Re: [BUG] Xen vm kernel crash in get_free_entries.

[Astarta <astarta@rat.ru>]

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On 10/16/2013 06:17 PM, Pasi Kärkkäinen wrote:
> On Wed, Oct 16, 2013 at 02:29:07PM +0100, David Vrabel wrote:
>> On 16/10/13 07:28, Astarta wrote:
>>> Hello,
>>>
>>> This is a some kind of a follow up to the
>>> http://lists.xen.org/archives/html/xen-devel/2013-09/msg03109.html (
>>> Linux 3.11.1 HVM guest kernel crash when started with xl
>>> (get_free_entries)).
>>>
>>> Looks like we've here the similar issue.
>>>
>>> Xen VM with 3.8.13 kernel crashes in get_free_entries (kernel BUG at
>>> drivers/xen/grant-table.c:1181!), i.e in:
>>> BUG_ON(grefs_per_grant_frame == 0);. 3.11.5 kernel behaves in exactly
>>> the same way.
>>>
>>> Whole kernel log is attached. It does not contain  any "Grant tables
>>> using version" message.
>>>
>>> Seems that gnttab_request_version() has was never executed, so
>>> grefs_per_grant_frame was never set.
>>>
>>> Could you please advice on this issue?
>> I think you're missing the platform pci device required for PVHVM.
>> What's your VM's xl.cfg?
>>
> Yes, exactly, I had "xen_platform_pci=0" in my VM's xl.cfg,
> and I assume Astarta has aswell.
>
> That is because I wanted to test *without* PVHVM, and that is a valid configuration imho..
> (and works OK with xm/xend).
>
> -- Pasi

Thanks for the suggestion, but there is no xl.cfg in /etc/xen/ (we're 
using Citrix XenServer Host 6.2.0-70446c
  on rhel 6.2), so there is no where to edit xen_platform_pci option.

I've attached output from xe vm-list params=all for one of the problem 
vm. Hope its also ok.

Also 3.6 kernel works well with that configuration. I can provide it's 
boot log if needed.

Please suggest.

--
Marina

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uuid ( RO)                          : 64c9830e-6397-0bb0-81ea-de8cad8794a3
                    name-label ( RW): Windows Server 2012 (64-bit)
              name-description ( RW): 
                  user-version ( RW): 1
                 is-a-template ( RW): false
                 is-a-snapshot ( RO): false
                   snapshot-of ( RO): <not in database>
                     snapshots ( RO): 
                 snapshot-time ( RO): 19700101T00:00:00Z
                 snapshot-info ( RO): 
                        parent ( RO): <not in database>
                      children ( RO): 
             is-control-domain ( RO): false
                   power-state ( RO): halted
                 memory-actual ( RO): 1073709056
                 memory-target ( RO): <expensive field>
               memory-overhead ( RO): 11534336
             memory-static-max ( RW): 1073741824
            memory-dynamic-max ( RW): 1073741824
            memory-dynamic-min ( RW): 1073741824
             memory-static-min ( RW): 1073741824
              suspend-VDI-uuid ( RW): <not in database>
               suspend-SR-uuid ( RW): 1b40f2b4-3284-8dbf-a0fd-c93390c7c046
                  VCPUs-params (MRW): 
                     VCPUs-max ( RW): 1
              VCPUs-at-startup ( RW): 1
        actions-after-shutdown ( RW): Destroy
          actions-after-reboot ( RW): Restart
           actions-after-crash ( RW): Restart
                 console-uuids (SRO): 
                      platform (MRW): timeoffset: -25200; nx: true; acpi: 1; apic: true; pae: true; vga: std; videoram: 8; viridian: true; device_id: 0002
            allowed-operations (SRO): changing_dynamic_range; changing_shadow_memory; changing_static_range; make_into_template; destroy; export; start_on; start; clone; copy; snapshot
            current-operations (SRO): 
            blocked-operations (MRW): 
           allowed-VBD-devices (SRO): <expensive field>
           allowed-VIF-devices (SRO): <expensive field>
                possible-hosts ( RO): <expensive field>
               HVM-boot-policy ( RW): BIOS order
               HVM-boot-params (MRW): order: dc
         HVM-shadow-multiplier ( RW): 1.000
                     PV-kernel ( RW): 
                    PV-ramdisk ( RW): 
                       PV-args ( RW): 
                PV-legacy-args ( RW): 
                 PV-bootloader ( RW): 
            PV-bootloader-args ( RW): 
           last-boot-CPU-flags ( RO): vendor: GenuineIntel; features: 0000e3bd-bfebfbff-00000001-20100800
              last-boot-record ( RO): <expensive field>
                   resident-on ( RO): <not in database>
                      affinity ( RW): 5067bedc-cc4f-4631-9270-4ab9208acad6
                  other-config (MRW): vgpu_pci: ; base_template_name: Windows Server 2012 (64-bit); mac_seed: e17b7cd1-3a70-9b84-5c56-83f3e17c10ed; install-methods: cdrom
                        dom-id ( RO): -1
               recommendations ( RO): <restrictions><restriction field="memory-static-max" max="137438953472" /><restriction field="vcpus-max" max="16" /><restriction property="number-of-vbds" max="7" /><restriction property="number-of-vifs" max="7" /></restrictions>
                 xenstore-data (MRW): vm-data: 
    ha-always-run ( RW) [DEPRECATED]: false
           ha-restart-priority ( RW): 
                         blobs ( RO): 
                    start-time ( RO): 19700101T00:00:00Z
                  install-time ( RO): 20131009T13:30:57Z
                  VCPUs-number ( RO): 0
             VCPUs-utilisation (MRO): <expensive field>
                    os-version (MRO): <not in database>
            PV-drivers-version (MRO): <not in database>
         PV-drivers-up-to-date ( RO): <not in database>
                        memory (MRO): <not in database>
                         disks (MRO): <not in database>
                      networks (MRO): <not in database>
                         other (MRO): <not in database>
                          live ( RO): <not in database>
    guest-metrics-last-updated ( RO): <not in database>
      cooperative ( RO) [DEPRECATED]: <expensive field>
                          tags (SRW): 
                     appliance ( RW): <not in database>
                   start-delay ( RW): 0
                shutdown-delay ( RW): 0
                         order ( RW): 0
                       version ( RO): 0
                 generation-id ( RO): 836232628191772189:5239282750367167867



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