X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=fs%2Fkernfs%2Fdir.c;fp=fs%2Fkernfs%2Fdir.c;h=fffca9517321c88ee1e0128b864b257c56e2350d;hb=499611ed451508a42d1d7d1faff10177827755d5;hp=f131fc23ffc4c18f03a9764973fa998bf0e5f79e;hpb=8f4fc071b1926d0b20336e2b3f8ab85c94c734c5;p=firefly-linux-kernel-4.4.55.git

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;