Xen devel - Sep 2008 - How to build non-PAE dom0 kernel with Xen-3.2-testing (PAE-disabled)?

Hi there,

I am trying build Xen-3.2-testing version (directly fetched from mercury) on my
Intel Core 2 Quad desktop. The desktop has got 4GB of RAM and currently running
Fedora 8. I built Xen with PAE disabled (modified the Config.mk file) and
rebooted my machine, but it gave me kernel panic error. The message that I saw
was "Mismatch occurred.
Xen 32-bit lsb, Dom0 32-bit PAE, lsb"

I tried different ways to disable PAE support from the dom0 but none of them
worked. I built the same xen version on my laptop (Intel Core 2 duo with 2GB of
RAM) 2 months back and I got PAE disabled thing working.

This time I saw a new parameter "CONFIG_X86_PAE=Y" in the .config file
inside the build-linux-2.6.18-xen_x86_32 directory. If I try to make
"CONFIG_X86_PAE=N" in the .config file, it does not work as this file
gets generated everytime. When I checked the
build-linux-2.6.18-xen_x86_3/.config file of my laptop installation, I did not
see such configuration parameters.

Is it introduced recently or depending upon the machine it gets added
on-the-fly? In any case, how to build dom0 kernel with non-PAE support. I really
want to build all non-pae kernels for my research work perspective.

Please let me know someway/settings so that I could build non-pae dom0 kernel. 

Any help would be highly appreciated.

Thanks,
Abhinav


      Unlimited freedom, unlimited storage. Get it now, on
http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/

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

On 23/9/08 02:38, "Abhinav Srivastava"
<abhinavs_iitkgp@yahoo.co.in> wrote:
> I am trying build Xen-3.2-testing version (directly fetched from mercury)
on
> my Intel Core 2 Quad desktop. The desktop has got 4GB of RAM and currently
> running Fedora 8. I built Xen with PAE disabled (modified the Config.mk
file)
> and rebooted my machine, but it gave me kernel panic error. The message
that I
> saw was "Mismatch occurred.
> Xen 32-bit lsb, Dom0 32-bit PAE, lsb"
> 
> I tried different ways to disable PAE support from the dom0 but none of
them
> worked. I built the same xen version on my laptop (Intel Core 2 duo with
2GB
> of RAM) 2 months back and I got PAE disabled thing working.
> 
> This time I saw a new parameter "CONFIG_X86_PAE=Y" in the .config
file inside
> the build-linux-2.6.18-xen_x86_32 directory. If I try to make
> "CONFIG_X86_PAE=N" in the .config file, it does not work as this
file gets
> generated everytime. When I checked the
build-linux-2.6.18-xen_x86_3/.config
> file of my laptop installation, I did not see such configuration
parameters.
> 
> Is it introduced recently or depending upon the machine it gets added
> on-the-fly? In any case, how to build dom0 kernel with non-PAE support. I
> really want to build all non-pae kernels for my research work perspective.
> 
> Please let me know someway/settings so that I could build non-pae dom0
kernel.
Run ''make menuconfig'' in the kernel build directory, and then
look for
Highmem Support or similar. Should be set to 4GB rather than 64GB.

