RE: [Xen-devel] only one CPU is detected when dom0 boots up

["Yu, Ping Y" <ping.y.yu@xxxxxxxxx>]

Harper,

Thanks a lot. It works! But the question remains that why change set 10033 
could bring up multiple CPUs without hotplug. 
I notice that there is no change in build configuration since 9980. 

Ping

>-----Original Message-----
>From: Ryan Harper [mailto:ryanh@xxxxxxxxxx]
>Sent: 2006年5月25日 10:44
>To: Yu, Ping Y
>Cc: Zheng, Jeff; xen-devel@xxxxxxxxxxxxxxxxxxx
>Subject: Re: [Xen-devel] only one CPU is detected when dom0 boots up
>
>* Yu, Ping Y <ping.y.yu@xxxxxxxxx> [2006-05-25 11:59]:
>> Harper,
>>
>> You are right! The default build configuration linux-defconfig_xen0_x86_64/
>>  linux-defconfig_xen0_x86_32 is UP, and we have manually changed the default
>> configure to make it SMP. We noticed that "uname -a" shows the dom0's kernel
>is
>>  SMP, but the problem is that only one CPU is found when dom0 boots up.
>> With the same change, we know at least change set 10033 is OK to boot with
>> multiple CPUs.
>
>Make sure CONFIG_HOTPLUG_CPU is also enabled.  After having both
>CONFIG_SMP and CONFIG_HOTPLUG_CPU, try:
>
>xm vcpu-set 0 2
>
>replacing 2 with however many cpu's you think dom0 should have.
>
>--
>Ryan Harper
>Software Engineer; Linux Technology Center
>IBM Corp., Austin, Tx
>(512) 838-9253   T/L: 678-9253
>ryanh@xxxxxxxxxx

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