GFS2: Use ->dirty_inode()

The aim of this patch is to use the newly enhanced ->dirty_inode()
super block operation to deal with atime updates, rather than
piggy backing that code into ->write_inode() as is currently
done.

The net result is a simplification of the code in various places
and a reduction of the number of gfs2_dinode_out() calls since
this is now implied by ->dirty_inode().

Some of the mark_inode_dirty() calls have been moved under glocks
in order to take advantage of then being able to avoid locking in
->dirty_inode() when we already have suitable locks.

One consequence is that generic_write_end() now correctly deals
with file size updates, so that we do not need a separate check
for that afterwards. This also, indirectly, means that fdatasync
should work correctly on GFS2 - the current code always syncs the
metadata whether it needs to or not.

Has survived testing with postmark (with and without atime) and
also fsx.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 9d12286d8111..4416a1cfa1fe 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -802,7 +802,6 @@ static int fallocate_chunk(struct inode *inode, loff_t offset, loff_t len,
 		from = 0;
 	}
 
-	gfs2_dinode_out(ip, dibh->b_data);
 	mark_inode_dirty(inode);
 
 	brelse(dibh);