Re: [Xen-devel] VM save/restore

[Junjie Wei <junjie.wei@xxxxxxxxxx>]

On 08/18/2012 03:34 AM, Keir Fraser wrote:
> > > 1) 32-bit guests can be configured with VCPUs > 32 and started,
> > >      but the guest can only make use of 32 of them.
> HVM guest? I don't know why this is. You will have to investigate some more
> what has happened to the rest of your VCPUs! I think it should definitely
> work. Cc Jan in case he has any thoughts.
It looks like that for 32-bit guests, the VCPU -> CPU mapping only works 
for the first 32 VCPUs. It can be reliably reproduced.
Thanks,
Junjie


[root@ovs087 HVM_X86]# rpm -qa | grep xen
xenpvboot-0.1-8.el5
xen-tools-4.1.2-39
xen-devel-4.1.2-39
xen-4.1.2-39

[root@ovs087 HVM_X86]# uname -a
Linux ovs087 2.6.39-200.30.1.el5uek #1 SMP Thu Jul 12 21:47:09 EDT 2012 
x86_64 x86_64 x86_64 GNU/Linux
[root@ovs087 HVM_X86]# cat vm.cfg | grep vcpus
vcpus = 36

[root@ovs087 HVM_X86]# xm list 65
Name                                        ID   Mem VCPUs      State 
Time(s)
OVM_OL5U7_X86_PVHVM_10GB                    65  2048    32     r----- 
  33.3
[root@ovs087 HVM_X86]# xm vcpu-list 65
Name                                ID  VCPU   CPU State   Time(s) CPU 
Affinity
OVM_OL5U7_X86_PVHVM_10GB            65     0     4   -b-      10.7 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     1     0   -b-       1.8 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     2     4   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     3     2   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     4     7   -b-       1.1 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     5     5   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     6     0   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     7     3   r--      10.6 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     8     4   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65     9     7   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    10     7   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    11     2   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    12     6   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    13     4   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    14     7   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    15     5   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    16     0   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    17     6   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    18     4   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    19     5   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    20     7   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    21     0   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    22     5   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    23     4   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    24     4   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    25     0   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    26     2   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    27     6   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    28     4   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    29     7   -b-       0.9 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    30     2   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    31     0   -b-       1.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    32     -   --p       0.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    33     -   --p       0.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    34     -   --p       0.0 any cpu
OVM_OL5U7_X86_PVHVM_10GB            65    35     -   --p       0.0 any cpu

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