From: Gerd Hoffmann <kraxel@suse.de>
To: Rene Herman <rene.herman@keyaccess.nl>
Cc: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.17-rc3 -- SMP alternatives: switching to UP code
Date: Wed, 10 May 2006 11:28:42 +0200 [thread overview]
Message-ID: <4461B24A.7050805@suse.de> (raw)
In-Reply-To: <4461341B.7050602@keyaccess.nl>
Rene Herman wrote:
> Hi list.
>
> I just noticed this in the 2.6.17-rc3 dmesg:
>
> ===
> Checking 'hlt' instruction... OK.
> SMP alternatives: switching to UP code
> Freeing SMP alternatives: 0k freed
> ACPI: setting ELCR to 0400 (from 1608)
> ===
>
> Should I be seeing this "SMP alternatives" thing on a !CONFIG_SMP
> kernel? It does say 0k, but something is apparently being done at
> runtime still. Why?
The UP kernel has empty alternatives tables (as you've noticed), thus
the code doesn't do anything. Nevertheless it probably makes sense to
add a few #ifdef CONFIG_SMP lines to avoid confusing people and safe a
few bytes ...
cheers,
Gerd
--
Gerd Hoffmann <kraxel@suse.de>
Erst mal heiraten, ein, zwei Kinder, und wenn alles läuft
geh' ich nach drei Jahren mit der Familie an die Börse.
http://www.suse.de/~kraxel/julika-dora.jpeg
next prev parent reply other threads:[~2006-05-10 9:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-10 0:30 2.6.17-rc3 -- SMP alternatives: switching to UP code Rene Herman
2006-05-10 1:55 ` Chase Venters
2006-05-10 9:28 ` Gerd Hoffmann [this message]
2006-05-10 11:41 ` Rene Herman
2006-05-11 12:13 ` [patch] SMP alternatives: skip with UP kernels Gerd Hoffmann
2006-05-11 21:07 ` Rene Herman
2006-05-12 11:41 ` Gerd Hoffmann
2006-05-15 21:41 ` Rene Herman
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