linux-kernel - Re: [PATCH v2 5/7] KVM: handle more completed apfs if possible

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Date:	Mon, 01 Nov 2010 17:34:50 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Gleb Natapov <gleb@...hat.com>
CC:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH v2 5/7] KVM: handle more completed apfs if possible

On 11/01/2010 05:24 PM, Gleb Natapov wrote:

>> -		put_page(work->page);
>> -	kmem_cache_free(async_pf_cache, work);
>> +		list_del(&work->queue);
>> +		vcpu->async_pf.queued--;
>> +		if (work->page)
>> +			put_page(work->page);
>> +		kmem_cache_free(async_pf_cache, work);
>> +	} while (ret && !list_empty_careful(&vcpu->async_pf.done));
>>  }
>>  
> No need to change kvm_arch_async_page_present() to return anything. You
> can do while loop like this:
> 
> while (!list_empty_careful(&vcpu->async_pf.done) &&
>        kvm_arch_can_inject_async_page_present(vcpu)) {
> }
> 
> If kvm_arch_async_page_present() call injects exception
> kvm_arch_can_inject_async_page_present() will return false on next
> iteration.

Yeah, it's a better way, i'll fix it, thanks Gleb!
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