path: root/kernel
diff options
authorChristoph Hellwig <hch@infradead.org>2010-10-10 05:36:23 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2010-10-25 21:26:12 -0400
commit312d3ca856d369bb04d0443846b85b4cdde6fa8a (patch)
treecf95d01cffaf02bf53c2bb0f7c2c924279ec6eeb /kernel
parent9c82ab9c9e16cb9edf17bd0d31f3d6904afce04f (diff)
fs: use percpu counter for nr_dentry and nr_dentry_unused
The nr_dentry stat is a globally touched cacheline and atomic operation twice over the lifetime of a dentry. It is used for the benfit of userspace only. Turn it into a per-cpu counter and always decrement it in d_free instead of doing various batching operations to reduce lock hold times in the callers. Based on an earlier patch from Nick Piggin <npiggin@suse.de>. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 99a510cbfbb3..8b77ff5c502c 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1377,7 +1377,7 @@ static struct ctl_table fs_table[] = {
.data = &dentry_stat,
.maxlen = 6*sizeof(int),
.mode = 0444,
- .proc_handler = proc_dointvec,
+ .proc_handler = proc_nr_dentry,
.procname = "overflowuid",

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