Re: 2.6.38 PV Guest boot failure - error while pinning mfn..

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

On Sun, Mar 20, 2011 at 02:19:43PM -0700, Shriram Rajagopalan wrote:
> On Sun, Mar 20, 2011 at 2:05 PM, Shriram Rajagopalan <rshriram@cs.ubc.ca>wrote:
> 
> > On Sun, Mar 20, 2011 at 1:45 PM, Konrad Rzeszutek Wilk <
> > konrad.wilk@oracle.com> wrote:
> >
> >> On Sun, Mar 20, 2011 at 04:05:43PM -0400, Konrad Rzeszutek Wilk wrote:
> >> > On Sat, Mar 19, 2011 at 06:22:17PM -0700, Shriram Rajagopalan wrote:
> >> > > The kernel is built from konrad's tree, devel/next-2.6.39
> >> > > commit:f4ddaaf4338999227b3f724615d8aecbe88d3f04
> >>
> >> Ok. So you got Stefano's latest goodies:
> >>
> >> * devel/bootup-fixes.v3:
> >>      watchdog, SP5100: Check if firmware has set correct value in tcobase.
> >>      xen: update mask_rw_pte after kernel page tables init changes
> >>      xen: set max_pfn_mapped to the last pfn mapped
> >>      x86: Cleanup highmap after brk is concluded
> >>
> >> > >
> >> > > 64 bit PV guest, 64 bit dom0, xen 4.1.0-rc7-pre
> >>
> >> Is the 64-bit dom0 kernel == 64-bit domu kernel?
> >>
> > no. dom0 is 2.6.32.27 (from xenbits pvops tree).
> >
> >>
> >> > > I have not been able to boot a pv domU, with the above kernel.
> >> >
> >> > You might need this git commit:
> >> > 31fd38842ab07b95440f24c6180d9a2c14b35111
> >> >
> >> > tc/cmos: Check if ACPI is disabled, and if so don't attempt
> >> >
> >> > If you pull my tree, you should be able to cherrypick.
> >>
> >> Did that. No use. Still same error.
> > FYI, this throws a warning
> > linux-2.6/drivers/rtc/rtc-cmos.c:1000: warning: ‘return’ with no value, in
> > function returning non-void
> >
> >
> >>  Also do 'earlyprintk=xenboot' in your PV guest and see what it tells you
> >> (if anything).
> >>
> >> No extra messages in xen's log.
> >
> > Just for the heck of it, I copied out an .config from a pvops domU (2.6.32)
> 
> and tweaked it a bit - basically disabling backend drivers, rtc,
> hpet_emulate_rtc.
> 
> I got this in console (xm create -c)
> Started domain ubuntu-pv64 (id=5)
> (early) [    0.000000] Initializing cgroup subsys cpuset
> (early) [    0.000000] Initializing cgroup subsys cpu
> (early) [    0.000000] Linux version 2.6.38-xenu (root@athos) (gcc version
> 4.4.3 (Ubuntu 4.4.3-4ubuntu5) ) #28 SMP Sun Mar 20 14:05:47 PDT 2011
> (early) [    0.000000] Command line: root=/dev/xvda1 ro earlyprintk=xenboot
> console=hvc0 3
> (early) [    0.000000] ACPI in unprivileged domain disabled
> (early) [    0.000000] released 0 pages of unused memory
> (early) [    0.000000] Set 0 page(s) to 1-1 mapping.
> (early) [    0.000000] BIOS-provided physical RAM map:
> (early) [    0.000000]  Xen: 0000000000000000 - 00000000000a0000 (usable)
> (early) [    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)
> (early) [    0.000000]  Xen: 0000000000100000 - 000000007d800000 (usable)
> (early) [    0.000000] bootconsole [xenboot0] enabled
> (early) [    0.000000] NX (Execute Disable) protection: active
> (early) [    0.000000] DMI not present or invalid.
> (early) [    0.000000] No AGP bridge found
> (early) [    0.000000] last_pfn = 0x7d800 max_arch_pfn = 0x400000000
> (early) [    0.000000] init_memory_mapping:
> 0000000000000000-000000007d800000
> 
> The errors on xen's side are still same. MFN mapping error as stated
> earlier.

And you are using 'xm' or 'xl'? Try the either one just to make sure it is
not something silly there.