From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: Biweekly VMX status report. Xen: #21438 & Xen0:
	#a3e7c7...
Date: Wed, 2 Jun 2010 10:41:17 +0100
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To: "Jiang, Yunhong" <yunhong.jiang@intel.com>, "Xu, Jiajun" <jiajun.xu@intel.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
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On 02/06/2010 10:24, "Jiang, Yunhong" <yunhong.jiang@intel.com> wrote:

> (XEN) Pagetable walk from ffff83022fe1d000:
> (XEN)  L4[0x106] = 00000000cfc8d027 5555555555555555
> (XEN)  L3[0x008] = 00000000cfef9063 5555555555555555
> (XEN)  L2[0x17f] = 000000022ff2a063 5555555555555555
> (XEN)  L1[0x01d] = 000000022fe1d262 5555555555555555
> 
> I really can't imagine how this can happen considering the vmx_alloc_vmcs() is
> so straight-forward. My test machine is really magic.

Not at all. The free-memory pool was getting spiked with guarded (mapped
not-present) pages. The later unlucky allocator is the one that then
crashes.

I've just fixed this as xen-unstable:21504. The bug was a silly typo.

 Thanks,
 Keir