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-rw-r--r--fs/dcache.c19
1 files changed, 13 insertions, 6 deletions
diff --git a/fs/dcache.c b/fs/dcache.c
index f62ba90..b2cb266 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -67,13 +67,22 @@ struct dentry_stat_t dentry_stat = {
.age_limit = 45,
};
-static struct percpu_counter nr_dentry __cacheline_aligned_in_smp;
+static DEFINE_PER_CPU(unsigned int, nr_dentry);
#if defined(CONFIG_SYSCTL) && defined(CONFIG_PROC_FS)
+static int get_nr_dentry(void)
+{
+ int i;
+ int sum = 0;
+ for_each_possible_cpu(i)
+ sum += per_cpu(nr_dentry, i);
+ return sum < 0 ? 0 : sum;
+}
+
int proc_nr_dentry(ctl_table *table, int write, void __user *buffer,
size_t *lenp, loff_t *ppos)
{
- dentry_stat.nr_dentry = percpu_counter_sum_positive(&nr_dentry);
+ dentry_stat.nr_dentry = get_nr_dentry();
return proc_dointvec(table, write, buffer, lenp, ppos);
}
#endif
@@ -93,7 +102,7 @@ static void __d_free(struct rcu_head *head)
*/
static void d_free(struct dentry *dentry)
{
- percpu_counter_dec(&nr_dentry);
+ this_cpu_dec(nr_dentry);
if (dentry->d_op && dentry->d_op->d_release)
dentry->d_op->d_release(dentry);
@@ -981,7 +990,7 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
list_add(&dentry->d_u.d_child, &parent->d_subdirs);
spin_unlock(&dcache_lock);
- percpu_counter_inc(&nr_dentry);
+ this_cpu_inc(nr_dentry);
return dentry;
}
@@ -2418,8 +2427,6 @@ static void __init dcache_init(void)
{
int loop;
- percpu_counter_init(&nr_dentry, 0);
-
/*
* A constructor could be added for stable state like the lists,
* but it is probably not worth it because of the cache nature
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