linux-kernel - Re: kvm causing memory corruption? now 2.6.26-rc8

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Message-Id: <1216148242.25942.6.camel@nimitz>
Date:	Tue, 15 Jul 2008 11:57:22 -0700
From:	Dave Hansen <dave@...ux.vnet.ibm.com>
To:	Avi Kivity <avi@...ranet.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	kvm-devel <kvm@...r.kernel.org>,
	"Anthony N. Liguori [imap]" <aliguori@...ibm.com>
Subject: Re: kvm causing memory corruption?  now 2.6.26-rc8

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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