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Roman Konz

2007-Aug-02 10:01 UTC

[Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Hi all,

i have installed a fresh Debian Etch on a Supermicro Opteron Server
System with 8GB RAM.
Everything works fine, until I installed XEN (i have tried installing
from the Debian-Repository, from the XEN binary package and by
compiling the whole XEN distribution by hand).

If I boot the XEN Kernel, Linux shows me just 3,2GB RAM, but if I
reboot into the Debian standard Kernel, the memory is detected
correctly.

I don''t know what to try next, so I hope you can help me :-)

Thanks a lot!

Roman Konz

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Peter Peltonen

2007-Aug-02 13:38 UTC

head link

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Hi,

On 8/2/07, Roman Konz <drummermonkey@gmail.com>
wrote:> If I boot the XEN Kernel, Linux shows me just 3,2GB RAM, but if I
> reboot into the Debian standard Kernel, the memory is detected
> correctly.
>
> I don''t know what to try next, so I hope you can help me :-)
I have similiar problem on 32bit CentOS5 and 6gb of RAM: with
kernel-PAE all memory is indeed recognized, but with kernel-xen not
(which has PAE support also).

But AFAIK 64bit OS should "just" work and see all your memory. Which
debian version / xen packages do you have installed?

I will try next installing the 64bit version of CentOS5 and see if
that makes a difference in my own case.

Cheers,
Peter

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Roman Konz

2007-Aug-02 14:18 UTC

head link

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Hi Peter,

i have tried XEN 3.0.4 which is shipped with debian itself.
Then i''ve tried to install the official binary package of XEN 3.1,
and it gave the same error.
Compiling XEN 3.1&its shipped Kernel also don''t work.

I''m not sure, but I think it must be an error in the XEN Kernel.
The same version (2.6.18) compiled without XEN support works fine with
8G of memory.

Now i have tried the evaluation of XEN Enterprise - same error.
A Hardware-Failure is not possible because i have tried it on 2 (same
Hardare) Computers.
Is it possible, that the XEN-Patch does not support our Hardware?

Thanks a lot

Greets,
Roman Konz

2007/8/2, Peter Peltonen
<peter.peltonen@gmail.com>:> Hi,
>
> On 8/2/07, Roman Konz <drummermonkey@gmail.com> wrote:
> > If I boot the XEN Kernel, Linux shows me just 3,2GB RAM, but if I
> > reboot into the Debian standard Kernel, the memory is detected
> > correctly.
> >
> > I don''t know what to try next, so I hope you can help me :-)
>
> I have similiar problem on 32bit CentOS5 and 6gb of RAM: with
> kernel-PAE all memory is indeed recognized, but with kernel-xen not
> (which has PAE support also).
>
> But AFAIK 64bit OS should "just" work and see all your memory.
Which
> debian version / xen packages do you have installed?
>
> I will try next installing the 64bit version of CentOS5 and see if
> that makes a difference in my own case.
>
> Cheers,
> Peter
>
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Stephan Seitz

2007-Aug-02 16:24 UTC

head link

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Hi Roman,

We had similar problems with recent Supermicro Boards after installing
huge amounts of RAM.
The problems disappeared on all machines after we made BIOS updates.
Only issue was to find the right BIOS image, since Supermicro offered
a bunch of images labelled with the same version but with different
release dates.

Greetings

Stephan


Roman Konz schrieb:> Hi Peter,
> 
> i have tried XEN 3.0.4 which is shipped with debian itself.
> Then i''ve tried to install the official binary package of XEN 3.1,
> and it gave the same error.
> Compiling XEN 3.1&its shipped Kernel also don''t work.
> 
> I''m not sure, but I think it must be an error in the XEN Kernel.
> The same version (2.6.18) compiled without XEN support works fine with
> 8G of memory.
> 
> Now i have tried the evaluation of XEN Enterprise - same error.
> A Hardware-Failure is not possible because i have tried it on 2 (same
> Hardare) Computers.
> Is it possible, that the XEN-Patch does not support our Hardware?
> 
> Thanks a lot
> 
> Greets,
> Roman Konz
> 
> 
> 2007/8/2, Peter Peltonen <peter.peltonen@gmail.com>:
>> Hi,
>>
>> On 8/2/07, Roman Konz <drummermonkey@gmail.com> wrote:
>>> If I boot the XEN Kernel, Linux shows me just 3,2GB RAM, but if I
>>> reboot into the Debian standard Kernel, the memory is detected
>>> correctly.
>>>
>>> I don''t know what to try next, so I hope you can help me
:-)
>> I have similiar problem on 32bit CentOS5 and 6gb of RAM: with
>> kernel-PAE all memory is indeed recognized, but with kernel-xen not
>> (which has PAE support also).
>>
>> But AFAIK 64bit OS should "just" work and see all your
memory. Which
>> debian version / xen packages do you have installed?
>>
>> I will try next installing the 64bit version of CentOS5 and see if
>> that makes a difference in my own case.
>>
>> Cheers,
>> Peter
>>
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users

