linux-kernel - Re: [PATCH v2 5/5] KVM: MMU: retry #PF for softmmu

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Message-ID: <4CDFBE00.2000802@redhat.com>
Date:	Sun, 14 Nov 2010 12:46:24 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	Gleb Natapov <gleb@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH v2 5/5] KVM: MMU: retry #PF for softmmu

On 11/12/2010 08:50 AM, Xiao Guangrong wrote:
> Retry #PF for softmmu only when the current vcpu has the same
> root shadow page as the time when #PF occurs. it means they
> have same paging environment
>

The process could have been killed and replaced by another using the 
same cr3.  Or we may be running a guest that uses the same cr3 for all 
processes.  Or another thread may have mmap()ed something else over the 
same address.  So I think this is incorrect.

Meanwhile, I applied patches 1-4.

-- 
error compiling committee.c: too many arguments to function

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