path: root/fs/gfs2/inode.h
diff options
authorSteven Whitehouse <swhiteho@redhat.com>2008-01-28 10:37:35 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2008-03-31 10:39:46 +0100
commitecc30c79157103e8bd7492043ee992b763443832 (patch)
tree51b1af9b58dfcf1b561888a6752255ac86070808 /fs/gfs2/inode.h
parent[GFS2] Speed up gfs2_write_alloc_required, deprecate gfs2_extent_map (diff)
[GFS2] Streamline indirect pointer tree height calculation
This patch improves the calculation of the tree height in order to reduce the number of operations which are carried out on each call to gfs2_block_map. In the common case, we now make a single comparison, rather than calculating the required tree height from scratch each time. Also in the case that the tree does need some extra height, we start from the current height rather from zero when we work out what the new height ought to be. In addition the di_height field is moved into the inode proper and reduced in size to a u8 since the value must be between 0 and GFS2_MAX_META_HEIGHT (10). Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/inode.h')
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index d44650662615..db738686ca1d 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -12,7 +12,7 @@
static inline int gfs2_is_stuffed(const struct gfs2_inode *ip)
- return !ip->i_di.di_height;
+ return !ip->i_height;
static inline int gfs2_is_jdata(const struct gfs2_inode *ip)