Re: [Qemu-devel] [PATCH 00/16] Multifd v4

[Daniel P. Berrange]

On Tue, Mar 14, 2017 at 10:21:43AM +0000, Dr. David Alan Gilbert wrote:
> * Juan Quintela (address@hidden) wrote:
> > Hi
> > 
> > This is the 4th version of multifd. Changes:
> > - XBZRLE don't need to be checked for
> > - Documentation and defaults are consistent
> > - split socketArgs
> > - use iovec instead of creating something similar.
> > - We use now the exported size of target page (another HACK removal)
> > - created qio_chanel_{wirtev,readv}_all functions.  the _full() name
> >   was already taken.
> >   What they do is the same that the without _all() function, but if it
> >   returns due to blocking it redo the call.
> > - it is checkpatch.pl clean now.
> > 
> > Please comment, Juan.
> 
> High level things,
>   a) I think you probably need to do some bandwidth measurements to show
>     that multifd is managing to have some benefit - it would be good
>     for the cover letter.

Presumably this would be a building block to solving the latency problems
with post-copy, by reserving one channel for use transferring out of band
pages required by target host page faults.

Regards,
Daniel
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