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* x86_64: up to 255 or 256 CPUs?
@ 2007-02-20 0:06 Adrian Bunk
2007-02-20 0:42 ` William Lee Irwin III
0 siblings, 1 reply; 4+ messages in thread
From: Adrian Bunk @ 2007-02-20 0:06 UTC (permalink / raw)
To: ak; +Cc: discuss, linux-kernel
Quoting arch/x86_64/Kconfig:
<-- snip -->
...
config NR_CPUS
int "Maximum number of CPUs (2-256)"
range 2 255
...
<-- snip -->
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: x86_64: up to 255 or 256 CPUs?
2007-02-20 0:06 x86_64: up to 255 or 256 CPUs? Adrian Bunk
@ 2007-02-20 0:42 ` William Lee Irwin III
2007-02-20 9:35 ` Andi Kleen
0 siblings, 1 reply; 4+ messages in thread
From: William Lee Irwin III @ 2007-02-20 0:42 UTC (permalink / raw)
To: Adrian Bunk; +Cc: ak, discuss, linux-kernel
On Tue, Feb 20, 2007 at 01:06:47AM +0100, Adrian Bunk wrote:
> Quoting arch/x86_64/Kconfig:
> <-- snip -->
> ...
> config NR_CPUS
> int "Maximum number of CPUs (2-256)"
> range 2 255
> ...
> <-- snip -->
> cu
> Adrian
The broadcast APIC ID clashes with the 256th cpu.
-- wli
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: x86_64: up to 255 or 256 CPUs?
2007-02-20 0:42 ` William Lee Irwin III
@ 2007-02-20 9:35 ` Andi Kleen
0 siblings, 0 replies; 4+ messages in thread
From: Andi Kleen @ 2007-02-20 9:35 UTC (permalink / raw)
To: William Lee Irwin III; +Cc: Adrian Bunk, discuss, linux-kernel
On Tuesday 20 February 2007 01:42, William Lee Irwin III wrote:
> On Tue, Feb 20, 2007 at 01:06:47AM +0100, Adrian Bunk wrote:
> > Quoting arch/x86_64/Kconfig:
> > <-- snip -->
> > ...
> > config NR_CPUS
> > int "Maximum number of CPUs (2-256)"
> > range 2 255
> > ...
> > <-- snip -->
> > cu
> > Adrian
>
> The broadcast APIC ID clashes with the 256th cpu.
Yes 255 is theory. But we don't know if it actually works anyways because
it has been never tested.
-Andi
^ permalink raw reply [flat|nested] 4+ messages in thread
* x86_64: up to 255 or 256 CPUs?
@ 2007-01-11 7:01 Adrian Bunk
0 siblings, 0 replies; 4+ messages in thread
From: Adrian Bunk @ 2007-01-11 7:01 UTC (permalink / raw)
To: ak; +Cc: discuss, linux-kernel
Quoting arch/x86_64/Kconfig:
<-- snip -->
...
config NR_CPUS
int "Maximum number of CPUs (2-256)"
range 2 255
...
<-- snip -->
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-02-20 9:41 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2007-02-20 0:06 x86_64: up to 255 or 256 CPUs? Adrian Bunk
2007-02-20 0:42 ` William Lee Irwin III
2007-02-20 9:35 ` Andi Kleen
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2007-01-11 7:01 Adrian Bunk
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