Re: [dpdk-dev] [PATCH] net/mlx5: introduce mlx5 hash list

[Stephen Hemminger <stephen@networkplumber.org>]

On Tue,  5 Nov 2019 17:28:00 +0200
Bing Zhao <bingz@mellanox.com> wrote:

> Introduce simple hash list to the mlx5 utilities. User can define
> its own data structure containing the mlx5_hlist_entry and create
> the hash list table via the creation interface. Then the entry will
> be inserted into the table and linked to the corresponding list
> head. User should guarantee there is no collision of the key and
> provide a callback function to handle all the remaining entries in
> the table when destroying the hash list. User should define a proper
> number of the list heads in the table in order to get a better
> performance. The LSB of the 'key' is used to calculate the index of
> the head in the list heads array.
> This implementation is not multi-threads safe right now.
> 
> Signed-off-by: Bing Zhao <bingz@mellanox.com>

There is already a plethora of hash routines in DPDK, why introduce
a chained hash list like Linux kernel?