Re: [Qemu-devel] [RFC PATCH RDMA support v5: 03/12] comprehensive protocol documentation

[Michael S. Tsirkin]

On Thu, Apr 11, 2013 at 05:47:53PM +0200, Paolo Bonzini wrote:
> Il 11/04/2013 17:46, Michael S. Tsirkin ha scritto:
> > > Ok, let's keep it simple.  The only two things we need are:
> > > 
> > > 1) remove the patch to disable is_dup_page
> > > 
> > > 2) rename the transport to "x-rdma" (just in migration.c)
> > > 
> > > Both things together let us keep it safe for a release or two.  Let's
> > > merge this thing.
> > 
> > I would drop the chunk based thing too.  Besides being slow, it turns
> > out that it pins all memory anyway. So no memory overcommit.
> 
> It doesn't pin zero pages.  Those are never transmitted (it's a recent
> change).  So pages that are ballooned at the beginning of migration, and
> remain ballooned throughout, will never be pinned.
> 
> Paolo

Of course Michael says it's slow unless you disable zero page detection,
and then I'm guessing it does?

-- 
MST