Commit f58a1ebb authored Jun 25, 2006 by Hua Zhong Committed by Linus Torvalds Jun 25, 2006

[PATCH] remove unlikely(sb) in prune_dcache



likely profiling shows that the following is a miss.

After boot:
[+- ] Type | # True | # False | Function:Filename@Line
+unlikely |     1074|        0  prune_dcache()@:fs/dcache.c@409

After a bonnie++ run:
+unlikely |    66716|    19584  prune_dcache()@:fs/dcache.c@409

So remove it.

Signed-off-by: Hua Zhong <hzhong@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent d84a8477

fs/dcache.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -406,7 +406,7 @@ static void prune_dcache(int count, struct super_block *sb)
	cond_resched_lock(&dcache_lock);		cond_resched_lock(&dcache_lock);

	tmp = dentry_unused.prev;		tmp = dentry_unused.prev;
	if (unlikely(sb)) {		if (sb) {
	/* Try to find a dentry for this sb, but don't try		/* Try to find a dentry for this sb, but don't try
	* too hard, if they aren't near the tail they will		* too hard, if they aren't near the tail they will
	* be moved down again soon		* be moved down again soon