[Qemu-devel] Re: [PATCH] RFC: use logging count for individual regions

[Avi Kivity]

On 07/28/2009 09:50 AM, Jan Kiszka wrote:
>    
> > Unlike the qemu dirty byte-map, the kvm dirty log can only service one
> > user.  As we have multiple users (vga and migration), we need some way
> > to fix this impedance mismatch.  I think refcounts are the easiest.
> >      
>
> This case is already handled upstream. If we had more users, we would
> need refcounts.
>    

If we turn off logging on migration failure, then we'd introduce a bug 
in vga logging, no?

--
Do not meddle in the internals of kernels, for they are subtle and quick to 
panic.