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Re: [PATCH v10 00/11] Add VIRTIO sound card


From: Michael S. Tsirkin
Subject: Re: [PATCH v10 00/11] Add VIRTIO sound card
Date: Tue, 3 Oct 2023 13:10:54 -0400

On Tue, Oct 03, 2023 at 07:09:14PM +0300, Manos Pitsidianakis wrote:
> On Tue, 03 Oct 2023 17:10, "Michael S. Tsirkin" <mst@redhat.com> wrote:
> > I hope you are also fixing the linux driver to fix this in a robust
> > way, yes?
> 
> Hello Michael,
> 
> You can find pertinent discussion on the virtio-comment list here:
> 
> https://lists.oasis-open.org/archives/virtio-comment/202309/threads.html#00175
> 
> Fixing it is on our radar but it may prove non-trivial if it requires
> changing how the virtio-snd driver interacts with the kernel alsa API.

That is worrying. If spec can not be implemented spec has to change.

> Meanwhile AFAIK the qemu device conforms to the virtio spec in this case
> both with the previous version behavior and the current one. The change was
> made to compensate for the linux driver's behavior, not because it was
> previously incorrect.
> 
> Manos

It's hardly robust though, right? I.e. I think it's broken if there's
bounce buffering.

-- 
MST




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