linux-kernel - Re: [PATCH v3 15/15] KVM: MMU: replace kvm_zap_all with kvm_mmu_invalid_all

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Message-ID: <20130418000812.GF31059@amt.cnet>
Date:	Wed, 17 Apr 2013 21:08:12 -0300
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
Cc:	gleb@...hat.com, avi.kivity@...il.com,
	linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v3 15/15] KVM: MMU: replace kvm_zap_all with
 kvm_mmu_invalid_all_pages

On Tue, Apr 16, 2013 at 02:32:53PM +0800, Xiao Guangrong wrote:
> Use kvm_mmu_invalid_all_pages in kvm_arch_flush_shadow_all and
> rename kvm_zap_all to kvm_free_all which is used to free all
> memmory used by kvm mmu when vm is being destroyed, at this time,
> no vcpu exists and mmu-notify has been unregistered, so we can
> free the shadow pages out of mmu-lock

Since there is no contention for mmu-lock its also not a problem to 
grab the lock right?

Automated verification of locking/srcu might complain.


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