linux-kernel - Re: [PATCH v6 02/12] Halt vcpu if page it tries to access is swapped out.

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Message-ID: <4CADCA1E.1080207@redhat.com>
Date:	Thu, 07 Oct 2010 09:24:46 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Gleb Natapov <gleb@...hat.com>, kvm@...r.kernel.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org, 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 02/12] Halt vcpu if page it tries to access is swapped
 out.

On 10/07/2010 05:50 AM, Avi Kivity wrote:

>> +static bool can_do_async_pf(struct kvm_vcpu *vcpu)
>> +{
>> + if (unlikely(!irqchip_in_kernel(vcpu->kvm) ||
>> + kvm_event_needs_reinjection(vcpu)))
>> + return false;
>> +
>> + return kvm_x86_ops->interrupt_allowed(vcpu);
>> +}
>
> Strictly speaking, if the cpu can handle NMIs it can take an apf?

Strictly speaking, yes.

However, it may not be able to DO anything with it, since
it won't be able to reschedule the context it's running :)

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