linux-kernel - Re: [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm.

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Date:	Fri, 20 Jun 2014 17:39:03 -0300
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Gleb Natapov <gleb@...nel.org>
Cc:	Tang Chen <tangchen@...fujitsu.com>, pbonzini@...hat.com,
	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	mgorman@...e.de, yinghai@...nel.org,
	isimatu.yasuaki@...fujitsu.com, guz.fnst@...fujitsu.com,
	laijs@...fujitsu.com, kvm@...r.kernel.org, linux-mm@...ck.org,
	x86@...nel.org, linux-kernel@...r.kernel.org,
	Avi Kivity <avi.kivity@...il.com>
Subject: Re: [RFC PATCH 1/1] Move two pinned pages to non-movable node in kvm.

On Fri, Jun 20, 2014 at 05:31:46PM -0300, Marcelo Tosatti wrote:
> > IIRC your shadow page pinning patch series support flushing of ptes
> > by mmu notifier by forcing MMU reload and, as a result, faulting in of
> > pinned pages during next entry.  Your patch series does not pin pages
> > by elevating their page count.
> 
> No but PEBS series does and its required to stop swap-out
> of the page.

Well actually no because of mmu notifiers.

Tang, can you implement mmu notifiers for the other breaker of 
mem hotplug ?
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