RE: [Xen-devel] Unable to bring up x86_64 UP DomU on processor #32

["Kamble, Nitin A" <nitin.a.kamble@xxxxxxxxx>]

A crude way to achieve it can be:

xc.domain_pincpu(self.domid, 0, (0 - (0x80000000 >> (31 - cpu))))


It gives this warning while starting xend. 
/usr/lib/python/xen/xend/XendDomainInfo.py:1093: FutureWarning: hex/oct
constants > sys.maxint will return positive values in Python 2.4 and up
  xc.domain_pincpu(self.domid, 0, (0 - (0x80000000 >> (31 - cpu))))


But it is harmless, and achives the purpose. From the warning seems like
python 2.4 onwards should not have this issue. This code is running on
python version 2.3.4-11.


[root@lvt3 ~]# xm create cpu=0 -n
Using config file "/etc/xen/xmdefconfig".
(vm
    (name ExampleVMXDomain)
    (memory 128)
    (ssidref 0)
    (cpu 0)
    (image
        (vmx
            (kernel /usr/lib/xen/boot/vmxloader)
            (vcpus 1)
            (device_model /usr/lib/xen/bin/qemu-dm)
            (vcpus 1)
            (boot c)
            (vnc 1)
            (vncviewer 1)
        )
    )
    (device
        (vbd (uname file:/var/images/min-el3-i386.img) (dev ioemu:hda)
(mode w))
    )
    (device (vif (mac aa:00:00:2e:97:73)))
)
[root@lvt3 ~]# xm create cpu=31 -n
Using config file "/etc/xen/xmdefconfig".
(vm
    (name ExampleVMXDomain)
    (memory 128)
    (ssidref 0)
    (cpu 31)
    (image
        (vmx
            (kernel /usr/lib/xen/boot/vmxloader)
            (vcpus 1)
            (device_model /usr/lib/xen/bin/qemu-dm)
            (vcpus 1)
            (boot c)
            (vnc 1)
            (vncviewer 1)
        )
    )
    (device
        (vbd (uname file:/var/images/min-el3-i386.img) (dev ioemu:hda)
(mode w))
    )
    (device (vif (mac aa:00:00:6b:f3:ec)))
)

