flag. Also
- * sync_inodes() will not see any files that just have
- * outstanding transactions to be flushed because we don't
- * dirty the Linux inode until after the transaction I/O
- * completes.
+ * Not much we can do for the first async pass. Writing out the
+ * superblock would be counter-productive as we are going to redirty
+ * when writing out other data and metadata (and writing out a single
+ * block is quite fast anyway).
+ *
+ * Try to asynchronously kick off quota syncing at least.
*/
- if (wait || unlikely(sb->s_frozen == SB_FREEZE_WRITE))
- error = xfs_quiesce_data(mp);
- else
- error = xfs_sync_fsdata(mp, 0);
+ if (!wait) {
+ xfs_qm_sync(mp, SYNC_TRYLOCK);
+ return 0;
+ }
+
+ error = xfs_quiesce_data(mp);
+ if (error)
+ return -error;
- if (unlikely(laptop_mode)) {
+ if (laptop_mode) {
int prev_sync_seq = mp->m_sync_seq;
/*
@@ -1191,7 +1191,7 @@ xfs_fs_sync_super(
mp->m_sync_seq != prev_sync_seq);
}
- return -error;
+ return 0;
}
STATIC int
@@ -1565,7 +1565,7 @@ static struct super_operations xfs_super_operations = {
.write_inode = xfs_fs_write_inode,
.clear_inode = xfs_fs_clear_inode,
.put_super = xfs_fs_put_super,
- .sync_fs = xfs_fs_sync_super,
+ .sync_fs = xfs_fs_sync_fs,
.freeze_fs = xfs_fs_freeze,
.statfs = xfs_fs_statfs,
.remount_fs = xfs_fs_remount,