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SubjectRe: [patch 120/123] sched: Fix sched_mv_power_savings for !SMT
* Greg KH <gregkh@suse.de> [2010-03-12 16:13:38]:

> 2.6.33-stable review patch. If anyone has any objections, please let me know.

Hi Greg,

Thanks to pulling this into .32 and .33-stable. Please correct the
subject and commit message to sched_mc_power_savings when you apply.
The term sched_mv_power_savings is a typo.

"sched: Fix sched_mc_power_savings for !SMT"

Thanks,
Vaidy

Ref: http://lkml.org/lkml/2010/2/16/230

> -----------------
>
> From: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
>
> 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>
>
> ---
> include/linux/sched.h | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> --- a/include/linux/sched.h
> +++ b/include/linux/sched.h
> @@ -878,7 +878,10 @@ static inline int sd_balance_for_mc_powe
> 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)
>
>


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