Thanks & Regards,
Nitin
------------------------------------------------------------------------
-----------
Open Source Technology Center, Intel Corp
>-----Original Message-----
>From: Puthiyaparambil, Aravindh
>[mailto:aravindh.puthiyaparambil@xxxxxxxxxx]
>Sent: Saturday, October 22, 2005 12:39 PM
>To: xen-devel
>Cc: Kamble, Nitin A
>Subject: RE: [Xen-devel] Unable to bring up x86_64 UP DomU on processor
#32
>
>The reason why this is happening is that on line 1093 in
>XendDomainInfo.py, "1" is being treated as an int. My python skills are
>weak. How can I cast it as a long or unsigned long? I tried using
long()
>and "0x1L". Both don't seem to be working.
>
>XendDomainInfo.py: 1093     xc.domain_pincpu(self.domid, 0, 1 << cpu)
>
>Thanks,
>Aravindh
>
>> -----Original Message-----
>> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
>> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Puthiyaparambil, Aravindh
>> Sent: Friday, October 21, 2005 5:49 PM
>> To: Kamble, Nitin A; xen-devel
>> Subject: RE: [Xen-devel] Unable to bring up x86_64 UP DomU on
>processor
>> #32
>>
>> Nitin,
>>
>> Thanks for the lead. This is what /var/log/xend-debug.log says:
>>
>> OverflowError: signed integer is greater than maximum
>> mainInfo.create(config)
>>   File
>>
>"/root/xen/xen-unstable.hg/dist/install/usr/lib64/python/xen/xend/XendD
o
>> mainInfo.py", line 147, in create
>>     vm.initDomain()
>>   File
>>
>"/root/xen/xen-unstable.hg/dist/install/usr/lib64/python/xen/xend/XendD
o
>> mainInfo.py", line 1093, in initDomain
>>     xc.domain_pincpu(self.domid, 0, 1 << cpu)
>> OverflowError: signed integer is greater than maximum
>> cpus          = self.vm.getVCpuCount())
>> error: (0, 'Error')
>> Failed allocation for dom 19: 893952 pages order 0 addr_bits 0
>>
>> Aravindh
>>
>> > -----Original Message-----
>> > From: Kamble, Nitin A [mailto:nitin.a.kamble@xxxxxxxxx]
>> > Sent: Friday, October 21, 2005 5:38 PM
>> > To: Puthiyaparambil, Aravindh; xen-devel
>> > Subject: RE: [Xen-devel] Unable to bring up x86_64 UP DomU on
>> processor
>> > #32
>> >
>> > That's Good to know. Then this should be easy to fix. Probably the
>> > python code (xm, xend) has some issue.
>> >   You can look at /var/log/xen* files to see what is the reason of
>the
>> > error.
>> >
>> > Thanks & Regards,
>> > Nitin
>> >
>>
>-----------------------------------------------------------------------
-
>> > -----------
>> > Open Source Technology Center, Intel Corp
>> >
>> > >-----Original Message-----
>> > >From: Puthiyaparambil, Aravindh
>> > >[mailto:aravindh.puthiyaparambil@xxxxxxxxxx]
>> > >Sent: Friday, October 21, 2005 2:35 PM
>> > >To: Kamble, Nitin A; xen-devel
>> > >Subject: RE: [Xen-devel] Unable to bring up x86_64 UP DomU on
>> processor
>> > #32
>> > >
>> > >Nitin,
>> > >
>> > >When I don't specify "cpu=n", the domain does come up on CPU #32.
>> > >
>> > >Name                              ID  VCPU  CPU  State  Time(s)
>CPU
>> > Map
>> > >Domain-0                           0     0    0   r--      80.1
>> > >0xffffffffffffffff
>> > >vm1                                1     0   31   r--       7.6
>> > >0xffffffffffffffff
>> > >
>> > >
>> > >But shouldn't I be able to specify "cpu=31"?
>> > >
>> > >Thanks,
>> > >Aravindh
>> > >
>> > >> -----Original Message-----
>> > >> From: Kamble, Nitin A [mailto:nitin.a.kamble@xxxxxxxxx]
>> > >> Sent: Friday, October 21, 2005 5:16 PM
>> > >> To: Puthiyaparambil, Aravindh; xen-devel
>> > >> Subject: RE: [Xen-devel] Unable to bring up x86_64 UP DomU on
>> > >processor
>> > >> #32
>> > >>
>> > >> Aravindh,
>> > >>    By default Domains are assigned highest least loaded cpu. So
>> domU
>> > >> should get the CPU 31 as a default if you don't specify cpu=n
>> option.
>> > >>
>> > >>   What do you see if you don't specify the "cpu=n"?
>> > >>
>> > >> Thanks & Regards,
>> > >> Nitin
>> > >>
>> >
>>
>>----------------------------------------------------------------------
-
>> > -
>> > >> -----------
>> > >> Open Source Technology Center, Intel Corp
>> > >>
>> > >> >-----Original Message-----
>> > >> >From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
>> > >> >bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Puthiyaparambil,
>> Aravindh
>> > >> >Sent: Friday, October 21, 2005 2:11 PM
>> > >> >To: xen-devel
>> > >> >Subject: [Xen-devel] Unable to bring up x86_64 UP DomU on
>> processor
>> > >#32
>> > >> >
>> > >> >I am running x86_64 Xen on an ES7000 with 32 logical
processors.
>I
>> > am
>> > >> >trying to force a DomU to come up on CPU #32 by specifying
>> "cpu=31"
>> > >in
>> > >> >the DomU configuration file. "xm" gives me the following error
>> > >message:
>> > >> >
>> > >> >"Error: Error creating domain: signed integer is greater than
>> > >maximum"
>> > >> >
>> > >> >I am able to do "cpu=30" successfully.
>> > >> >
>> > >> >Is this a bug? Should I be opening up a bug report?
>> > >> >
>> > >> >BTW, this does NOT happen on x86_32 PAE.
>> > >> >
>> > >> >Aravindh
>> > >> >
>> > >> >_______________________________________________
>> > >> >Xen-devel mailing list
>> > >> >Xen-devel@xxxxxxxxxxxxxxxxxxx
>> > >> >http://lists.xensource.com/xen-devel
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxxxxxxxx
>> http://lists.xensource.com/xen-devel

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