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Re: [Xen-devel] How to build non-PAE dom0 kernel with Xen-3.2-testing (P

To: xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] How to build non-PAE dom0 kernel with Xen-3.2-testing (PAE-disabled)?
From: Abhinav Srivastava <abhinavs_iitkgp@xxxxxxxxxxx>
Date: Tue, 23 Sep 2008 21:28:00 +0530 (IST)
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--- On Tue, 23/9/08, Keir Fraser <keir.fraser@xxxxxxxxxxxxx> wrote:

> From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
> Subject: Re: [Xen-devel] How to build non-PAE dom0 kernel with 
> Xen-3.2-testing (PAE-disabled)?
> To: abhinavs_iitkgp@xxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx
> Date: Tuesday, 23 September, 2008, 12:13 PM
> On 23/9/08 02:38, "Abhinav Srivastava"
> <abhinavs_iitkgp@xxxxxxxxxxx> 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.


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