Re: [kvm-devel] [PATCH 1/5] Support more than 3.5GB with virtio (v3)

[Avi K. <av...@qu...>]

Anthony Liguori wrote:
> We're pretty sloppy in virtio right now about phys_ram_base assumptions.  This
> patch is an incremental step between what we have today and a full blown DMA
> API.  I backported the DMA API but the performance impact was not acceptable
> to me. There's only a slight performance impact with this particular patch.
>
> Since we're no longer assuming guest physical memory is contiguous, we need
> a more complex way to validate the memory regions than just checking if it's
> within ram_size.
>   

Applied patches 1-2.  Since patch 4 is under contention on qemu-devel, 
and 3 and 5 depend on it, I'd like to get the can_receive semantic 
change accepted first.


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