[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-ID: <200911252209432039291@gmail.com>
Date: Wed, 25 Nov 2009 22:09:45 +0800
From: "Liuweni" <qingshenlwy@...il.com>
To: "linux-kernel" <linux-kernel@...r.kernel.org>
Cc: "strongzgy" <strongzgy@...il.com>, "xgr178" <xgr178@....com>,
"Liu Hui" <onlyflyer@...il.com>, "viro" <viro@...iv.linux.org.uk>,
"akpm" <akpm@...ux-foundation.org>, "jack" <jack@...e.cz>,
"npiggin" <npiggin@...e.de>,
"linux-fsdevel" <linux-fsdevel@...r.kernel.org>,
"linux-kernel" <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/3]fs/inode: iunique() Optimize Performance
---
move the if condition out the while{}.
While the function executing, the if
condition won't check again and again.
And this code won't change the function
of iunique().
---
Signed-off-by: Liuwenyi<qingshenlwy@...il.com>
Cc: Alexander Viro <viro@...iv.linux.org.uk>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Jan Kara <jack@...e.cz>
Cc: Nick Piggin <npiggin@...e.de>
Cc: linux-fsdevel@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
diff --git a/fs/inode.c b/fs/inode.c
index 4d8e3be..8ff1e99 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -838,9 +838,10 @@ ino_t iunique(struct super_block *sb, ino_t max_reserved)
ino_t res;
spin_lock(&inode_lock);
+
+ if (counter <= max_reserved)
+ counter = max_reserved + 1;
do {
- if (counter <= max_reserved)
- counter = max_reserved + 1;
res = counter++;
head = inode_hashtable + hash(sb, res);
inode = find_inode_fast(sb, head, res);
--------------
Best Regards,
Liuweni
2009-11-25
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists