diff options
| -rw-r--r-- | include/linux/sched.h | 2 | ||||
| -rw-r--r-- | include/linux/topology.h | 2 | ||||
| -rw-r--r-- | kernel/sched_fair.c | 7 |
3 files changed, 8 insertions, 3 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index ee1f8899309..b4a39bb2b4a 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -805,7 +805,7 @@ enum cpu_idle_type { #define SD_BALANCE_FORK 0x0008 /* Balance on fork, clone */ #define SD_BALANCE_WAKE 0x0010 /* Balance on wakeup */ #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_POWERSAVINGS_BALANCE 0x0100 /* Balance for power savings */ #define SD_SHARE_PKG_RESOURCES 0x0200 /* Domain members share cpu pkg resources */ diff --git a/include/linux/topology.h b/include/linux/topology.h index 936ab2b3768..a6614b0242a 100644 --- a/include/linux/topology.h +++ b/include/linux/topology.h @@ -129,6 +129,7 @@ int arch_update_cpu_topology(void); | 1*SD_BALANCE_FORK \ | 1*SD_BALANCE_WAKE \ | 1*SD_WAKE_AFFINE \ + | 1*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 1*SD_SHARE_PKG_RESOURCES \ | 0*SD_SERIALIZE \ @@ -161,6 +162,7 @@ int arch_update_cpu_topology(void); | 1*SD_BALANCE_FORK \ | 1*SD_BALANCE_WAKE \ | 1*SD_WAKE_AFFINE \ + | 1*SD_PREFER_LOCAL \ | 0*SD_SHARE_CPUPOWER \ | 0*SD_SHARE_PKG_RESOURCES \ | 0*SD_SERIALIZE \ diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 280892e9d85..a37f311f436 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1360,7 +1360,7 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int flags) * If power savings logic is enabled for a domain, see if we * are not overloaded, if so, don't balance wider. */ - if (tmp->flags & SD_POWERSAVINGS_BALANCE) { + if (tmp->flags & (SD_POWERSAVINGS_BALANCE|SD_PREFER_LOCAL)) { unsigned long power = 0; unsigned long nr_running = 0; unsigned long capacity; @@ -1373,7 +1373,10 @@ static int select_task_rq_fair(struct task_struct *p, int sd_flag, int flags) capacity = DIV_ROUND_CLOSEST(power, SCHED_LOAD_SCALE); - if (nr_running/2 < capacity) + if (tmp->flags & SD_POWERSAVINGS_BALANCE) + nr_running /= 2; + + if (nr_running < capacity) break; } |