linux-kernel - Re: [PATCH 09/15] KVM: MMU: split kvm_mmu_free

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Message-ID: <4DF479C5.3010002@redhat.com>
Date:	Sun, 12 Jun 2011 11:33:09 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: Re: [PATCH 09/15] KVM: MMU: split kvm_mmu_free_page

On 06/10/2011 06:50 AM, Xiao Guangrong wrote:
> >>  +static void kvm_mmu_free_unlock_parts(struct kvm_mmu_page *sp)
> >>  +{
> >>  +    list_del(&sp->link);
> >>  +    free_page((unsigned long)sp->spt);
> >>        kmem_cache_free(mmu_page_header_cache, sp);
> >>    }
> >
> >  The list_del() must be run under a lock, no? it can access kvm->arch.active_mmu_pages.
> >
>
> In prepare path, we have moved the sp from active_mmu_pages to invlaid_list.

It still needs to be accessed under a lock, no matter which list is used.

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

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