Commit b53b5eda authored Nov 05, 2013 by Josh Boyer Committed by Ingo Molnar Nov 06, 2013

x86/cpu: Increase max CPU count to 8192



The MAXSMP option is intended to enable silly large numbers of
CPUs for testing purposes.  The current value of 4096 isn't very
silly any longer as there are actual SGI machines that approach
6096 CPUs when taking HT into account.

Increase the value to a nice round 8192 to account for this and
allow for short term future increases.

Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org>
Cc: prarit@redhat.com
Cc: Russ Anderson <rja@sgi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20131105143816.GK9944@hansolo.jdub.homelinux.org


[ Tweaked it so that MAXSMP simply sets the maximum of the normal range. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent bb61ccc7

arch/x86/Kconfig

+2 −2

Original line number	Diff line number	Diff line
		@@ -826,9 +826,9 @@ config NR_CPUS
		int "Maximum number of CPUs" if SMP && !MAXSMP
		range 2 8 if SMP && X86_32 && !X86_BIGSMP
		range 2 512 if SMP && !MAXSMP && !CPUMASK_OFFSTACK
		range 2 4096 if SMP && !MAXSMP && CPUMASK_OFFSTACK && X86_64
		range 2 8192 if SMP && !MAXSMP && CPUMASK_OFFSTACK && X86_64
		default "1" if !SMP
		default "4096" if MAXSMP
		default "8192" if MAXSMP
		default "32" if SMP && (X86_NUMAQ \|\| X86_SUMMIT \|\| X86_BIGSMP \|\| X86_ES7000)
		default "8" if SMP
		---help---