Hello,

I was trying to install i686 variant of F-13 to an Alix board (2D13 with
Geode LX) and got into troubles. The kernel boots fine, but when it
should start initramfs the kernel panics. Everything works well when
using complete F-12 environment and when using F-12 kernel+initramfs
with F-13 rootfs the initramfs stuff runs well, but when I try to
manually chroot into the F-13 from the dracut shell I get an "Invalid
instruction" exception. I though last change in x86 CPU support was in
F-12 (http://fedoraproject.org/wiki/Features/F12X86Support) and it
explicitly talks about Geode LX as still supported. So the question is
whether F-13 should still work on Geode LX?


Dan


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On Mon, Apr 05, 2010 at 02:48:03PM +0200, Dan Horák wrote:
> Hello,
>
> I was trying to install i686 variant of F-13 to an Alix board (2D13 with
> Geode LX) and got into troubles. The kernel boots fine, but when it
> should start initramfs the kernel panics. Everything works well when
> using complete F-12 environment and when using F-12 kernel+initramfs
> with F-13 rootfs the initramfs stuff runs well, but when I try to
> manually chroot into the F-13 from the dracut shell I get an "Invalid
> instruction" exception. I though last change in x86 CPU support was in
> F-12 (http://fedoraproject.org/wiki/Features/F12X86Support) and it
> explicitly talks about Geode LX as still supported. So the question is
> whether F-13 should still work on Geode LX?

The 2D3/2D13 has only 256 MB of RAM which is a bit tight for
installing Fedora. TBH I didn't even expect Fedora would work, so I
put Debian on my 2D3 :-(

Rich.

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Richard W.M. Jones pÃ*Å¡e v Po 05. 04. 2010 v 19:31 +0100:
> On Mon, Apr 05, 2010 at 02:48:03PM +0200, Dan Horák wrote:
> > Hello,
> >
> > I was trying to install i686 variant of F-13 to an Alix board (2D13 with
> > Geode LX) and got into troubles. The kernel boots fine, but when it
> > should start initramfs the kernel panics. Everything works well when
> > using complete F-12 environment and when using F-12 kernel+initramfs
> > with F-13 rootfs the initramfs stuff runs well, but when I try to
> > manually chroot into the F-13 from the dracut shell I get an "Invalid
> > instruction" exception. I though last change in x86 CPU support was in
> > F-12 (http://fedoraproject.org/wiki/Features/F12X86Support) and it
> > explicitly talks about Geode LX as still supported. So the question is
> > whether F-13 should still work on Geode LX?
>
> The 2D3/2D13 has only 256 MB of RAM which is a bit tight for
> installing Fedora. TBH I didn't even expect Fedora would work, so I
> put Debian on my 2D3 :-(

yes, installing Fedora with anaconda in 256MB could be a problem, but
it's sufficient for running minimalized Fedora. It will serve as a
router/firewall/vpn server on my Internet connection. Thus I prepared a
system with "yum --installroot=/mnt/compactflash install ...". I will
write a blog entry tomorrow with all the details.


Dan


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On Mon, Apr 5, 2010 at 1:48 PM, Dan Horák <dan@danny.cz> wrote:
> Hello,
>
> I was trying to install i686 variant of F-13 to an Alix board (2D13 with
> Geode LX) and got into troubles. The kernel boots fine, but when it
> should start initramfs the kernel panics. Everything works well when
> using complete F-12 environment and when using F-12 kernel+initramfs
> with F-13 rootfs the initramfs stuff runs well, but when I try to
> manually chroot into the F-13 from the dracut shell I get an "Invalid
> instruction" exception. I though last change in x86 CPU support was in
> F-12 (http://fedoraproject.org/wiki/Features/F12X86Support) and it
> explicitly talks about Geode LX as still supported. So the question is
> whether F-13 should still work on Geode LX?

That is correct, it should still work and if it has changed it hasn't
been a published change and we rule out the 1.2 million odd OLPC XO-1s
that currently run a number of different versions of Fedora. Could
someone please verify the status of this?

Peter
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On 06/02/2010 12:09 PM, Peter Robinson wrote:
> It does work in F-12, the response for the lack of support in F-13 was
> 'deal with it'. There is suppose to be a patch to emulate it in the
> kernel but apparently it won't go upstream until its a generic infra
> patch that can allow support of other emulated bits in other cpus in a
> generic way. So its possible it will come back, but I don't hold up
> hope of a quick resolution. Which leaves us in a big predicament as to
> how we're going to support the 1.5 million odd XO-1s out there moving
> forward.
>

Can you file a ticket with FESCo? Would be useful to track and resolve
this issue.

Rahul
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On 05.04.2010 14:48, Dan Horák wrote:
>
> I was trying to install i686 variant of F-13 to an Alix board (2D13 with
> Geode LX) and got into troubles. The kernel boots fine, but when it
> should start initramfs the kernel panics. Everything works well when
> using complete F-12 environment and when using F-12 kernel+initramfs
> with F-13 rootfs the initramfs stuff runs well, but when I try to
> manually chroot into the F-13 from the dracut shell I get an "Invalid
> instruction" exception. I though last change in x86 CPU support was in
> F-12 (http://fedoraproject.org/wiki/Features/F12X86Support) and it
> explicitly talks about Geode LX as still supported. So the question is
> whether F-13 should still work on Geode LX?
>

Sorry to reopen this old topic, but the conclusion is not obvious. The
F13 is out and it seems to have lost support for the Geode LX CPU
(cf.http://sharkcz.livejournal.com/5708.html), due to the use of the
NOPL instruction by GCC.

