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Subject[RFC PATCH v2 6/6] ARM: sched: clear SD_SHARE_POWERLINE
Date
The ARM platforms take advantage of packing small tasks on few cores.
This is true even when the cores of a cluster can't be power gated
independantly. So we clear SD_SHARE_POWERDOMAIN at MC and CPU level.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
arch/arm/kernel/topology.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index 79282eb..f89a4a2 100644
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -201,6 +201,15 @@ static inline void update_cpu_power(unsigned int cpuid, unsigned int mpidr) {}
*/
struct cputopo_arm cpu_topology[NR_CPUS];

+int arch_sd_local_flags(int level)
+{
+ /* Powergate at threading level doesn't make sense */
+ if (level & SD_SHARE_CPUPOWER)
+ return 1*SD_SHARE_POWERDOMAIN;
+
+ return 0*SD_SHARE_POWERDOMAIN;
+}
+
const struct cpumask *cpu_coregroup_mask(int cpu)
{
return &cpu_topology[cpu].core_sibling;
--
1.7.9.5


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