From: Nick Piggin <nickpiggin@yahoo.com.au>
To: Andi Kleen <ak@suse.de>
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: Fri, 20 Oct 2006 00:48:17 +1000 [thread overview]
Message-ID: <45379031.601@yahoo.com.au> (raw)
In-Reply-To: <200610191626.10662.ak@suse.de>
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.
--
SUSE Labs, Novell Inc.
Send instant messages to your online friends http://au.messenger.yahoo.com
next prev parent reply other threads:[~2006-10-19 14:49 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 [this message]
2006-10-19 14:50 ` Andi Kleen
2006-10-19 15:01 ` Daniel Walker
2006-10-19 18:27 ` john stultz
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