This new flag SD SHARE_POWERLINE reflects the sharing of the power rail between the members of a domain. As this is the current assumption of the scheduler, the flag is added to all sched_domain
Signed-off-by: Vincent Guittot vincent.guittot@linaro.org --- arch/ia64/include/asm/topology.h | 1 + arch/tile/include/asm/topology.h | 1 + include/linux/sched.h | 1 + include/linux/topology.h | 3 +++ kernel/sched/core.c | 5 +++++ 5 files changed, 11 insertions(+)
diff --git a/arch/ia64/include/asm/topology.h b/arch/ia64/include/asm/topology.h index a2496e4..065c720 100644 --- a/arch/ia64/include/asm/topology.h +++ b/arch/ia64/include/asm/topology.h @@ -65,6 +65,7 @@ void build_cpu_to_node_map(void); | SD_BALANCE_EXEC \ | SD_BALANCE_FORK \ | SD_WAKE_AFFINE, \ + | arch_sd_share_power_line() \ .last_balance = jiffies, \ .balance_interval = 1, \ .nr_balance_failed = 0, \ diff --git a/arch/tile/include/asm/topology.h b/arch/tile/include/asm/topology.h index 7a7ce39..d39ed0b 100644 --- a/arch/tile/include/asm/topology.h +++ b/arch/tile/include/asm/topology.h @@ -72,6 +72,7 @@ static inline const struct cpumask *cpumask_of_node(int node) | 0*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 0*SD_SHARE_PKG_RESOURCES \ + | arch_sd_share_power_line() \ | 0*SD_SERIALIZE \ , \ .last_balance = jiffies, \ diff --git a/include/linux/sched.h b/include/linux/sched.h index 4786b20..74f2daf 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -862,6 +862,7 @@ enum cpu_idle_type { #define SD_WAKE_AFFINE 0x0020 /* Wake task to waking CPU */ #define SD_PREFER_LOCAL 0x0040 /* Prefer to keep tasks local to this domain */ #define SD_SHARE_CPUPOWER 0x0080 /* Domain members share cpu power */ +#define SD_SHARE_POWERLINE 0x0100 /* Domain members share power domain */ #define SD_SHARE_PKG_RESOURCES 0x0200 /* Domain members share cpu pkg resources */ #define SD_SERIALIZE 0x0400 /* Only a single load balancing instance */ #define SD_ASYM_PACKING 0x0800 /* Place busy groups earlier in the domain */ diff --git a/include/linux/topology.h b/include/linux/topology.h index fec12d6..20964ab 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -99,6 +99,7 @@ int arch_update_cpu_topology(void); | 1*SD_WAKE_AFFINE \ | 1*SD_SHARE_CPUPOWER \ | 1*SD_SHARE_PKG_RESOURCES \ + | arch_sd_share_power_line() \ | 0*SD_SERIALIZE \ | 0*SD_PREFER_SIBLING \ | arch_sd_sibling_asym_packing() \ @@ -132,6 +133,7 @@ int arch_update_cpu_topology(void); | 0*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 1*SD_SHARE_PKG_RESOURCES \ + | arch_sd_share_power_line() \ | 0*SD_SERIALIZE \ , \ .last_balance = jiffies, \ @@ -163,6 +165,7 @@ int arch_update_cpu_topology(void); | 0*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 0*SD_SHARE_PKG_RESOURCES \ + | arch_sd_share_power_line() \ | 0*SD_SERIALIZE \ | 1*SD_PREFER_SIBLING \ , \ diff --git a/kernel/sched/core.c b/kernel/sched/core.c index d50fbac..dab7908 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6407,6 +6407,11 @@ int __weak arch_sd_sibling_asym_packing(void) return 0*SD_ASYM_PACKING; }
+int __weak arch_sd_share_power_line(void) +{ + return 1*SD_SHARE_POWERLINE; +} + /* * Initializers for schedule domains * Non-inlined to reduce accumulated stack pressure in build_sched_domains()