linux-kernel - Re: [PATCH] KVM: don't sent IPI if the vcpu is not online

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Message-ID: <4C844887.9090802@cn.fujitsu.com>
Date:	Mon, 06 Sep 2010 09:48:55 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH] KVM: don't sent IPI if the vcpu is not online

On 09/05/2010 03:18 PM, Avi Kivity wrote:
>  On 09/03/2010 07:12 AM, Xiao Guangrong wrote:
>> It's no need sent IPI to the vcpu which is schedule out
>>
>>
>> @@ -86,6 +86,7 @@ struct kvm_vcpu {
>>       unsigned long requests;
>>       unsigned long guest_debug;
>>       int srcu_idx;
>> +    bool online;
> 
> Why not check for guest_mode instead?
> 

Oh, i forget it...but 'vcpu->guest_mode' is only used in x86 platform,
and make_all_cpus_request() is a common function.

So, maybe it's better use 'vcpu->online' here, and move 'guest_mode' into
'vcpu->arch' ?
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