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authorDavid S. Miller <davem@davemloft.net>2012-09-28 14:40:49 -0400
committerDavid S. Miller <davem@davemloft.net>2012-09-28 14:40:49 -0400
commit6a06e5e1bb217be077e1f8ee2745b4c5b1aa02db (patch)
tree8faea23112a11f52524eb413f71b7b02712d8b53 /kernel/sched/core.c
parentd9f72f359e00a45a6cd7cc2d5121b04b9dc927e1 (diff)
parent6672d90fe779dc0dfffe027c3ede12609df091c2 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: drivers/net/team/team.c drivers/net/usb/qmi_wwan.c net/batman-adv/bat_iv_ogm.c net/ipv4/fib_frontend.c net/ipv4/route.c net/l2tp/l2tp_netlink.c The team, fib_frontend, route, and l2tp_netlink conflicts were simply overlapping changes. qmi_wwan and bat_iv_ogm were of the "use HEAD" variety. With help from Antonio Quartulli. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/sched/core.c')
-rw-r--r--kernel/sched/core.c39
1 files changed, 1 insertions, 38 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a4ea245f3d8..649c9f876cb 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6014,11 +6014,6 @@ static void destroy_sched_domains(struct sched_domain *sd, int cpu)
* SD_SHARE_PKG_RESOURCE set (Last Level Cache Domain) for this
* allows us to avoid some pointer chasing select_idle_sibling().
*
- * Iterate domains and sched_groups downward, assigning CPUs to be
- * select_idle_sibling() hw buddy. Cross-wiring hw makes bouncing
- * due to random perturbation self canceling, ie sw buddies pull
- * their counterpart to their CPU's hw counterpart.
- *
* Also keep a unique ID per domain (we use the first cpu number in
* the cpumask of the domain), this allows us to quickly tell if
* two cpus are in the same cache domain, see cpus_share_cache().
@@ -6032,40 +6027,8 @@ static void update_top_cache_domain(int cpu)
int id = cpu;
sd = highest_flag_domain(cpu, SD_SHARE_PKG_RESOURCES);
- if (sd) {
- struct sched_domain *tmp = sd;
- struct sched_group *sg, *prev;
- bool right;
-
- /*
- * Traverse to first CPU in group, and count hops
- * to cpu from there, switching direction on each
- * hop, never ever pointing the last CPU rightward.
- */
- do {
- id = cpumask_first(sched_domain_span(tmp));
- prev = sg = tmp->groups;
- right = 1;
-
- while (cpumask_first(sched_group_cpus(sg)) != id)
- sg = sg->next;
-
- while (!cpumask_test_cpu(cpu, sched_group_cpus(sg))) {
- prev = sg;
- sg = sg->next;
- right = !right;
- }
-
- /* A CPU went down, never point back to domain start. */
- if (right && cpumask_first(sched_group_cpus(sg->next)) == id)
- right = false;
-
- sg = right ? sg->next : prev;
- tmp->idle_buddy = cpumask_first(sched_group_cpus(sg));
- } while ((tmp = tmp->child));
-
+ if (sd)
id = cpumask_first(sched_domain_span(sd));
- }
rcu_assign_pointer(per_cpu(sd_llc, cpu), sd);
per_cpu(sd_llc_id, cpu) = id;