From 598dbdf2433cad55bd44d923f67a053871e3eabf Mon Sep 17 00:00:00 2001
From: Robin Dong <sanbai@taobao.com>
Date: Mon, 11 Jul 2011 18:24:01 -0400
Subject: [PATCH] ext4: avoid unneeded ext4_ext_next_leaf_block() while
inserting extents
Optimize ext4_ext_insert_extent() by avoiding
ext4_ext_next_leaf_block() when the result is not used/needed.
Signed-off-by: Robin Dong <sanbai@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---
fs/ext4/extents.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 9cbdcb2110f5..f1c538e5055c 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1730,9 +1730,10 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
/* probably next leaf has space for us? */
fex = EXT_LAST_EXTENT(eh);
- next = ext4_ext_next_leaf_block(inode, path);
- if (le32_to_cpu(newext->ee_block) > le32_to_cpu(fex->ee_block)
- && next != EXT_MAX_BLOCKS) {
+ next = EXT_MAX_BLOCKS;
+ if (le32_to_cpu(newext->ee_block) > le32_to_cpu(fex->ee_block))
+ next = ext4_ext_next_leaf_block(inode, path);
+ if (next != EXT_MAX_BLOCKS) {
ext_debug("next leaf block - %d\n", next);
BUG_ON(npath != NULL);
npath = ext4_ext_find_extent(inode, next, NULL);
--
2.34.1