-- 
Stephan Seitz
Senior System Administrator

*netz-haut* e.K.
multimediale kommunikation

zweierweg 22
97074 würzburg

fon: +49 931 2876247
fax: +49 931 2876248

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registriergericht: amtsgericht würzburg, hra 5054



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Peter Peltonen

2007-Aug-02 17:16 UTC

head link

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Hi Stephen,

On 8/2/07, Stephan Seitz <s.seitz@netz-haut.de>
wrote:> We had similar problems with recent Supermicro Boards after installing
> huge amounts of RAM.
> The problems disappeared on all machines after we made BIOS updates.
> Only issue was to find the right BIOS image, since Supermicro offered
> a bunch of images labelled with the same version but with different
> release dates.
We have the reason here as I also have a Supermicro board.

My motherboard is Supermicro H8SMA-2 A64/Opteron with MD Athlon 64 X2
5200+ processor with 2 x 1GB ECC DDR-II SDRAM and 2x 2GB ECC DDR-II SDRAM.

I just installed 64bit CentOS and it did not make any change: the
system still sees only 3.2GB of RAM when booting with xen enabled
kernel (with normal kernel all 6GB is recognized).

Supermicro offers just one BIOS update to download for this board:
Revision: R 1.0a. I find this a bit odd, as when I enter the BIOS I
see:

AMIBIOS Version 08.00.14
               ID 1SMI2010

I wonder if I should try the update or not?

Peter

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Robert A. Klahn

2007-Aug-02 17:18 UTC

head link

[Xen-users] Re: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

I ran into a similar problem in Fedora 7, x86_64, 16GB RAM, only
3GB+abit detected by Xen 3.1.

Ultimately, I tracked it down to a problem in Grub. I reported it on the
Fedora Bugzilla at
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=250299

But the shorter version is this patch to Grub:

--- grub-0.97/stage2/common.c.e820      2007-07-30 11:36:19.000000000
-0800    
+++ grub-0.97/stage2/common.c           2007-07-30 11:36:55.000000000
-0800    
@@ -142,6 +142,7 @@
 init_bios_info (void)                                                   
 {                                                                       
 #ifndef STAGE1_5                                                        
-  unsigned long cont, memtmp, addr;                                     
+  unsigned long memtmp, addr;                                           
+  volatile unsigned long cont;                                          
   int drive;                                                            
 #endif
> Message: 1
> Date: Thu, 2 Aug 2007 16:18:18 +0200
> From: "Roman Konz" <drummermonkey@gmail.com>
> Subject: Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit
> 	Debian
> To: "Peter Peltonen" <peter.peltonen@gmail.com>
> Cc: xen-users@lists.xensource.com
> Message-ID:
> 	<313072780708020718k68386da4k851b2f20fe87fcd2@mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> Hi Peter,
> 
> i have tried XEN 3.0.4 which is shipped with debian itself.
> Then i''ve tried to install the official binary package of XEN 3.1,
> and it gave the same error.
> Compiling XEN 3.1&its shipped Kernel also don''t work.
> 
> I''m not sure, but I think it must be an error in the XEN Kernel.
> The same version (2.6.18) compiled without XEN support works fine with
> 8G of memory.
> 
> Now i have tried the evaluation of XEN Enterprise - same error.
> A Hardware-Failure is not possible because i have tried it on 2 (same
> Hardare) Computers.
> Is it possible, that the XEN-Patch does not support our Hardware?
> 
> Thanks a lot
> 
> Greets,
> Roman Konz
> 
> 
> 2007/8/2, Peter Peltonen <peter.peltonen@gmail.com>:
> > Hi,
> >
> > On 8/2/07, Roman Konz <drummermonkey@gmail.com> wrote:
> > > If I boot the XEN Kernel, Linux shows me just 3,2GB RAM, but if I
> > > reboot into the Debian standard Kernel, the memory is detected
> > > correctly.
> > >
> > > I don''t know what to try next, so I hope you can help me
:-)
> >
> > I have similiar problem on 32bit CentOS5 and 6gb of RAM: with
> > kernel-PAE all memory is indeed recognized, but with kernel-xen not
> > (which has PAE support also).
> >
> > But AFAIK 64bit OS should "just" work and see all your
memory. Which
> > debian version / xen packages do you have installed?
> >
> > I will try next installing the 64bit version of CentOS5 and see if
> > that makes a difference in my own case.
> >
> > Cheers,
> > Peter
> >-----------------------------------------------------------
Robert A. Klahn         robert@kint.org         AIM: rklahn

