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authorSteven Whitehouse <swhiteho@redhat.com>2011-06-15 10:29:37 +0100
committerSteven Whitehouse <swhiteho@redhat.com>2011-07-15 09:31:48 +0100
commit17d539f0499fa2c0321b7c260831cca2bb36d119 (patch)
tree28b960ad670a0112d45afbab120f855b8e95b146 /fs/gfs2/main.c
parent5dcd07b9f39ca3e9be5bcc387d193fc0674e1c81 (diff)
downloadop-kernel-dev-17d539f0499fa2c0321b7c260831cca2bb36d119.zip
op-kernel-dev-17d539f0499fa2c0321b7c260831cca2bb36d119.tar.gz
GFS2: Cache dir hash table in a contiguous buffer
This patch adds a cache for the hash table to the directory code in order to help simplify the way in which the hash table is accessed. This is intended to be a first step towards introducing some performance improvements in the directory code. There are two follow ups that I'm hoping to see fairly shortly. One is to simplify the hash table reading code now that we always read the complete hash table, whether we want one entry or all of them. The other is to introduce readahead on the heads of the hash chains which are referred to from the table. The hash table is a maximum of 128k in size, so it is not worth trying to read it in small chunks. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/main.c')
-rw-r--r--fs/gfs2/main.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index c2b34cd..29e1ace 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -41,6 +41,7 @@ static void gfs2_init_inode_once(void *foo)
init_rwsem(&ip->i_rw_mutex);
INIT_LIST_HEAD(&ip->i_trunc_list);
ip->i_alloc = NULL;
+ ip->i_hash_cache = NULL;
}
static void gfs2_init_glock_once(void *foo)
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