Messages in this thread Patch in this message | | | From | riel@redhat ... | Subject | [PATCH 3/4] sched,numa: store numa_group's preferred nid | Date | Thu, 8 May 2014 13:23:30 -0400 |
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From: Rik van Riel <riel@redhat.com>
Store a numa_group's preferred nid. Used by the next patch to pull workloads towards their preferred nodes.
Signed-off-by: Rik van Riel <riel@redhat.com> Tested-by: Chegu Vinod <chegu_vinod@hp.com> --- kernel/sched/fair.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 5925667..99cc829 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -864,6 +864,7 @@ struct numa_group { spinlock_t lock; /* nr_tasks, tasks */ int nr_tasks; + int preferred_nid; pid_t gid; struct list_head task_list; @@ -1642,6 +1643,7 @@ static void task_numa_placement(struct task_struct *p) if (p->numa_group) { update_numa_active_node_mask(p->numa_group); + p->numa_group->preferred_nid = max_group_nid; /* * If the preferred task and group nids are different, * iterate over the nodes again to find the best place. @@ -1701,6 +1703,7 @@ static void task_numa_group(struct task_struct *p, int cpupid, int flags, spin_lock_init(&grp->lock); INIT_LIST_HEAD(&grp->task_list); grp->gid = p->pid; + grp->preferred_nid = -1; /* Second half of the array tracks nids where faults happen */ grp->faults_cpu = grp->faults + NR_NUMA_HINT_FAULT_TYPES * nr_node_ids; -- 1.8.5.3
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