 -- Keir



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

--- On Tue, 23/9/08, Keir Fraser <keir.fraser@eu.citrix.com> wrote:
> From: Keir Fraser <keir.fraser@eu.citrix.com>
> Subject: Re: [Xen-devel] How to build non-PAE dom0 kernel with
Xen-3.2-testing (PAE-disabled)?
> To: abhinavs_iitkgp@yahoo.co.in, xen-devel@lists.xensource.com
> Date: Tuesday, 23 September, 2008, 12:13 PM
> On 23/9/08 02:38, "Abhinav Srivastava"
> <abhinavs_iitkgp@yahoo.co.in> wrote:
> 
> > I am trying build Xen-3.2-testing version (directly
> fetched from mercury) on
> > my Intel Core 2 Quad desktop. The desktop has got 4GB
> of RAM and currently
> > running Fedora 8. I built Xen with PAE disabled
> (modified the Config.mk file)
> > and rebooted my machine, but it gave me kernel panic
> error. The message that I
> > saw was "Mismatch occurred.
> > Xen 32-bit lsb, Dom0 32-bit PAE, lsb"
> > 
> > I tried different ways to disable PAE support from the
> dom0 but none of them
> > worked. I built the same xen version on my laptop
> (Intel Core 2 duo with 2GB
> > of RAM) 2 months back and I got PAE disabled thing
> working.
> > 
> > This time I saw a new parameter
> "CONFIG_X86_PAE=Y" in the .config file inside
> > the build-linux-2.6.18-xen_x86_32 directory. If I try
> to make
> > "CONFIG_X86_PAE=N" in the .config file, it
> does not work as this file gets
> > generated everytime. When I checked the
> build-linux-2.6.18-xen_x86_3/.config
> > file of my laptop installation, I did not see such
> configuration parameters.
> > 
> > Is it introduced recently or depending upon the
> machine it gets added
> > on-the-fly? In any case, how to build dom0 kernel with
> non-PAE support. I
> > really want to build all non-pae kernels for my
> research work perspective.
> > 
> > Please let me know someway/settings so that I could
> build non-pae dom0 kernel.
> 
> Run ''make menuconfig'' in the kernel build
> directory, and then look for
> Highmem Support or similar. Should be set to 4GB rather
> than 64GB.
> 
>  -- Keir

Hi Keir,

Thanks for the reply. I did the "make menuconfig" and found that High
Memory Support is already set to 4GB. Please let me know some other way if I
could do it. I am also attaching my
"build-linux-2.6.18-xen_x86_3/.config" file herewith.

Thanks for the help.

Regards,
Abhinav


      Connect with friends all over the world. Get Yahoo! India Messenger at
http://in.messenger.yahoo.com/?wm=n/

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

On 23/9/08 16:58, "Abhinav Srivastava"
<abhinavs_iitkgp@yahoo.co.in> wrote:
> Hi Keir,
> 
> Thanks for the reply. I did the "make menuconfig" and found that
High Memory
> Support is already set to 4GB. Please let me know some other way if I could
do
> it. I am also attaching my "build-linux-2.6.18-xen_x86_3/.config"
file
> herewith.
Ah, actually we removed non-PAE support from Xen 3.2. So you have to build a
PAE hypervisor and kernel. If you want non-PAE support, you have to use Xen
3.1.

 -- Keir



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

--- On Tue, 23/9/08, Keir Fraser <keir.fraser@eu.citrix.com> wrote:
> From: Keir Fraser <keir.fraser@eu.citrix.com>
> Subject: Re: [Xen-devel] How to build non-PAE dom0 kernel with
Xen-3.2-testing (PAE-disabled)?
> To: "Abhinav Srivastava" <abhinavs_iitkgp@yahoo.co.in>,
xen-devel@lists.xensource.com
> Date: Tuesday, 23 September, 2008, 9:36 PM
> On 23/9/08 16:58, "Abhinav Srivastava"
> <abhinavs_iitkgp@yahoo.co.in> wrote:
> 
> > Hi Keir,
> > 
> > Thanks for the reply. I did the "make
> menuconfig" and found that High Memory
> > Support is already set to 4GB. Please let me know some
> other way if I could do
> > it. I am also attaching my
> "build-linux-2.6.18-xen_x86_3/.config" file
> > herewith.
> 
> Ah, actually we removed non-PAE support from Xen 3.2. So
> you have to build a
> PAE hypervisor and kernel. If you want non-PAE support, you
> have to use Xen
> 3.1.
> 
>  -- Keir
Ohh no. Did it happen recently? I knew that Xen-3.3 did not have non-PAE
support. But, I did not know about Xen 3.2. I took Xen3.2 testing version kernel
in july from mercury and could built non-PAE hypervisor and kernel. Is it
someway I can get that build from mercury or it got changed backwardly?

Thanks for the clarification.

