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sched: Fix sched_mv_power_savings for !SMT 

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>
Cc: stable@kernel.org [2.6.32.x]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Vaidyanathan Srinivasan 2010-02-08 15:35:55 +05:30 committed by Thomas Gleixner
parent 50200df462
commit 28f5318167
1 changed files with 4 additions and 1 deletions
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5
include/linux/sched.h
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@ -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)