linux-kernel - Re: [PATCH][for 2.6.28] powerpc: Use physical cpu id when setting the processor affinity

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Message-Id: <1228253423.7356.195.camel@pasglop>
Date:	Wed, 03 Dec 2008 08:30:23 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Kumar Gala <galak@...nel.crashing.org>
Cc:	Paul Mackerras <paulus@...ba.org>, Andrew Morton <akpm@...l.org>,
	linuxppc-dev@...abs.org, Linus Torvalds <torvalds@...l.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH][for 2.6.28] powerpc: Use physical cpu id when setting
 the processor affinity

On Tue, 2008-12-02 at 13:37 -0600, Kumar Gala wrote:
> In the CONFIG_SMP case the irq_choose_cpu() code was returning back
> a logical cpu id not the physical id.  We were writing that directly
> into the HW register.
> 
> We need to be calling get_hard_smp_processor_id() so irq_choose_cpu()
> always returns a physical cpu id.

That will probably do for now but if we ever move that routine to
generic code, I'd rather have the caller do the conversion.

Cheers,
Ben.


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