-Abhinav


      Unlimited freedom, unlimited storage. Get it now, on
http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/

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

On 23/9/08 17:17, "Abhinav Srivastava"
<abhinavs_iitkgp@yahoo.co.in> wrote:
>> Ah, actually we removed non-PAE support from Xen 3.2. So
>> you have to build a
>> PAE hypervisor and kernel. If you want non-PAE support, you
>> have to use Xen
>> 3.1.
>> 
>>  -- Keir
> 
> Ohh no. Did it happen recently? I knew that Xen-3.3 did not have non-PAE
> support. But, I did not know about Xen 3.2. I took Xen3.2 testing version
> kernel in july from mercury and could built non-PAE hypervisor and kernel.
Is
> it someway I can get that build from mercury or it got changed backwardly?
> 
> Thanks for the clarification.
Oh sorry, you''re quite right. All versions of Xen 3.2 do support
non-PAE.
However, the current tip of the linux-2.6.18-xen.hg repository does not.
What you should do within that repository is ''hg update
xen-3.2.0'': this
will revert your repository to a version which is old enough to support
building as non-PAE. Another thing which might work instead, and let you
keep other more recent changes and fixes, is ''hg export 616 | patch
-Rp1''.

 -- Keir



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

--- On Tue, 23/9/08, Keir Fraser <keir.fraser@eu.citrix.com> wrote:
> From: Keir Fraser <keir.fraser@eu.citrix.com>
> Subject: Re: [Xen-devel] How to build non-PAE dom0 kernel with
Xen-3.2-testing (PAE-disabled)?
> To: abhinavs_iitkgp@yahoo.co.in, xen-devel@lists.xensource.com
> Date: Tuesday, 23 September, 2008, 10:08 PM
> On 23/9/08 17:17, "Abhinav Srivastava"
> <abhinavs_iitkgp@yahoo.co.in> wrote:
> 
> >> Ah, actually we removed non-PAE support from Xen
> 3.2. So
> >> you have to build a
> >> PAE hypervisor and kernel. If you want non-PAE
> support, you
> >> have to use Xen
> >> 3.1.
> >> 
> >>  -- Keir
> > 
> > Ohh no. Did it happen recently? I knew that Xen-3.3
> did not have non-PAE
> > support. But, I did not know about Xen 3.2. I took
> Xen3.2 testing version
> > kernel in july from mercury and could built non-PAE
> hypervisor and kernel. Is
> > it someway I can get that build from mercury or it got
> changed backwardly?
> > 
> > Thanks for the clarification.
> 
> Oh sorry, you''re quite right. All versions of Xen 3.2
> do support non-PAE.
> However, the current tip of the linux-2.6.18-xen.hg
> repository does not.
> What you should do within that repository is ''hg update
> xen-3.2.0'': this
> will revert your repository to a version which is old
> enough to support
> building as non-PAE. Another thing which might work
> instead, and let you
> keep other more recent changes and fixes, is ''hg export
> 616 | patch -Rp1''.
> 
>  -- Keir
Awesome. But, I tried running the ''hg update xen-3.2.0'' within
the xen-3.2-testing.hg repository directory and it gave me this msg:
 
"abort: unknown revision xen-3.2.0".

The other command did not work too as it asked for the name of files that need
to be patched.

Is "hg update" command correct? or I have to specify some other
revision number. Please let me know.

I really appreciate you help.

Thanks,
Abhinav


      Add more friends to your messenger and enjoy! Go to
http://in.messenger.yahoo.com/invite/

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

On 23/9/08 18:00, "Abhinav Srivastava"
<abhinavs_iitkgp@yahoo.co.in> wrote:
> Awesome. But, I tried running the ''hg update xen-3.2.0''
within the
> xen-3.2-testing.hg repository directory and it gave me this msg:
>  
> "abort: unknown revision xen-3.2.0".
> 
> The other command did not work too as it asked for the name of files that
need
> to be patched.
> 
> Is "hg update" command correct? or I have to specify some other
revision
> number. Please let me know.
> 
> I really appreciate you help.
You have to do this within the linux-2.6.18-xen.hg repository. This will
either be inside your xen-unstable.hg directory, or adjacent to it.

 -- Keir



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