From: Maxime Coquelin <maxime.coquelin@redhat.com>
To: Yajun Wu <yajunw@nvidia.com>,
matan@nvidia.com, Viacheslav Ovsiienko <viacheslavo@nvidia.com>,
Li Zhang <lizh@nvidia.com>
Cc: dev@dpdk.org, thomas@monjalon.net, rasland@nvidia.com,
roniba@nvidia.com, stable@dpdk.org
Subject: Re: [PATCH] vdpa/mlx5: fix unregister kick handler order
Date: Thu, 12 Oct 2023 15:50:32 +0200 [thread overview]
Message-ID: <a72d01a0-d6cc-a3ce-d439-79f93519f0f2@redhat.com> (raw)
In-Reply-To: <20230808113221.227319-1-yajunw@nvidia.com>
On 8/8/23 13:32, Yajun Wu wrote:
> The mlx5_vdpa_virtq_kick_handler function may still be running and waiting
> on virtq->virtq_lock while mlx5_vdpa_cqe_event_unset function is trying to
> re-initialize the virtq->virtq_lock.
>
> This causes mlx5_vdpa_virtq_kick_handler thread can't be wake up and can't
> be unregister. Following print may loop forever when calling
> rte_vhost_driver_unregister(socket_path):
>
> mlx5_vdpa: Try again to unregister fd 154 of virtq 11 interrupt
> mlx5_vdpa: Try again to unregister fd 154 of virtq 11 interrupt
> ...
>
> The fix is to move mlx5_vdpa_virtq_unregister_intr_handle before
> mlx5_vdpa_cqe_event_unset.
>
> Fixes: 057f7d2084 ("vdpa/mlx5: optimize datapath-control synchronization")
> Cc: stable@dpdk.org
>
> Signed-off-by: Yajun Wu <yajunw@nvidia.com>
> Acked-by: Matan Azrad <matan@nvidia.com>
> ---
> drivers/vdpa/mlx5/mlx5_vdpa.c | 1 +
> drivers/vdpa/mlx5/mlx5_vdpa_cthread.c | 1 -
> 2 files changed, 1 insertion(+), 1 deletion(-)
Applied to nex-virtio/for-next-net.
Thanks,
Maxime
prev parent reply other threads:[~2023-10-12 13:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-08 11:32 Yajun Wu
2023-10-12 13:44 ` Maxime Coquelin
2023-10-12 13:50 ` Maxime Coquelin [this message]
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