[Qemu-devel] Re: [PATCH] qemu/virtio: make wmb compiler barrier + comments

[Paul Brook]

On Wednesday 11 November 2009, Michael S. Tsirkin wrote:
> On Wed, Nov 11, 2009 at 01:45:35PM +0000, Paul Brook wrote:
> > If you don't need real barriers, then why does the kvm code have them?
> 
> We need real barriers but AFAIK kvm does not have them :(
> IOW: virtio is currently broken with kvm, and my patch did
> not fix this. The comment that I added says as much.

So your code just makes the bug harder to reproduce? Doesn't sound like a good 
thing to me.

Paul