Will this CPU be supported during F13 and above or should I search for a
new distribution ?

Regards,
Glandvador

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On Tue, Jun 01, 2010 at 22:43:25 +0200,
Gland Vador <glandvador@yahoo.com> wrote:
> On 05.04.2010 14:48, Dan Horák wrote:
> >
> > I was trying to install i686 variant of F-13 to an Alix board (2D13 with
> > Geode LX) and got into troubles. The kernel boots fine, but when it
> > should start initramfs the kernel panics. Everything works well when
> > using complete F-12 environment and when using F-12 kernel+initramfs
> > with F-13 rootfs the initramfs stuff runs well, but when I try to
> > manually chroot into the F-13 from the dracut shell I get an "Invalid
> > instruction" exception. I though last change in x86 CPU support was in
> > F-12 (http://fedoraproject.org/wiki/Features/F12X86Support) and it
> > explicitly talks about Geode LX as still supported. So the question is
> > whether F-13 should still work on Geode LX?
> >
>
> Sorry to reopen this old topic, but the conclusion is not obvious. The
> F13 is out and it seems to have lost support for the Geode LX CPU
> (cf.http://sharkcz.livejournal.com/5708.html), due to the use of the
> NOPL instruction by GCC.
>
> Will this CPU be supported during F13 and above or should I search for a
> new distribution ?

I don't believe there was any intentional change in supported CPUs for F13.
If it was supposed to work in F12, I think it is supposed to work in F13.
Did you file a bug against gcc?
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On Wed, Jun 2, 2010 at 4:52 AM, Bruno Wolff III <bruno@wolff.to> wrote:
> On Tue, Jun 01, 2010 at 22:43:25 +0200,
> *Gland Vador <glandvador@yahoo.com> wrote:
>> On 05.04.2010 14:48, Dan Horák wrote:
>> >
>> > I was trying to install i686 variant of F-13 to an Alix board (2D13 with
>> > Geode LX) and got into troubles. The kernel boots fine, but when it
>> > should start initramfs the kernel panics. Everything works well when
>> > using complete F-12 environment and when using F-12 kernel+initramfs
>> > with F-13 rootfs the initramfs stuff runs well, but when I try to
>> > manually chroot into the F-13 from the dracut shell I get an "Invalid
>> > instruction" exception. I though last change in x86 CPU support was in
>> > F-12 (http://fedoraproject.org/wiki/Features/F12X86Support) and it
>> > explicitly talks about Geode LX as still supported. So the question is
>> > whether F-13 should still work on Geode LX?
>> >
>>
>> Sorry to reopen this old topic, but the conclusion is not obvious. The
>> F13 is out and it seems to have lost support for the Geode LX CPU
>> (cf.http://sharkcz.livejournal.com/5708.html), due to the use of the
>> NOPL instruction by GCC.
>>
>> Will this CPU be supported during F13 and above or should I search for a
>> new distribution ?
>
> I don't believe there was any intentional change in supported CPUs for F13.
> If it was supposed to work in F12, I think it is supposed to work in F13.
> Did you file a bug against gcc?

It does work in F-12, the response for the lack of support in F-13 was
'deal with it'. There is suppose to be a patch to emulate it in the
kernel but apparently it won't go upstream until its a generic infra
patch that can allow support of other emulated bits in other cpus in a
generic way. So its possible it will come back, but I don't hold up
hope of a quick resolution. Which leaves us in a big predicament as to
how we're going to support the 1.5 million odd XO-1s out there moving
forward.

Peter
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On Tue, Jun 1, 2010 at 7:47 PM, Rahul Sundaram <metherid@gmail.com> wrote:
> On 06/02/2010 12:09 PM, Peter Robinson wrote:
>> It does work in F-12, the response for the lack of support in F-13 was
>> 'deal with it'. There is suppose to be a patch to emulate it in the
>> kernel but apparently it won't go upstream until its a generic infra
>> patch that can allow support of other emulated bits in other cpus in a
>> generic way. So its possible it will come back, but I don't hold up
>> hope of a quick resolution. Which leaves us in a big predicament as to
>> how we're going to support the 1.5 million odd XO-1s out there moving
>> forward.
>>
>
> Can you file a ticket with FESCo? *Would be useful to track and resolve
> this issue.

I will do. I'll gather up all the bits I have an add it to the ticket.

Thanks,
Peter
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On 02.06.2010 09:19, Peter Robinson wrote:
> On Tue, Jun 1, 2010 at 7:47 PM, Rahul Sundaram wrote:
>> On 06/02/2010 12:09 PM, Peter Robinson wrote:
>>> It does work in F-12, the response for the lack of support in F-13 was
>>> 'deal with it'. There is suppose to be a patch to emulate it in the
>>> kernel but apparently it won't go upstream until its a generic infra
>>> patch that can allow support of other emulated bits in other cpus in a
>>> generic way. So its possible it will come back, but I don't hold up
>>> hope of a quick resolution. Which leaves us in a big predicament as to
>>> how we're going to support the 1.5 million odd XO-1s out there moving
>>> forward.
>>>
>>
>> Can you file a ticket with FESCo? Would be useful to track and resolve
>> this issue.
>
> I will do. I'll gather up all the bits I have an add it to the ticket.
>

Thank you Peter,

I hope a solution can be found before the obsolescence of F12. If
needed, I'm ready to help.

Regards,
Glandvador.

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