From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: xenpaging crashes xen in is_iomem_page()
Date: Mon, 26 Jul 2010 16:08:56 +0200
Message-ID: <20100726140856.GA8399@aepfle.de>
References: <20100726115837.GA5643@aepfle.de>
	<AANLkTimCNX9Cnr8cOpvOw=oDgWObNvXYbXP6=9ZxpCDc@mail.gmail.com>
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To: Patrick Colp <pjcolp@cs.ubc.ca>
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On Mon, Jul 26, Patrick Colp wrote:

> I've not seen this error before. Does your computer have EPT support?

You are right, its a slightly dated system. x86info shows:

...
CPU #4
EFamily: 0 EModel: 0 Family: 15 Model: 4 Stepping: 1
CPU Model: Pentium 4 (Prescott) [E0]
Processor name string: Intel(R) Xeon(TM) CPU 3.60GHz
...

I need to move to another host, all of my systems lack EPT support.


Is there a portable way to check for the EPT flag in xenpaging?


> What's the patch at the end? Is that a fix or a recent change that you
> think might be causing the problem?

Its just naive debug output.


Olaf