From 8d11e0218321fccc6912c4dcfbaf2095bad5d33a Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Fri, 29 Oct 2010 16:50:37 +0200 Subject: [S390] topology: add SCHED_MC config option This allows us to easily check for performance differences seen with !CONFIG_SCHED_MC and topology=off. Actually there shouldn't be any (besides a small overhead because of additional code). Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/Kconfig | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'arch/s390/Kconfig') diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 97146ab157e6..45a9bed4a3fb 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -196,9 +196,18 @@ config HOTPLUG_CPU can be controlled through /sys/devices/system/cpu/cpu#. Say N if you want to disable CPU hotplug. +config SCHED_MC + def_bool y + prompt "Multi-core scheduler support" + depends on SMP + help + Multi-core scheduler support improves the CPU scheduler's decision + making when dealing with multi-core CPU chips at a cost of slightly + increased overhead in some places. + config SCHED_BOOK bool "Book scheduler support" - depends on SMP + depends on SMP && SCHED_MC help Book scheduler support improves the CPU scheduler's decision making when dealing with machines that have several books. -- cgit