Merge branch 'linus' of master.kernel.org:/pub/scm/linux/kernel/git/perex/alsa

[linux-2.6-omap-h63xx.git] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index 5a91fe0b5de60bdff35e37fbe7ec570370488b75..0da2b2635c54b0257ceb3dcbdc49a8b9a5840762 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1521,6 +1521,12 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state, int sync)
                        unsigned long tl = this_load;
                        unsigned long tl_per_task;
 
+                       /*
+                        * Attract cache-cold tasks on sync wakeups:
+                        */
+                       if (sync && !task_hot(p, rq->clock, this_sd))
+                               goto out_set_cpu;
+
                        schedstat_inc(p, se.nr_wakeups_affine_attempts);
                        tl_per_task = cpu_avg_load_per_task(this_cpu);
 
@@ -1590,16 +1596,7 @@ out_activate:
                schedstat_inc(p, se.nr_wakeups_remote);
        update_rq_clock(rq);
        activate_task(rq, p, 1);
-       /*
-        * Sync wakeups (i.e. those types of wakeups where the waker
-        * has indicated that it will leave the CPU in short order)
-        * don't trigger a preemption, if the woken up task will run on
-        * this cpu. (in this case the 'I will reschedule' promise of
-        * the waker guarantees that the freshly woken up task is going
-        * to be considered on this CPU.)
-        */
-       if (!sync || cpu != this_cpu)
-               check_preempt_curr(rq, p);
+       check_preempt_curr(rq, p);
        success = 1;
 
 out_running:
@@ -5872,7 +5869,7 @@ static int cpu_to_core_group(int cpu, const cpumask_t *cpu_map,
                             struct sched_group **sg)
 {
        int group;
-       cpumask_t mask = cpu_sibling_map[cpu];
+       cpumask_t mask = per_cpu(cpu_sibling_map, cpu);
        cpus_and(mask, mask, *cpu_map);
        group = first_cpu(mask);
        if (sg)
@@ -5901,7 +5898,7 @@ static int cpu_to_phys_group(int cpu, const cpumask_t *cpu_map,
        cpus_and(mask, mask, *cpu_map);
        group = first_cpu(mask);
 #elif defined(CONFIG_SCHED_SMT)
-       cpumask_t mask = cpu_sibling_map[cpu];
+       cpumask_t mask = per_cpu(cpu_sibling_map, cpu);
        cpus_and(mask, mask, *cpu_map);
        group = first_cpu(mask);
 #else
@@ -6135,7 +6132,7 @@ static int build_sched_domains(const cpumask_t *cpu_map)
                p = sd;
                sd = &per_cpu(cpu_domains, i);
                *sd = SD_SIBLING_INIT;
-               sd->span = cpu_sibling_map[i];
+               sd->span = per_cpu(cpu_sibling_map, i);
                cpus_and(sd->span, sd->span, *cpu_map);
                sd->parent = p;
                p->child = sd;
@@ -6146,7 +6143,7 @@ static int build_sched_domains(const cpumask_t *cpu_map)
 #ifdef CONFIG_SCHED_SMT
        /* Set up CPU (sibling) groups */
        for_each_cpu_mask(i, *cpu_map) {
-               cpumask_t this_sibling_map = cpu_sibling_map[i];
+               cpumask_t this_sibling_map = per_cpu(cpu_sibling_map, i);
                cpus_and(this_sibling_map, this_sibling_map, *cpu_map);
                if (i != first_cpu(this_sibling_map))
                        continue;
@@ -6351,35 +6348,6 @@ static void detach_destroy_domains(const cpumask_t *cpu_map)
        arch_destroy_sched_domains(cpu_map);
 }
 
-/*
- * Partition sched domains as specified by the cpumasks below.
- * This attaches all cpus from the cpumasks to the NULL domain,
- * waits for a RCU quiescent period, recalculates sched
- * domain information and then attaches them back to the
- * correct sched domains
- * Call with hotplug lock held
- */
-int partition_sched_domains(cpumask_t *partition1, cpumask_t *partition2)
-{
-       cpumask_t change_map;
-       int err = 0;
-
-       cpus_and(*partition1, *partition1, cpu_online_map);
-       cpus_and(*partition2, *partition2, cpu_online_map);
-       cpus_or(change_map, *partition1, *partition2);
-
-       /* Detach sched domains from all of the affected cpus */
-       detach_destroy_domains(&change_map);
-       if (!cpus_empty(*partition1))
-               err = build_sched_domains(partition1);
-       if (!err && !cpus_empty(*partition2))
-               err = build_sched_domains(partition2);
-
-       register_sched_domain_sysctl();
-
-       return err;
-}
-
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
 static int arch_reinit_sched_domains(void)
 {