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SubjectRe: [patch] x86: make UV support optional
Jack Steiner wrote:
> On Tue, Jan 06, 2009 at 07:03:48AM +0100, Nick Piggin wrote:
>> UV is fairly rare.... and much of the support is already there to cope with
>> 32-bit builds. So this makes sense I think.
> Looks ok to me. One suggestion though. There is a MAXSMP config
> option. I would suggest enabling UV if MAXSMP is enabled. This
> will help ensure that UV is tested more frequently & may minimize
> regressions.
> --- jack

Nick - would you add something like this to your patch? Thanks! Mike
Subject: x86: enable UV when MAXSMP is configured.

We want UV code to be tested even for non-UV architectures. Enabling
MAXSMP specifies "maximizing the system capabitlity" and UV is one of
these methods. Also helps distros select the correct config options
for their default configurations.

Signed-off-by: Mike Travis <>
arch/x86/Kconfig | 1 +
1 file changed, 1 insertion(+)

--- linux-2.6-for-ingo.orig/arch/x86/Kconfig
+++ linux-2.6-for-ingo/arch/x86/Kconfig
@@ -616,6 +616,7 @@ config MAXSMP
bool "Configure Maximum number of SMP Processors and NUMA Nodes"
depends on X86_64 && SMP && DEBUG_KERNEL && EXPERIMENTAL
+ select X86_UV
default n
Configure maximum number of CPUS and NUMA Nodes for this architecture.

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