Re: dom0/xen boot problem

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Fri, Feb 25, 2011 at 11:22:24AM -0800, Kay, Allen M wrote:
> Jeremy/Konrad,
> 
> Thanks for Stefano's help, dom0/xen boot failure on my Sandybridge desktop SDP has been isolated to the following patch that is missing in both 2.6.32 and 2.6.37 PVOPS branches.  According to PVOPS wiki 2.6.32 and 2.6.37 are suppose to be active branches.  Can you back port this patch to both 2.6.32 and 2.6.37 branches?

I believe it is already in the Greg KH 2.6.37.x bug-fix branch. But ... we don't actually
have a 2.6.37.x development branch. We do have a 2.6.38 one - wherein the
patch is present.


Under 2.6.32.x.. Jeremy, I've stuck this patch and another in
for-2.6.32/bug-fixes. Could you pull it please?

> 
> I'm surprised that I'm the only person encountering this problem.  Not being able use either printk or xen_raw_printk in xen_build_dynamic_phys_to_machine() does not help debugging either.  I was going to save max_pfn in a global variable and then print it out later in xen_build_mfn_list_list() before Stefano pointed out this patch. :-)

Oh man, what a headache.
> 
> Allen
> 
> ----- missing patch -------
> 
> commit cf04d120d9413de581437cf9a29f138ec1178f65
> Author: Stefan Bader <stefan.bader@canonical.com>
> Date:   Thu Jan 27 10:03:14 2011 -0500
> 
>     xen/p2m: Mark INVALID_P2M_ENTRY the mfn_list past max_pfn.
>     
>     In case the mfn_list does not have enough entries to fill
>     a p2m page we do not want the entries from max_pfn up to
>     the boundary to be filled with unknown values. Hence
>     set them to INVALID_P2M_ENTRY.
>     
>     Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
> 
> ----- active pvops branches from pvops wiki page -----
> 
> Current active branches are:
> 
> xen/stable-2.6.32.x - this is the long term maintained branch, tracking upstream kernel.org 2.6.32.x stable updates. This branch has Xen dom0 patches added. This is the recommended branch for most users. Changelog: http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=xen/stable-2.6.32.x .
> xen/next-2.6.32 - This is a branch for next 2.6.32 version and gets migrated to the stable branch once automatic tests have succeeded. Changelog: http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=xen/next-2.6.32 .
> xen/next-2.6.37 - this is the current development branch based on Linux 2.6.37. Changelog: http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=xen/next-2.6.37 .