Re: [Qemu-devel] [RFC 0/7] Rework vhost memory region updates

[Stefan Hajnoczi]

On Wed, Nov 29, 2017 at 06:50:19PM +0000, Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <address@hidden>
> 
> Hi,
>   This is an experimental set that reworks the way the vhost
> code handles changes in physical address space layout that
> came from a discussion with Igor.
> 
> Instead of updating and trying to merge sections of address
> space on each add/remove callback, we wait until the commit phase
> and go through and rebuild a list by walking the Flatview of
> memory and end up producing an ordered list.
> We compare the list to the old list to trigger updates.
> 
> Note, only very lightly tested so far, I'm just trying to see if it's
> the right shape.

The cover letter doesn't mention why this change is necessary.  It would
be helpful to know :).

Stefan

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