Re: [PATCH rdma-next v1 1/7] RDMA/mlx5: Merge similar flows of allocating MR from the cache

[Jason Gunthorpe]

On Thu, Dec 30, 2021 at 01:23:18PM +0200, Leon Romanovsky wrote:

>  	if (list_empty(&ent->head)) {
> +		if (ent->limit) {
> +			queue_adjust_cache_locked(ent);
> +			ent->miss++;
> +		}

I don't this this addition of ent->limit makes any sense.

The only case it triggers is the two ODP callers and they should
definately increment miss.

queue_adjust_cache_locked() is an effective NOP if limit is zero as
available_mrs should be zero too.

Jason