From: Lai Jiangshan <laijs@cn.fujitsu.com>
To: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>, kvm@vger.kernel.org
Subject: Re: [RFC PATCH 2/2] kvm, x86: use ro page and don't copy shared page
Date: Thu, 10 Jun 2010 10:47:07 +0800 [thread overview]
Message-ID: <4C10522B.8000503@cn.fujitsu.com> (raw)
In-Reply-To: <4C0F5EAB.3030401@redhat.com>
Avi Kivity wrote:
> Wierd. For what gfn/pfns does this trigger?
>
It is ZERO_PAGE which also has Reserved bit, not mmio page.
The pte is set write-protected, I still don't know why it cause the system
hangup.
set_spte() {
if (tdp_enabled)
spte |= kvm_x86_ops->get_mt_mask(vcpu, gfn,
kvm_is_mmio_pfn(pfn));
/* guest can write to the page because of this statement? */
}
next prev parent reply other threads:[~2010-06-10 2:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 7:53 [RFC PATCH 2/2] kvm, x86: use ro page and don't copy shared page Lai Jiangshan
2010-06-09 9:28 ` Avi Kivity
2010-06-10 2:47 ` Lai Jiangshan [this message]
2010-06-10 11:19 ` Lai Jiangshan
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