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Commit 9942f79b authored by Rik van Riel's avatar Rik van Riel Committed by Ingo Molnar
Browse files

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



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

Signed-off-by: default avatarRik van Riel <riel@redhat.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: mgorman@suse.de
Cc: chegu_vinod@hp.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1413530994-9732-2-git-send-email-riel@redhat.com


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent f3a7e1a9

kernel/sched/core.c

+3 −1
Original line number Diff line number Diff line
@@ -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 −0
Original line number Diff line number Diff line
@@ -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);