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authorChristoph Hellwig <hch@infradead.org>2010-02-15 09:44:49 +0000
committerAlex Elder <aelder@sgi.com>2010-03-01 16:34:45 -0600
commit66d834ea603d61bd90fedad90300ca91c5bba0a3 (patch)
treef73072b9d87bd71a0739f07e4d0e26f10c5d925a /fs/xfs
parentfd3200bef7d66ed3924f72c79a465fb7ff85478a (diff)
xfs: implement optimized fdatasync
Allow us to track the difference between timestamp and size updates by using mark_inode_dirty from the I/O completion code, and checking the VFS inode flags in xfs_file_fsync. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Alex Elder <aelder@sgi.com>
Diffstat (limited to 'fs/xfs')
-rw-r--r--fs/xfs/linux-2.6/xfs_aops.c4
-rw-r--r--fs/xfs/linux-2.6/xfs_file.c23
-rw-r--r--fs/xfs/linux-2.6/xfs_iops.c10
-rw-r--r--fs/xfs/xfs_inode.h1
4 files changed, 25 insertions, 13 deletions
diff --git a/fs/xfs/linux-2.6/xfs_aops.c b/fs/xfs/linux-2.6/xfs_aops.c
index 66abe36c121..ce369a816ce 100644
--- a/fs/xfs/linux-2.6/xfs_aops.c
+++ b/fs/xfs/linux-2.6/xfs_aops.c
@@ -187,7 +187,7 @@ xfs_setfilesize(
isize = xfs_ioend_new_eof(ioend);
if (isize) {
ip->i_d.di_size = isize;
- xfs_mark_inode_dirty_sync(ip);
+ xfs_mark_inode_dirty(ip);
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
@@ -341,7 +341,7 @@ xfs_submit_ioend_bio(
* but don't update the inode size until I/O completion.
*/
if (xfs_ioend_new_eof(ioend))
- xfs_mark_inode_dirty_sync(XFS_I(ioend->io_inode));
+ xfs_mark_inode_dirty(XFS_I(ioend->io_inode));
submit_bio(wbc->sync_mode == WB_SYNC_ALL ?
WRITE_SYNC_PLUG : WRITE, bio);
diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c
index 6c283b7be8a..43f9554adaa 100644
--- a/fs/xfs/linux-2.6/xfs_file.c
+++ b/fs/xfs/linux-2.6/xfs_file.c
@@ -97,16 +97,6 @@ xfs_iozero(
return (-status);
}
-/*
- * We ignore the datasync flag here because a datasync is effectively
- * identical to an fsync. That is, datasync implies that we need to write
- * only the metadata needed to be able to access the data that is written
- * if we crash after the call completes. Hence if we are writing beyond
- * EOF we have to log the inode size change as well, which makes it a
- * full fsync. If we don't write beyond EOF, the inode core will be
- * clean in memory and so we don't need to log the inode, just like
- * fsync.
- */
STATIC int
xfs_file_fsync(
struct file *file,
@@ -139,7 +129,18 @@ xfs_file_fsync(
*/
xfs_ilock(ip, XFS_ILOCK_SHARED);
- if (ip->i_update_core) {
+ /*
+ * First check if the VFS inode is marked dirty. All the dirtying
+ * of non-transactional updates no goes through mark_inode_dirty*,
+ * which allows us to distinguish beteeen pure timestamp updates
+ * and i_size updates which need to be caught for fdatasync.
+ * After that also theck for the dirty state in the XFS inode, which
+ * might gets cleared when the inode gets written out via the AIL
+ * or xfs_iflush_cluster.
+ */
+ if (((dentry->d_inode->i_state & I_DIRTY_DATASYNC) ||
+ ((dentry->d_inode->i_state & I_DIRTY_SYNC) && !datasync)) &&
+ ip->i_update_core) {
/*
* Kick off a transaction to log the inode core to get the
* updates. The sync transaction will also force the log.
diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index e8566bbf0f0..61a99608731 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -91,6 +91,16 @@ xfs_mark_inode_dirty_sync(
mark_inode_dirty_sync(inode);
}
+void
+xfs_mark_inode_dirty(
+ xfs_inode_t *ip)
+{
+ struct inode *inode = VFS_I(ip);
+
+ if (!(inode->i_state & (I_WILL_FREE|I_FREEING|I_CLEAR)))
+ mark_inode_dirty(inode);
+}
+
/*
* Change the requested timestamp in the given inode.
* We don't lock across timestamp updates, and we don't log them but
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index 6c912b02759..41e8a4e2e3b 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -480,6 +480,7 @@ void xfs_lock_inodes(xfs_inode_t **, int, uint);
void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
void xfs_synchronize_times(xfs_inode_t *);
+void xfs_mark_inode_dirty(xfs_inode_t *);
void xfs_mark_inode_dirty_sync(xfs_inode_t *);
#define IHOLD(ip) \