"Hope has two beautiful daughters: Anger and Courage. Anger
 at the way things are, and Courage to struggle to create 
 things as they should be." -- St. Augustine


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Roman Konz

2007-Aug-02 20:31 UTC

head link

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Hi
> What processor/motherboard do you have?
I don''t remember exactly (i''m not at work at the moment, so I
can''t
access the Server) but it is a nvidia chipset with 2 Dual Core
Opterons
> We had similar problems with recent Supermicro Boards after installing
> huge amounts of RAM.
> The problems disappeared on all machines after we made BIOS updates.
> Only issue was to find the right BIOS image, since Supermicro offered
> a bunch of images labelled with the same version but with different
> release dates.
This is the first thing i will try tomorrow!

Thanks a lot so far,
i hope i can report success tomorrow

Roman

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Stephan Seitz

2007-Aug-02 21:39 UTC

head link

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Hi Peter,
> My motherboard is Supermicro H8SMA-2 A64/Opteron with MD Athlon 64 X2
> 5200+ processor with 2 x 1GB ECC DDR-II SDRAM and 2x 2GB ECC DDR-II SDRAM.
The latest updates we made were done on PDSME+ and PDSMI Boards with
Intel chipset and Dualcore Xeon 3060. I currently don''t remember the
Opteron driven Boards.
Nevertheless, I would give it a try, since my experiences with
Supermicro in general are that 8 out of 10 needs an update right out
of the box, regardless if in AMD or Intel layout.

Worth to say that you should doublecheck the revision ;)

Greetings

Stephan




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Robert Lacroix

2007-Aug-03 23:28 UTC

head link

[Xen-users] RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

I''ve tried Robert''s patch for grub but it didn''t
solve our problem. We are
using 8GB of ram in an MSI Q965MDO-FI. Applying the latest BIOS (v3.6)
didn''t solve the problem either. Same behavior: Debian kernel
linux-image-2.6.18-4-amd64: 8GB, using Xen Hypervisor 3.1.0 with
linux-image-2.6.18-4-xen-amd64: 3.2GB. Any other ideas left?

 

/robert

 

 

----------------------------------------------------------------------------
---------------------------------------

by Robert A. Klahn Aug 02, 2007; 07:18pm

 

 

I ran into a similar problem in Fedora 7, x86_64, 16GB RAM, only

3GB+abit detected by Xen 3.1.

 

Ultimately, I tracked it down to a problem in Grub. I reported it on the

Fedora Bugzilla at

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=250299

 

But the shorter version is this patch to Grub:

 

--- grub-0.97/stage2/common.c.e820      2007-07-30 11:36:19.000000000

-0800    

+++ grub-0.97/stage2/common.c           2007-07-30 11:36:55.000000000

-0800    

@@ -142,6 +142,7 @@

 init_bios_info (void)                                                  

 {                                                                      

 #ifndef STAGE1_5                                                        

-  unsigned long cont, memtmp, addr;                                    

+  unsigned long memtmp, addr;                                          

+  volatile unsigned long cont;                                          

   int drive;                                                            

