[dpdk-stable] [PATCH v2 1/2] vdpa/mlx5: workaround FW first completion in start
Maxime Coquelin
maxime.coquelin at redhat.com
Thu Oct 21 11:40:05 CEST 2021
On 10/15/21 17:05, Xueming Li wrote:
> After a vDPA application restart, qemu restores VQ with used and
> available index, new incoming packet triggers virtio driver to
> handle buffers. Under heavy traffic, no available buffer for
> firmware to receive new packets, no Rx interrupts generated,
> driver is stuck on endless interrupt waiting.
>
> As a firmware workaround, this patch sends a notification after
> VQ setup to ask driver handling buffers and filling new buffers.
>
> Fixes: bff735011078 ("vdpa/mlx5: prepare virtio queues")
> Cc: stable at dpdk.org
>
> Signed-off-by: Xueming Li <xuemingl at nvidia.com>
> Reviewed-by: Matan Azrad <matan at nvidia.com>
> ---
> drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>
Thanks,
Maxime
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