Re: [Qemu-devel] Re: Question about KVM and PC speaker

[Avi Kivity]

Jan Kiszka wrote:
> Avi Kivity wrote:
>   
> > Jan Kiszka wrote:
> >     
> > > Huh, it is! Then the problem is a KVM-only thing: The kernel part hooks
> > > onto those resources but doesn't communicate changes to this user space
> > > backend.
> > >   
> > >       
> > In this case, the -no-kvm-pit option should help.
> >     
>
> Probably fine in many cases (where the PIT is no longer used anyway),
> just a bit unintuitive for users.
>   

Yes, it's only a workaround.

> I wonder why KVM moved port 0x61 handling into kernel space at all. By
> leaving it in pcspk hands and extending the latter to sync with the
> in-kernel PIT on sample generation, this speaker regression (of
> kvm-userspace) should have been avoidable.
>   

I'd rather not have partial components in the kernel.  This case is 
particularly icky though.

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