 #endif

 
> Message: 1
> Date: Thu, 2 Aug 2007 16:18:18 +0200
> From: "Roman Konz" <drummermonkey@...>
> Subject: Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit
> Debian
> To: "Peter Peltonen" <peter.peltonen@...>
> Cc: xen-users@...
> Message-ID:
> <313072780708020718k68386da4k851b2f20fe87fcd2@...>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> Hi Peter,
> 
> i have tried XEN 3.0.4 which is shipped with debian itself.
> Then i''ve tried to install the official binary package of XEN 3.1,
> and it gave the same error.
> Compiling XEN 3.1&its shipped Kernel also don''t work.
> 
> I''m not sure, but I think it must be an error in the XEN Kernel.
> The same version (2.6.18) compiled without XEN support works fine with
> 8G of memory.
> 
> Now i have tried the evaluation of XEN Enterprise - same error.
> A Hardware-Failure is not possible because i have tried it on 2 (same
> Hardare) Computers.
> Is it possible, that the XEN-Patch does not support our Hardware?
> 
> Thanks a lot
> 
> Greets,
> Roman Konz
> 
> 
> 2007/8/2, Peter Peltonen <peter.peltonen@...>:
> > Hi,
> >
> > On 8/2/07, Roman Konz <drummermonkey@...> wrote:
> > > If I boot the XEN Kernel, Linux shows me just 3,2GB RAM, but if I
> > > reboot into the Debian standard Kernel, the memory is detected
> > > correctly.
> > >
> > > I don''t know what to try next, so I hope you can help me
:-)
> >
> > I have similiar problem on 32bit CentOS5 and 6gb of RAM: with
> > kernel-PAE all memory is indeed recognized, but with kernel-xen not
> > (which has PAE support also).
> >
> > But AFAIK 64bit OS should "just" work and see all your
memory. Which
> > debian version / xen packages do you have installed?
> >
> > I will try next installing the 64bit version of CentOS5 and see if
> > that makes a difference in my own case.
> >
> > Cheers,
> > Peter
> >
-----------------------------------------------------------

Robert A. Klahn         robert@...         AIM: rklahn

 

"Hope has two beautiful daughters: Anger and Courage. Anger

 at the way things are, and Courage to struggle to create

 things as they should be." -- St. Augustine

 

 



_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

Robert Lacroix

2007-Aug-04 08:16 UTC

head link

[Xen-users] RE: RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

I''ve tried Robert''s patch for grub but it didn''t
solve our problem. We are
using 8GB of ram in an MSI Q965MDO-FI. Applying the latest BIOS (v3.6)
didn''t solve the problem either. Same behavior: Debian kernel
linux-image-2.6.18-4-amd64: 8GB, using Xen Hypervisor 3.1.0 with
linux-image-2.6.18-4-xen-amd64: 3.2GB. Any other ideas left?

 

/robert

 

From: Robert A. Klahn
Sent: Donnerstag, 2. August 2007 19:18
To: ''xen-users@lists.xensource.com''
Subject: RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

 

I ran into a similar problem in Fedora 7, x86_64, 16GB RAM, only

3GB+abit detected by Xen 3.1.

 

Ultimately, I tracked it down to a problem in Grub. I reported it on the

Fedora Bugzilla at

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=250299

 

But the shorter version is this patch to Grub:

 

--- grub-0.97/stage2/common.c.e820      2007-07-30 11:36:19.000000000

-0800    

+++ grub-0.97/stage2/common.c           2007-07-30 11:36:55.000000000

-0800    

@@ -142,6 +142,7 @@

 init_bios_info (void)                                                  

 {                                                                      

 #ifndef STAGE1_5                                                        

-  unsigned long cont, memtmp, addr;                                    

+  unsigned long memtmp, addr;                                          

+  volatile unsigned long cont;                                          

   int drive;                                                            

