aboutsummaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorM.Baris Demiray <baris@labristeknoloji.com>2005-09-10 00:26:09 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-10 10:06:22 -0700
commitda5a5522709a030da91932d4d4c2b179a481a8c0 (patch)
tree7e7d528dcc1cccf71215ebb5b8774a849e5a1753 /kernel
parentfc38ed7531eefa332c8c69ee288487860cd6b426 (diff)
[PATCH] sched: make idlest_group/cpu cpus_allowed-aware
Add relevant checks into find_idlest_group() and find_idlest_cpu() to make them return only the groups that have allowed CPUs and allowed CPUs respectively. Signed-off-by: M.Baris Demiray <baris@labristeknoloji.com> Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index ef748e691608..bac23fb418f6 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -966,8 +966,11 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
int local_group;
int i;
+ /* Skip over this group if it has no CPUs allowed */
+ if (!cpus_intersects(group->cpumask, p->cpus_allowed))
+ goto nextgroup;
+
local_group = cpu_isset(this_cpu, group->cpumask);
- /* XXX: put a cpus allowed check */
/* Tally up the load of all CPUs in the group */
avg_load = 0;
@@ -992,6 +995,7 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
min_load = avg_load;
idlest = group;
}
+nextgroup:
group = group->next;
} while (group != sd->groups);
@@ -1003,13 +1007,18 @@ find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
/*
* find_idlest_queue - find the idlest runqueue among the cpus in group.
*/
-static int find_idlest_cpu(struct sched_group *group, int this_cpu)
+static int find_idlest_cpu(struct sched_group *group,
+ struct task_struct *p, int this_cpu)
{
+ cpumask_t tmp;
unsigned long load, min_load = ULONG_MAX;
int idlest = -1;
int i;
- for_each_cpu_mask(i, group->cpumask) {
+ /* Traverse only the allowed CPUs */
+ cpus_and(tmp, group->cpumask, p->cpus_allowed);
+
+ for_each_cpu_mask(i, tmp) {
load = source_load(i, 0);
if (load < min_load || (load == min_load && i == this_cpu)) {
@@ -1052,7 +1061,7 @@ static int sched_balance_self(int cpu, int flag)
if (!group)
goto nextlevel;
- new_cpu = find_idlest_cpu(group, cpu);
+ new_cpu = find_idlest_cpu(group, t, cpu);
if (new_cpu == -1 || new_cpu == cpu)
goto nextlevel;

Privacy Policy