From: Andi Kleen <ak@suse.de>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Daniel Walker <dwalker@mvista.com>,
linux-kernel@vger.kernel.org, johnstul@us.ibm.com, mingo@elte.hu,
tglx@linutronix.de
Subject: Re: + i386-time-avoid-pit-smp-lockups.patch added to -mm tree
Date: Thu, 19 Oct 2006 16:50:25 +0200 [thread overview]
Message-ID: <200610191650.25678.ak@suse.de> (raw)
In-Reply-To: <45379031.601@yahoo.com.au>
On Thursday 19 October 2006 16:48, Nick Piggin wrote:
> Andi Kleen wrote:
> >>An SMP kernel can boot on UP hardware, in which case I think
> >>num_possible_cpus() will be 1, won't it?
> >
> >
> > 0 was a typo, i meant 1 for UP of course. 0 would be nonsensical.
>
> Sure, I realised that. For a UP kernel, the test will compile away.
>
> But Daniel seems to say there is dead code that could be compiled
> out for SMP kernels. I just don't think that is possible because the
> SMP kernel can boot a UP system where num_possible_cpus() is 1.
I thought he meant !CONFIG_SMP kernels.
-Andi
next prev parent reply other threads:[~2006-10-19 14:50 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200610112126.k9BLQqKG002529@shell0.pdx.osdl.net>
2006-10-19 13:44 ` + i386-time-avoid-pit-smp-lockups.patch added to -mm tree Daniel Walker
2006-10-19 13:47 ` Andi Kleen
2006-10-19 13:57 ` Daniel Walker
2006-10-19 14:05 ` Andi Kleen
2006-10-19 14:50 ` Daniel Walker
2006-10-19 14:22 ` Nick Piggin
2006-10-19 14:26 ` Andi Kleen
2006-10-19 14:48 ` Nick Piggin
2006-10-19 14:50 ` Andi Kleen [this message]
2006-10-19 15:01 ` Daniel Walker
2006-10-19 18:27 ` john stultz
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