[PATCH] ufs: little directory lookup optimization
This patch make little optimization of ufs_find_entry like "ext2" does. Save
number of page and reuse it again in the next call.
Signed-off-by: Evgeniy Dushistov <dushistov@mail.ru>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/ufs/dir.c b/fs/ufs/dir.c
index 732c3fd..7f0a0aa 100644
--- a/fs/ufs/dir.c
+++ b/fs/ufs/dir.c
@@ -252,6 +252,7 @@
unsigned long start, n;
unsigned long npages = ufs_dir_pages(dir);
struct page *page = NULL;
+ struct ufs_inode_info *ui = UFS_I(dir);
struct ufs_dir_entry *de;
UFSD("ENTER, dir_ino %lu, name %s, namlen %u\n", dir->i_ino, name, namelen);
@@ -262,8 +263,8 @@
/* OFFSET_CACHE */
*res_page = NULL;
- /* start = ei->i_dir_start_lookup; */
- start = 0;
+ start = ui->i_dir_start_lookup;
+
if (start >= npages)
start = 0;
n = start;
@@ -295,7 +296,7 @@
found:
*res_page = page;
- /* ei->i_dir_start_lookup = n; */
+ ui->i_dir_start_lookup = n;
return de;
}