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sched/numa: Export info needed for NUMA balancing on complex topologies

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Export some information that is necessary to do placement of
tasks on systems with multi-level NUMA topologies.

Signed-off-by: Rik van Riel <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Linus Torvalds <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Rik van Riel authored and Ingo Molnar committed 2014-10-28 10:47:47 +01:00
1 parent f3a7e1a9c4
commit 9942f79baa
2 files changed
+8 -1
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kernel/sched/core.c
+3 -1
View File
@@ -6129,6 +6129,7 @@ static void claim_allocations(int cpu, struct sched_domain *sd)
#ifdef CONFIG_NUMA
static int sched_domains_numa_levels;
static int *sched_domains_numa_distance;
int sched_max_numa_distance;
static struct cpumask ***sched_domains_numa_masks;
static int sched_domains_curr_level;
#endif
@@ -6300,7 +6301,7 @@ static void sched_numa_warn(const char *str)
printk(KERN_WARNING "\n");
}
static bool find_numa_distance(int distance)
bool find_numa_distance(int distance)
{
int i;
@@ -6447,6 +6448,7 @@ static void sched_init_numa(void)
sched_domain_topology = tl;
sched_domains_numa_levels = level;
sched_max_numa_distance = sched_domains_numa_distance[level - 1];
}
static void sched_domains_numa_masks_set(int cpu)
kernel/sched/sched.h
+5
View File
@@ -678,6 +678,11 @@ static inline u64 rq_clock_task(struct rq *rq)
return rq->clock_task;
}
#ifdef CONFIG_NUMA
extern int sched_max_numa_distance;
extern bool find_numa_distance(int distance);
#endif
#ifdef CONFIG_NUMA_BALANCING
extern void sched_setnuma(struct task_struct *p, int node);
extern int migrate_task_to(struct task_struct *p, int cpu);