linux-kernel - [PATCH v2 7/7] sched: powerpc: Add SD_SHARE

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Date:	Tue, 18 Mar 2014 18:56:49 +0100
From:	Vincent Guittot <vincent.guittot@...aro.org>
To:	peterz@...radead.org, mingo@...nel.org,
	linux-kernel@...r.kernel.org, dietmar.eggemann@....com,
	preeti@...ux.vnet.ibm.com, tony.luck@...el.com,
	fenghua.yu@...el.com, schwidefsky@...ibm.com,
	james.hogan@...tec.com, cmetcalf@...era.com,
	benh@...nel.crashing.org, linux@....linux.org.uk,
	linux-arm-kernel@...ts.infradead.org
Cc:	linaro-kernel@...ts.linaro.org,
	Vincent Guittot <vincent.guittot@...aro.org>
Subject: [PATCH v2 7/7] sched: powerpc: Add SD_SHARE_POWERDOMAIN for SMT level

Set the power domain dependency at SMT level of Power8 but keep the flag
clear at CPU level. The goal is to consolidate tasks on the threads of a
core up to a level as decribed in the link below:
https://lkml.org/lkml/2014/3/12/16

Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>
---
 arch/powerpc/kernel/smp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index c9cade5..fbbac3c 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -759,7 +759,7 @@ int setup_profiling_timer(unsigned int multiplier)
 /* cpumask of CPUs with asymetric SMT dependancy */
 static const int powerpc_smt_flags(void)
 {
-	int flags = SD_SHARE_CPUPOWER | SD_SHARE_PKG_RESOURCES;
+	int flags = SD_SHARE_CPUPOWER | SD_SHARE_PKG_RESOURCES | SD_SHARE_POWERDOMAIN;
 
 	if (cpu_has_feature(CPU_FTR_ASYM_SMT)) {
 		printk_once(KERN_INFO "Enabling Asymmetric SMT scheduling\n");
-- 
1.9.0

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