select_collect(): ignore dentries on shrink lists if they have positive refcounts

If all dentries we find have positive refcounts and some happen
to be on shrink lists, there's no point trying to steal them in the
select_collect2() phase - we won't be able to evict any of them.  Busy on
shrink lists is still busy...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/dcache.c b/fs/dcache.c
index fa12e18906b9879a848c954391990af8d2f73776..40031b806b739fa5d113d049055cf5971f79a006 100644 (file)
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1589,9 +1589,7 @@ static enum d_walk_ret select_collect(void *_data, struct dentry *dentry)
        if (data->start == dentry)
                goto out;
 
-       if (dentry->d_flags & DCACHE_SHRINK_LIST) {
-               data->found++;
-       } else if (!dentry->d_lockref.count) {
+       if (!dentry->d_lockref.count) {
                to_shrink_list(dentry, &data->dispose);
                data->found++;
        } else if (dentry->d_lockref.count < 0) {