From: Bernhard Kohl <Bernhard.Kohl@nsn.com>
To: kvm@vger.kernel.org
Subject: Re: Problems with kvm-73 on PAE host
Date: Mon, 8 Sep 2008 09:07:32 +0000 (UTC) [thread overview]
Message-ID: <loom.20080908T085305-19@post.gmane.org> (raw)
In-Reply-To: 48C38E15.10508@qumranet.com
Avi Kivity <avi <at> qumranet.com> writes:
>
> Bernhard Kohl wrote:
> > Bernhard Kohl <Bernhard.Kohl <at> nsn.com> writes:
> >
> >
> >> Hi,
> >>
> >> I'm trying to run kvm-73 on a Linux PAE host. I'm using Fedora 8 on the
> >>
> > host,
> >
> >> installed kernel-PAE and kernel-PAE-devel (2.6.25.14-69.fc8.i686), built
and
> >> installed KVM:
> >>
> >> make distclean
> >> ./configure
> >> make
> >> make install
> >>
> >>
>
> Did you remember to reload the modules? maybe you are using some stale
> modules.
Yes of course. Sorry, I forgot this in my description above. I'm doing that
usually in a little script:
...
modprobe -vr kvm-intel
make install
modprobe -v kvm-intel
> >> Immediately after starting any VM the following error occurs. Did I miss
> >> anything? No problems with the non PAE kernels.
> >>
> >> kvm_run: failed entry, reason 7
> >> kvm_run returned -8
> >>
> >
> > Hi again,
> >
> > some more infos about this topic:
> > As I could find out this is an VM-instruction error (VM entry with invalid
> > control field(s)). Is this a bug in KVM when running on a PAE kernel? Or
are
> > there special configuration options necessary for building KVM for a PAE
> > kernel.
> > There is no output in dmesg.
> >
>
> How much memory does the host have?
It has currently 8 GB. The host Linux sees all this memory. We plan to expand
this to 16 GB and run 4 guests with a legacy 32-bit OS. Is it possible that
these guest see 3 GB or is there still a 2 GB limit for 32-bit guests on 32-
bit hosts?
I searched a lot about this topic in this mailing list, but I'm not quite sure.
Unfortunately we currently need to use several hosts with CPUs that don't
support 64-bit. So I got the idea to use the PAE Linux on these hosts.
prev parent reply other threads:[~2008-09-08 9:07 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-02 11:15 Problems with kvm-73 on PAE host Bernhard Kohl
2008-09-04 14:26 ` Bernhard Kohl
2008-09-07 8:17 ` Avi Kivity
2008-09-08 9:07 ` Bernhard Kohl [this message]
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