Re: [Xen-devel] 2.6.38 PV Guest boot failure - error while pinning mfn..

[Shriram Rajagopalan <rshriram@xxxxxxxxx>]

On Sun, Mar 20, 2011 at 2:05 PM, Shriram Rajagopalan <rshriram@xxxxxxxxx> wrote:

On Sun, Mar 20, 2011 at 1:45 PM, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> 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.
xenctx also shows same output (error coming from pin_pagetable_pfn)

shriram

shriram

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