RE: [Xen-devel][PATCH] don't split the whole large page while live migration with EPT

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

> and we'll end up retransmitting superpages where only a handful of 4kB
> sub-pages are actually dirtied.

Hmmm... how about enhancing live migration to handle
deltas of (2MB) pages?

If any academics are lurking about, this might make a fine research
project with good publication potential.

> -----Original Message-----
> From: Keir Fraser [mailto:keir.fraser@xxxxxxxxxxxxx]
> Sent: Thursday, April 16, 2009 9:16 AM
> To: Tim Deegan; Xin, Xiaohui
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel][PATCH] don't split the whole large page while
> live migration with EPT
> 
> 
> On 16/04/2009 13:51, "Tim Deegan" <Tim.Deegan@xxxxxxxxxx> wrote:
> 
> > At 13:47 +0100 on 16 Apr (1239889668), Xin, Xiaohui wrote:
> >> We haven't measure the performance yet.
> > 
> > But you're planning to? :)
> 
> This would be definitely be a prerequisite for taking this patch. Our
> suspicion is that 2MB pages will be too coarse grained for 
> many workloads,
> and we'll end up retransmitting superpages where only a handful of 4kB
> sub-pages are actually dirtied.
> 
>  -- Keir
> 
> 
> 
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