[dpdk-dev] [PATCH] net/mlx5: fix Memory Region lookup

[Nélio Laranjeiro]

On Thu, Jan 18, 2018 at 11:52:55PM -0800, Yongseok Koh wrote:
> This patch reverts:
> 	commit 3a6f2eb8c5c5 ("net/mlx5: fix Memory Region registration")
> 
> Although granularity of chunks in a mempool is a cacheline, addresses are
> extended to align to page boundary for performance reason in device when
> registering a MR (Memory Region). This could make some regions overlap,
> then can cause Tx completion error due to incorrect LKEY search. If the
> error occurs, the Tx queue will get stuck. It is because buffer address is
> compared against aligned addresses for Memory Region. Saving original
> addresses of mempool for comparison doesn't create any overlap.
> 
> Fixes: b0b093845793 ("net/mlx5: use buffer address for LKEY search")
> Fixes: 3a6f2eb8c5c5 ("net/mlx5: fix Memory Region registration")
> Cc: stable at dpdk.org
> 
> Reported-by: Xueming Li <xuemingl at mellanox.com>
> Signed-off-by: Xueming Li <xuemingl at mellanox.com>
> Signed-off-by: Yongseok Koh <yskoh at mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>

-- 
Nélio Laranjeiro
6WIND