linux/arch/s390/include/asm/topology.h
Heiko Carstens d68bddb732 [S390] topology: increase poll frequency if change is anticipated
Increase cpu topology change poll frequency if a change is anticipated.
Otherwise a user might be a bit confused to have to wait up to a minute
in order to see a change this should be visible immediatly.
However there is no guarantee that the change will happen during the
time frame the poll frequency is increased.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-12-27 11:27:12 +01:00

85 lines
1.8 KiB
C

#ifndef _ASM_S390_TOPOLOGY_H
#define _ASM_S390_TOPOLOGY_H
#include <linux/cpumask.h>
#include <asm/sysinfo.h>
struct cpu;
#ifdef CONFIG_SCHED_BOOK
extern unsigned char cpu_core_id[NR_CPUS];
extern cpumask_t cpu_core_map[NR_CPUS];
static inline const struct cpumask *cpu_coregroup_mask(int cpu)
{
return &cpu_core_map[cpu];
}
#define topology_core_id(cpu) (cpu_core_id[cpu])
#define topology_core_cpumask(cpu) (&cpu_core_map[cpu])
#define mc_capable() (1)
extern unsigned char cpu_book_id[NR_CPUS];
extern cpumask_t cpu_book_map[NR_CPUS];
static inline const struct cpumask *cpu_book_mask(int cpu)
{
return &cpu_book_map[cpu];
}
#define topology_book_id(cpu) (cpu_book_id[cpu])
#define topology_book_cpumask(cpu) (&cpu_book_map[cpu])
int topology_cpu_init(struct cpu *);
int topology_set_cpu_management(int fc);
void topology_schedule_update(void);
void store_topology(struct sysinfo_15_1_x *info);
void topology_expect_change(void);
#else /* CONFIG_SCHED_BOOK */
static inline void topology_schedule_update(void) { }
static inline int topology_cpu_init(struct cpu *cpu) { return 0; }
static inline void topology_expect_change(void) { }
#endif /* CONFIG_SCHED_BOOK */
#define POLARIZATION_UNKNOWN (-1)
#define POLARIZATION_HRZ (0)
#define POLARIZATION_VL (1)
#define POLARIZATION_VM (2)
#define POLARIZATION_VH (3)
extern int cpu_polarization[];
static inline void cpu_set_polarization(int cpu, int val)
{
#ifdef CONFIG_SCHED_BOOK
cpu_polarization[cpu] = val;
#endif
}
static inline int cpu_read_polarization(int cpu)
{
#ifdef CONFIG_SCHED_BOOK
return cpu_polarization[cpu];
#else
return POLARIZATION_HRZ;
#endif
}
#ifdef CONFIG_SCHED_BOOK
void s390_init_cpu_topology(void);
#else
static inline void s390_init_cpu_topology(void)
{
};
#endif
#define SD_BOOK_INIT SD_CPU_INIT
#include <asm-generic/topology.h>
#endif /* _ASM_S390_TOPOLOGY_H */