From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH  -v2] Monitor command: pfa2hva, translate guest
 physical address to host virtual address
Date: Wed, 10 Nov 2010 18:44:18 +0100
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Cc: Andi Kleen <andi@firstfloor.org>,
	Huang Ying <ying.huang@intel.com>,
	Anthony Liguori <aliguori@linux.vnet.ibm.com>,
	Marcelo Tosatti <mtosatti@redhat.com>,
	Anthony Liguori <aliguori@us.ibm.com>,
	"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	Dean Nelson <dnelson@redhat.com>,
	Luiz Capitulino <lcapitulino@redhat.com>
To: Avi Kivity <avi@redhat.com>
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> Doing it in userspace in easier, since we can replace the vma for
> that section (and avoid mixed 4k/2M pages in hugetlbfs).

You can't do that today, there's no way currently to access the non corrupted
portion of the 2MB page. Once it's poisoned it's all gone.

-Andi
-- 
ak@linux.intel.com -- Speaking for myself only.