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From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Matan Azrad <matan@nvidia.com>
Cc: dev@dpdk.org, stable@dpdk.org, Xueming Li <xuemingl@nvidia.com>
Subject: Re: [PATCH] vdpa/mlx5: workaround queue stop with traffic
Date: Wed, 26 Jan 2022 14:20:48 +0100	[thread overview]
Message-ID: <302ccd65-57ac-5b68-2238-8edbb46d882d@redhat.com> (raw)
In-Reply-To: <20211122131235.3270961-1-matan@nvidia.com>



On 11/22/21 14:12, Matan Azrad wrote:
> When the event thread polls traffic and a virtq is stopping, the FW loses
> synchronization in the virtq indexes.
> 
> It causes LM failure on synchronization between the HOST indexes to
> the GUEST indexes.
> 
> Unset the event thread before the queue stop in the LM process.
> 
> Fixes: 31b9c29c86af ("vdpa/mlx5: support close and config operations")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Matan Azrad <matan@nvidia.com>
> Acked-by: Xueming Li <xuemingl@nvidia.com>
> ---
>   drivers/vdpa/mlx5/mlx5_vdpa.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/vdpa/mlx5/mlx5_vdpa.c b/drivers/vdpa/mlx5/mlx5_vdpa.c
> index b9e84dd9bf..8dfaba791d 100644
> --- a/drivers/vdpa/mlx5/mlx5_vdpa.c
> +++ b/drivers/vdpa/mlx5/mlx5_vdpa.c
> @@ -250,10 +250,10 @@ mlx5_vdpa_dev_close(int vid)
>   		DRV_LOG(ERR, "Invalid vDPA device: %s.", vdev->device->name);
>   		return -1;
>   	}
> -	if (priv->configured)
> -		ret |= mlx5_vdpa_lm_log(priv);
>   	mlx5_vdpa_err_event_unset(priv);
>   	mlx5_vdpa_cqe_event_unset(priv);
> +	if (priv->configured)
> +		ret |= mlx5_vdpa_lm_log(priv);
>   	mlx5_vdpa_steer_unset(priv);
>   	mlx5_vdpa_virtqs_release(priv);
>   	mlx5_vdpa_event_qp_global_release(priv);

Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

Thanks,
Maxime


  reply	other threads:[~2022-01-26 13:20 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-22 13:12 Matan Azrad
2022-01-26 13:20 ` Maxime Coquelin [this message]
2022-01-27  5:10 ` Xia, Chenbo

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