Re: 2.6.27rc1 cannot boot more than 8CPUs

Max Krasnyansky
2008-08-06T03:54:56Z

Jeff Chua wrote:
> On Wed, Aug 6, 2008 at 11:31 AM, Max Krasnyansky <maxk@qualcomm.com> wrote:
>> You could try booting CONFIG_NR_CPUS=16 with maxcpus=8 (kernel command line option).
>> If it boots you can then try bringing the rest of the cpus online manually
>
> Ok, booted with CONFIG_NR_CPUS=16 with maxcpus=8, but can't find the
> rest of the CPUs.
>
> I can only find cpu0 to cpu7 ...
>
>
> drwxr-xr-x 4 root root 0 Aug 6 19:38 cpu0
> drwxr-xr-x 4 root root 0 Aug 6 19:38 cpu1
> drwxr-xr-x 4 root root 0 Aug 6 19:38 cpu2
> drwxr-xr-x 4 root root 0 Aug 6 19:38 cpu3
> drwxr-xr-x 4 root root 0 Aug 6 19:38 cpu4
> drwxr-xr-x 4 root root 0 Aug 6 19:38 cpu5
> drwxr-xr-x 4 root root 0 Aug 6 19:38 cpu6
> drwxr-xr-x 4 root root 0 Aug 6 19:38 cpu7
> -r--r--r-- 1 root root 4096 Aug 6 19:41 online
> -r--r--r-- 1 root root 4096 Aug 6 19:39 possible
> -r--r--r-- 1 root root 4096 Aug 6 19:38 present
> -rw-r--r-- 1 root root 4096 Aug 6 19:38 sched_mc_power_savings
>
> # cat online
> 0-7
> # cat possible
> 0-23
> # cat present
> 0-7

Are you running 32-bit kernel ?

Max