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authorVaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>2010-02-08 15:35:55 +0530
committerGreg Kroah-Hartman <gregkh@suse.de>2010-03-15 09:07:12 -0700
commit39226dabf8fe6cbd07ce5c5155f43c25b48abbd1 (patch)
tree58324792f5e972cded378885c324f4f4b3b10e8b
parent065bc5cd9917ac5ae2c26c4ac9adecdae437a17a (diff)
sched: Fix sched_mv_power_savings for !SMT
commit 28f5318167adf23b16c844b9c2253f355cb21796 upstream. Fix for sched_mc_powersavigs for pre-Nehalem platforms. Child sched domain should clear SD_PREFER_SIBLING if parent will have SD_POWERSAVINGS_BALANCE because they are contradicting. Sets the flags correctly based on sched_mc_power_savings. Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <20100208100555.GD2931@dirshya.in.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--include/linux/sched.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 78efe7c485ac..1f5fa53b46b1 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -878,7 +878,10 @@ static inline int sd_balance_for_mc_power(void)
if (sched_smt_power_savings)
return SD_POWERSAVINGS_BALANCE;
- return SD_PREFER_SIBLING;
+ if (!sched_mc_power_savings)
+ return SD_PREFER_SIBLING;
+
+ return 0;
}
static inline int sd_balance_for_package_power(void)