From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Andreas Schwab <schwab@suse.de>
Cc: Giuliano Pochini <pochini@denise.shiny.it>,
linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org,
spyro@f2s.com, rmk@arm.linux.org.uk,
Suresh Siddha <suresh.b.siddha@intel.com>
Subject: Re: /sys/devices/system/cpu/cpuX/online are missing
Date: Tue, 13 Mar 2007 10:11:59 +0100 [thread overview]
Message-ID: <20070313091159.GB9890@osiris.boeblingen.de.ibm.com> (raw)
In-Reply-To: <20070313090350.GA9890@osiris.boeblingen.de.ibm.com>
On Tue, Mar 13, 2007 at 10:03:50AM +0100, Heiko Carstens wrote:
> On Tue, Mar 13, 2007 at 01:39:25AM +0100, Andreas Schwab wrote:
> > Giuliano Pochini <pochini@denise.shiny.it> writes:
> >
> > > I had a look at arch/powerpc/kernel/smp.c but I'm not familiar at all with
> > > those parts of the kernel.
> >
> > See arch/powerpc/kernel/sysfs.c:topology_init. I don't think there is
> > anything to do here. You probably don't have CONFIG_HOTPLUG_CPU enabled.
>
> I was referring to arch/ppc not arch/powerpc. But it seems that arch/ppc
> doesn't support cpu hotplug anyway. So I guess it's indeed just a missing
> config option.
>
> Grepping a bit further shows that arm suffered by the change that inverted
> the logic if the 'online' attribute for cpus should appear. Since arm
> supports cpu hotplug but the patch left arm out, it doesn't work there
> anymore (cc'ing arm people: changeset 72486f1f8f0a2bc828b9d30cf4690cf2dd6807fc
> is most probably disabling cpu hotplug support on arm like it did on s390).
Should have cc'ed Suresh Siddha who caused the breakage ;)
next prev parent reply other threads:[~2007-03-13 9:13 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-11 21:26 /sys/devices/system/cpu/cpuX/online are missing Giuliano Pochini
2007-03-11 21:42 ` Lee Revell
2007-03-12 8:58 ` Heiko Carstens
2007-03-12 22:48 ` Giuliano Pochini
2007-03-13 0:39 ` Andreas Schwab
2007-03-13 9:03 ` Heiko Carstens
2007-03-13 9:11 ` Heiko Carstens [this message]
2007-03-13 9:40 ` Russell King
2007-03-13 9:56 ` Russell King
2007-03-14 23:30 ` Giuliano Pochini
2007-03-13 9:44 ` Andreas Schwab
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