Re: [PATCH v3 01/10] crypto: virtio: Add spinlock protection with virtqueue notification

[Jason Wang]

On Tue, Dec 9, 2025 at 10:23 AM Bibo Mao <maobibo@xxxxxxxxxxx> wrote:
>
> When VM boots with one virtio-crypto PCI device and builtin backend,
> run openssl benchmark command with multiple processes, such as
>   openssl speed -evp aes-128-cbc -engine afalg  -seconds 10 -multi 32
>
> openssl processes will hangup and there is error reported like this:
>  virtio_crypto virtio0: dataq.0:id 3 is not a head!
>
> It seems that the data virtqueue need protection when it is handled
> for virtio done notification. If the spinlock protection is added
> in virtcrypto_done_task(), openssl benchmark with multiple processes
> works well.
>
> Fixes: fed93fb62e05 ("crypto: virtio - Handle dataq logic with tasklet")
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Bibo Mao <maobibo@xxxxxxxxxxx>

Acked-by: Jason Wang <jasowang@xxxxxxxxxx>

Thanks