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| author | Alexey Dobriyan <adobriyan@sw.ru> | 2008-02-08 04:18:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-08 09:22:23 -0800 |
| commit | 4237e0d3de38da640d7c977d68f5f7f1d207a631 (patch) | |
| tree | 0bf02984aef945c5d97a5929b82e7ecd6b7f39ed /fs/proc | |
| parent | 5b3fe63b19e00f3b2a14a09c979e84163029e390 (diff) | |
| download | linux-4237e0d3de38da640d7c977d68f5f7f1d207a631.tar.gz linux-4237e0d3de38da640d7c977d68f5f7f1d207a631.tar.bz2 linux-4237e0d3de38da640d7c977d68f5f7f1d207a631.zip | |
proc: less LOCK operations during lookup
Pseudo-code for lookup effectively is:
LOCK kernel
LOCK proc_subdir_lock
find PDE
UNLOCK proc_subdir_lock
get inode
LOCK proc_subdir_lock
goto unlock
UNLOCK proc_subdir_lock
UNLOCK kernel
We can get rid of LOCK/UNLOCK pair after getting inode simply by jumping
to unlock_kernel() directly.
Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc')
| -rw-r--r-- | fs/proc/generic.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/proc/generic.c b/fs/proc/generic.c index 6a2fe5187b62..75cd8d709f7f 100644 --- a/fs/proc/generic.c +++ b/fs/proc/generic.c @@ -406,12 +406,12 @@ struct dentry *proc_lookup(struct inode * dir, struct dentry *dentry, struct nam spin_unlock(&proc_subdir_lock); error = -EINVAL; inode = proc_get_inode(dir->i_sb, ino, de); - spin_lock(&proc_subdir_lock); - break; + goto out_unlock; } } } spin_unlock(&proc_subdir_lock); +out_unlock: unlock_kernel(); if (inode) { |