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Message-ID: <48992085.3050203@qualcomm.com>
Date: Tue, 05 Aug 2008 20:54:45 -0700
From: Max Krasnyansky <maxk@...lcomm.com>
To: Jeff Chua <jeff.chua.linux@...il.com>
CC: lkml <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.27rc1 cannot boot more than 8CPUs
Jeff Chua wrote:
> On Wed, Aug 6, 2008 at 11:31 AM, Max Krasnyansky <maxk@...lcomm.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
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