linux-kernel - Re: [PATCH v6 09/12] Inject asynchronous page fault into a PV guest if page is swapped out.

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Message-ID: <4CAA8F36.5050608@redhat.com>
Date:	Mon, 04 Oct 2010 22:36:38 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Gleb Natapov <gleb@...hat.com>
CC:	kvm@...r.kernel.org, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, avi@...hat.com, mingo@...e.hu,
	a.p.zijlstra@...llo.nl, tglx@...utronix.de, hpa@...or.com,
	cl@...ux-foundation.org, mtosatti@...hat.com
Subject: Re: [PATCH v6 09/12] Inject asynchronous page fault into a PV guest
 if page is swapped out.

On 10/04/2010 11:56 AM, Gleb Natapov wrote:
> Send async page fault to a PV guest if it accesses swapped out memory.
> Guest will choose another task to run upon receiving the fault.
>
> Allow async page fault injection only when guest is in user mode since
> otherwise guest may be in non-sleepable context and will not be able
> to reschedule.
>
> Vcpu will be halted if guest will fault on the same page again or if
> vcpu executes kernel code.
>
> Signed-off-by: Gleb Natapov<gleb@...hat.com>

Acked-by: Rik van Riel <riel@...hat.com>

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