On 04/03/2013 10:51 AM, Sha Zhengju wrote:
> +static void
> +shrink_dcache_list(
> + struct list_head *dispose)
> +{
> + struct dentry *dentry;
> +
> + rcu_read_lock();
> + list_for_each_entry_rcu(dentry, dispose, d_lru) {
> + spin_lock(&dentry->d_lock);
> + dentry->d_flags |= DCACHE_SHRINK_LIST;
> + this_cpu_dec(nr_dentry_unused);
>
>
> Why here dec nr_dentry_unused again? Has it been decreased in the
> following shrink_dcache_sb()?
You analysis seems to be correct, and the decrement in shrink_dcache_sb
seems not to be needed.
Dave, have comments on this ?
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