Commit f58a1ebb authored by Hua Zhong's avatar Hua Zhong Committed by Linus Torvalds

[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: default avatarHua Zhong <hzhong@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d84a8477
...@@ -406,7 +406,7 @@ static void prune_dcache(int count, struct super_block *sb) ...@@ -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
......
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