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From 914ff1f579d4c9a64d60a1661803bf6c25a4a7a4 Mon Sep 17 00:00:00 2001
From: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Date: Mon, 20 May 2013 09:42:28 +0900
Subject: [PATCH 0456/1302] f2fs: skip get_node_page if locked node page is
passed
If get_dnode_of_data gets a locked node page, let's skip redundant
get_node_page calls.
This is for the futher enhancement.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
fs/f2fs/node.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 9641534..f63f0a4 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -408,10 +408,13 @@ int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode)
level = get_node_path(index, offset, noffset);
nids[0] = dn->inode->i_ino;
- npage[0] = get_node_page(sbi, nids[0]);
- if (IS_ERR(npage[0]))
- return PTR_ERR(npage[0]);
+ npage[0] = dn->inode_page;
+ if (!npage[0]) {
+ npage[0] = get_node_page(sbi, nids[0]);
+ if (IS_ERR(npage[0]))
+ return PTR_ERR(npage[0]);
+ }
parent = npage[0];
if (level != 0)
nids[1] = get_nid(parent, offset[0], true);
--
1.8.3.2
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