On Thu, May 24, 2018 at 02:11:31PM -0700, Davidlohr Bueso wrote:

+	/*
+	 * This is api initialization and thus we need to guarantee the
+	 * initial rhashtable allocation. Upon failure, retry with a
+	 * smallest possible size, otherwise we exhaust our options with
+	 * __GFP_NOFAIL.
+	 */
 	tbl = bucket_table_alloc(ht, size, GFP_KERNEL);
-	if (tbl == NULL)
-		return -ENOMEM;
+	if (unlikely(tbl == NULL)) {
+		size = HASH_MIN_SIZE;

You should also take min_size into account.  Yes I know the current
code ignores it unless you also set nelem_hint.  But that's just a
bug.

Cheers,
-- 
Email: Herbert Xu [off-list ref]
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