Re: 2.6.27rc1 cannot boot more than 8CPUs

Li Zefan
2008-08-06T05:00:20Z

Max Krasnyansky wrote:
> Jeff Chua wrote:
>> On Wed, Aug 6, 2008 at 11:54 AM, Max Krasnyansky <maxk@qualcomm.com>
>> wrote:
>>
>>> Are you running 32-bit kernel ?
>>
>> Yes. But, does it matter?
>
> It used to. 64-bit kernel used to handle maxcpus option as documented in
> the Documentation/cpu-hotplug.txt and 32-bit one was broken.
> I just looked at the latest code and realized that both are now broken.
> They ignore cpu id > maxcpus instead of not-booting them.
>

Yes. I have an x86_64 box with 4 cpus, but yesterday when I booted up with maxcpus=2,
I didn't see the other 2 cpus.

> I'll send a patch that fixes that tomorrow.
>

greate :)