Subject: Re: kvm causing memory corruption?  now 2.6.26-rc8
From: Dave Hansen <dave@linux.vnet.ibm.com>
To: Avi Kivity <avi@qumranet.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
       kvm-devel <kvm@vger.kernel.org>,
       "Anthony N. Liguori [imap]" <aliguori@us.ibm.com>
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Date: Tue, 15 Jul 2008 11:57:22 -0700
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So, just a continuation of what we were talking about before...

I just had a bug triggered on my system because I'm running sparsemem
(it was in show_mem()).  I wonder if sparsemem is contributing to the
bug.  Does kvm ever do any arithmetic that you can think of with 'struct
page's?

To summarize my config: 
* 4GB of RAM
* hole from 3-4GB (so ram ranges from 0-5GB)
* PAE enabled
* SPARSEMEM=y

http://sr71.net/~dave/linux/config-2.6.26-rc8-00089-ge1441b9

I'm compiling a kernel right now to try without sparsemem.

-- Dave

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