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authorHeiko Carstens <heiko.carstens@de.ibm.com>2010-10-29 16:50:37 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-10-29 16:50:49 +0200
commit8d11e0218321fccc6912c4dcfbaf2095bad5d33a (patch)
tree6c26fd32b731c22027ed325d353fdd49ef34eaff /arch/s390/Kconfig
parentdb81a23d8003d1ca4452c6d728502780f0234368 (diff)
downloadlinux-linaro-android-8d11e0218321fccc6912c4dcfbaf2095bad5d33a.tar.gz
[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 <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Kconfig')
-rw-r--r--arch/s390/Kconfig11
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 97146ab157e..45a9bed4a3f 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.