1 files changed, 8 insertions, 1 deletions

diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index f131fc23ffc4..fffca9517321 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -518,7 +518,14 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root,
         if (!kn)
                 goto err_out1;
 
-        ret = ida_simple_get(&root->ino_ida, 1, 0, GFP_KERNEL);
+        /*
+         * If the ino of the sysfs entry created for a kmem cache gets
+         * allocated from an ida layer, which is accounted to the memcg that
+         * owns the cache, the memcg will get pinned forever. So do not account
+         * ino ida allocations.
+         */
+        ret = ida_simple_get(&root->ino_ida, 1, 0,
+                             GFP_KERNEL | __GFP_NOACCOUNT);
         if (ret < 0)
                 goto err_out2;
         kn->ino = ret;