 #endif

 
> Message: 1
> Date: Thu, 2 Aug 2007 16:18:18 +0200
> From: "Roman Konz" <drummermonkey@...>
> Subject: Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit
> Debian
> To: "Peter Peltonen" <peter.peltonen@...>
> Cc: xen-users@...
> Message-ID:
> <313072780708020718k68386da4k851b2f20fe87fcd2@...>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> Hi Peter,
> 
> i have tried XEN 3.0.4 which is shipped with debian itself.
> Then i''ve tried to install the official binary package of XEN 3.1,
> and it gave the same error.
> Compiling XEN 3.1&its shipped Kernel also don''t work.
> 
> I''m not sure, but I think it must be an error in the XEN Kernel.
> The same version (2.6.18) compiled without XEN support works fine with
> 8G of memory.
> 
> Now i have tried the evaluation of XEN Enterprise - same error.
> A Hardware-Failure is not possible because i have tried it on 2 (same
> Hardare) Computers.
> Is it possible, that the XEN-Patch does not support our Hardware?
> 
> Thanks a lot
> 
> Greets,
> Roman Konz
> 
> 
> 2007/8/2, Peter Peltonen <peter.peltonen@...>:
> > Hi,
> >
> > On 8/2/07, Roman Konz <drummermonkey@...> wrote:
> > > If I boot the XEN Kernel, Linux shows me just 3,2GB RAM, but if I
> > > reboot into the Debian standard Kernel, the memory is detected
> > > correctly.
> > >
> > > I don''t know what to try next, so I hope you can help me
:-)
> >
> > I have similiar problem on 32bit CentOS5 and 6gb of RAM: with
> > kernel-PAE all memory is indeed recognized, but with kernel-xen not
> > (which has PAE support also).
> >
> > But AFAIK 64bit OS should "just" work and see all your
memory. Which
> > debian version / xen packages do you have installed?
> >
> > I will try next installing the 64bit version of CentOS5 and see if
> > that makes a difference in my own case.
> >
> > Cheers,
> > Peter
> >
-----------------------------------------------------------

Robert A. Klahn         robert@...         AIM: rklahn

 

"Hope has two beautiful daughters: Anger and Courage. Anger

 at the way things are, and Courage to struggle to create

 things as they should be." -- St. Augustine

 

 



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http://lists.xensource.com/xen-users

Peter Peltonen

2007-Aug-06 21:19 UTC

head link

Re: [Xen-users] RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

I have (almost) now solved my issues with Xen not resolving all RAM of
Supermicro server.

As grub patching seemed a bit too much work, I went straight ahead to
flashing the BIOS.

Everything else went just fine except one strange thing: Before the
upgrade BIOS reported 5904M of RAM. After the upgrade it reported only
5360M.

After BIOS upgrade I booted to 64bit CentOS5. To my disappointment the
system still saw only  3,2G of RAM.

But I did not give up :)

I thought that if the problem was with grub, maybe some older version
would work. So I installed 64bit CentOS 4.5 and installed Xen 3.10 to
it from the binaries Xensource provides. And this is what I can now
see on my server''s screen after issuing `xm dmesg`:

(XEN) System RAM: 5343MB (5471676kB)

So the problem was with grub I think and I probably just hurt myself
by flashing the BIOS as I lost a few hundres of megabytes of memory.
But at least we made this much progress.

Cheers,
Peter

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Robert Lacroix

2007-Aug-06 23:13 UTC

head link

RE: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

The grub patch works perfectly fine and I have the full 8191MB available
now. The problem was just that I didn''t know that patching the debian
grub
package, installing it and running update-grub isn''t enough. After
issuing

 

grub-install /dev/sda 

 

and a following reboot everything worked. Sorry for the confusion and thanks
to Shock for giving me the hint ;-)

 

/Robert



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Peter Peltonen

2007-Aug-07 20:10 UTC

head link

Re: [Xen-users] RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Replying to myself...

On 8/7/07, Peter Peltonen <peter.peltonen@gmail.com>
wrote:> Everything else went just fine except one strange thing: Before the
> upgrade BIOS reported 5904M of RAM. After the upgrade it reported only
> 5360M.
After setting "Memory Hole Remapping -> Enabled" from BIOS I can
now
see all my RAM. Whee :)

The problem now is that the CentOS4.5+Xen3.1 does not seem to be able
to boot the domUs created with CentOS5+Xen3.0. After issuing xm create
I just get a blank line and nothing else.

I suppose I still will try one more time installing CentOS5 and
patching grub, as Robert reported a success story as well.

Peter

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Xen users - Aug 2007 - Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

[Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

[Xen-users] Re: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Re: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

[Xen-users] RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

[Xen-users] RE: RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Re: [Xen-users] RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

RE: [Xen-users] Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian

Re: [Xen-users] RE: Xen-Kernel detects just 3.2GB Ram on a 64Bit Debian