diff options
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 33b9b4841ee..2e490271acf 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -681,7 +681,7 @@ enum cpu_idle_type { #define SCHED_LOAD_SHIFT 10 #define SCHED_LOAD_SCALE (1L << SCHED_LOAD_SHIFT) -#define SCHED_LOAD_SCALE_FUZZ (SCHED_LOAD_SCALE >> 5) +#define SCHED_LOAD_SCALE_FUZZ (SCHED_LOAD_SCALE >> 1) #ifdef CONFIG_SMP #define SD_LOAD_BALANCE 1 /* Do load balancing on this domain. */ @@ -786,6 +786,22 @@ extern int partition_sched_domains(cpumask_t *partition1, #endif /* CONFIG_SMP */ +/* + * A runqueue laden with a single nice 0 task scores a weighted_cpuload of + * SCHED_LOAD_SCALE. This function returns 1 if any cpu is laden with a + * task of nice 0 or enough lower priority tasks to bring up the + * weighted_cpuload + */ +static inline int above_background_load(void) +{ + unsigned long cpu; + + for_each_online_cpu(cpu) { + if (weighted_cpuload(cpu) >= SCHED_LOAD_SCALE) + return 1; + } + return 0; +} struct io_context; /* See blkdev.h */ struct cpuset; @@ -935,6 +951,11 @@ struct task_struct { struct sched_class *sched_class; struct sched_entity se; +#ifdef CONFIG_PREEMPT_NOTIFIERS + /* list of struct preempt_notifier: */ + struct hlist_head preempt_notifiers; +#endif + unsigned short ioprio; #ifdef CONFIG_BLK_DEV_IO_TRACE unsigned int btrace_seq; |