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

[Shahaf Shuler]

Friday, January 19, 2018 10:37 AM, 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>

Applied to next-net-mlx, thanks. 

> 
> --
> Nélio Laranjeiro
> 6WIND