Re: [Qemu-devel] [PATCH v9 42/56] Page request: Consume pages off the post-copy queue

[Juan Quintela]

"Dr. David Alan Gilbert (git)" <address@hidden> wrote:
> From: "Dr. David Alan Gilbert" <address@hidden>
>
> When transmitting RAM pages, consume pages that have been queued by
> MIG_RPCOMM_REQPAGE commands and send them ahead of normal page scanning.
>
> Note:
>   a) After a queued page the linear walk carries on from after the
> unqueued page; there is a reasonable chance that the destination
> was about to ask for other closeby pages anyway.
>
>   b) We have to be careful of any assumptions that the page walking
> code makes, in particular it does some short cuts on its first linear
> walk that break as soon as we do a queued page.
>
>   c) We have to be careful to not break up host-page size chunks, since
> this makes it harder to place the pages on the destination.
>
> Signed-off-by: Dr. David Alan Gilbert <address@hidden>

Reviewed-by: Juan Quintela <address@hidden>