Re: [PATCH 2/6] lib/rhashtable: guarantee initial hashtable allocation

[Herbert Xu]

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 <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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