[dpdk-stable] [PATCH] lib/distributor: fix deadlock issue for aarch64

[Hunt, David]

On 08/10/2019 10:55, Ruifeng Wang wrote:
> Distributor and worker threads rely on data structs in cache line
> for synchronization. The shared data structs were not protected.
> This caused deadlock issue on weaker memory ordering platforms as
> aarch64.
> Fix this issue by adding memory barriers to ensure synchronization
> among cores.
>
> Bugzilla ID: 342
> Fixes: 775003ad2f96 ("distributor: add new burst-capable library")
> Cc: stable at dpdk.org
>
> Signed-off-by: Ruifeng Wang <ruifeng.wang at arm.com>
> Reviewed-by: Gavin Hu <gavin.hu at arm.com>
> ---
>   lib/librte_distributor/rte_distributor.c     | 28 ++++++++++------
>   lib/librte_distributor/rte_distributor_v20.c | 34 +++++++++++++-------
>   2 files changed, 41 insertions(+), 21 deletions(-)
>
--snip--

I tested this on my system, and saw no performance degradation. Looks 
good. Thanks.

Acked-by: David Hunt <david.hunt at intel.com>