lkml.org 
[lkml]   [2014]   [Oct]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip:sched/core] sched/numa: Export info needed for NUMA balancing on complex topologies
Commit-ID:  9942f79baaaf111d63ebf0862a819278d84fccc4
Gitweb: http://git.kernel.org/tip/9942f79baaaf111d63ebf0862a819278d84fccc4
Author: Rik van Riel <riel@redhat.com>
AuthorDate: Fri, 17 Oct 2014 03:29:49 -0400
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Tue, 28 Oct 2014 10:47:47 +0100

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: Rik van Riel <riel@redhat.com>
Signed-off-by: Peter 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: Ingo Molnar <mingo@kernel.org>
---
kernel/sched/core.c | 4 +++-
kernel/sched/sched.h | 5 +++++
2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 240157c..4007595 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -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)
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 24156c84..443d6e1 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -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);

\
 
 \ /
  Last update: 2014-10-28 12:41    [W:0.096 / U:0.040 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site