Re: /sys/devices/system/cpu/cpuX/online are missing

[Giuliano Pochini]

On Mon, 12 Mar 2007, Heiko Carstens wrote:

> On Sun, Mar 11, 2007 at 10:26:52PM +0100, Giuliano Pochini wrote:
> > Since 2.6.20 /sys/devices/system/cpu/cpuX/online isn't there anymore. The
> > directories exist, though. I also tested linux-2.6.21rc3. I had a look at the
> > archives and I found nothing about the removal of that file, which is still
> > documented in Documentation/cpu-hotplug.txt. I don't know if other
> > architectures are affected.
> >
> > $ uname -a
> > Linux Jay 2.6.20 #1 SMP Mon Feb 5 22:42:18 CET 2007 ppc 7455, altivec supported PowerMac3,6 GNU/Linux
> >
> > No cpusets. CONFIG_HOTPLUG_CPU=y
>
> Somebody inverted the logic when and if the 'online' attribute for cpu devices
> appear. See 72486f1f8f0a2bc828b9d30cf4690cf2dd6807fc.
> The fix for s390 is this: 6721f77810dfcb7cbf8e97be6fa43fe2740dd0aa.
> Looks like arch/ppc was left out as well.

I had a look at arch/powerpc/kernel/smp.c but I'm not familiar at all with 
those parts of the kernel. I'm cc'ing this message to linuxppc-dev.


--
Giuliano.
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