From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754870AbaEHRXm (ORCPT ); Thu, 8 May 2014 13:23:42 -0400 Received: from shelob.surriel.com ([74.92.59.67]:53776 "EHLO shelob.surriel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752840AbaEHRXl (ORCPT ); Thu, 8 May 2014 13:23:41 -0400 From: riel@redhat.com To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, peterz@infradead.org, mgorman@suse.de, chegu_vinod@hp.com Subject: [PATCH 3/4] sched,numa: store numa_group's preferred nid Date: Thu, 8 May 2014 13:23:30 -0400 Message-Id: <1399569811-14362-4-git-send-email-riel@redhat.com> X-Mailer: git-send-email 1.8.5.3 In-Reply-To: <1399569811-14362-1-git-send-email-riel@redhat.com> References: <1399569811-14362-1-git-send-email-riel@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rik van Riel 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 Tested-by: Chegu Vinod --- 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