From mboxrd@z Thu Jan  1 00:00:00 1970
From: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Subject: Re: [RFC PATCH v2 7/7] KVM: KVM: don't break vcpu 'halt' state due
 to apfs
Date: Tue, 02 Nov 2010 17:30:16 +0800
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Cc: Avi Kivity <avi@redhat.com>, Marcelo Tosatti <mtosatti@redhat.com>,
	LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
To: Gleb Natapov <gleb@redhat.com>
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On 11/02/2010 05:14 PM, Gleb Natapov wrote:

> If irqchip is in userspace apf is disabled (see mmu.c:can_do_async_pf()).
> The reason for this is that when irqchip_in_kernel(v->kvm) cpu sleeps in
> userspace during halt, so all event that can cause it to be unhalted
> should be generated in userspace too. This is also the reason you can't have
> pit in kernel and irqchip in userpsace.
> 

Oh, thank you very much for answering so many questions, and your patch is
looks good for me! ;-)