From: Avi Kivity <avi@redhat.com>
To: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
Subject: Re: [PATCH 1/2] KVM: MMU: don't make direct sp read-only if !map_writable
Date: Mon, 13 Dec 2010 12:32:13 +0200 [thread overview]
Message-ID: <4D05F62D.9040308@redhat.com> (raw)
In-Reply-To: <4D05F5F6.3070909@cn.fujitsu.com>
On 12/13/2010 12:31 PM, Xiao Guangrong wrote:
> Currently, if the page is not allowed to write, then it can drop
> ACC_WRITE_MASK in pte_access, and the direct sp's access is:
> gw->pt_access& gw->pte_access
> so, it also removes the write access in the direct sp.
>
> There is a problem: if the access of those pages which map thought the same
> mapping in guest is different in host, it causes host switch direct sp very
> frequently.
I just sent a patch to fix this in a different way, please review it.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2010-12-13 10:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-13 10:31 [PATCH 1/2] KVM: MMU: don't make direct sp read-only if !map_writable Xiao Guangrong
2010-12-13 10:32 ` Avi Kivity [this message]
2010-12-14 1:53 ` Xiao Guangrong
2010-12-14 8:56 ` Avi Kivity
2010-12-13 10:32 ` [PATCH 2/2] KVM: MMU: audit: allow audit more guests at the same time Xiao Guangrong
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