Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index 320e9a43d4cc0b34dbb846a110835c2d542c457d..b048ad8a11af1a2b1929ed074bbf3f8e6e81f856 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6879,7 +6879,12 @@ static int default_relax_domain_level = -1;
 
 static int __init setup_relax_domain_level(char *str)
 {
-       default_relax_domain_level = simple_strtoul(str, NULL, 0);
+       unsigned long val;
+
+       val = simple_strtoul(str, NULL, 0);
+       if (val < SD_LV_MAX)
+               default_relax_domain_level = val;
+
        return 1;
 }
 __setup("relax_domain_level=", setup_relax_domain_level);
@@ -7237,6 +7242,18 @@ void __attribute__((weak)) arch_update_cpu_topology(void)
 {
 }
 
+/*
+ * Free current domain masks.
+ * Called after all cpus are attached to NULL domain.
+ */
+static void free_sched_domains(void)
+{
+       ndoms_cur = 0;
+       if (doms_cur != &fallback_doms)
+               kfree(doms_cur);
+       doms_cur = &fallback_doms;
+}
+
 /*
  * Set up scheduler domains and groups. Callers must hold the hotplug lock.
  * For now this just excludes isolated cpus, but could be used to
@@ -7384,6 +7401,7 @@ int arch_reinit_sched_domains(void)
        get_online_cpus();
        mutex_lock(&sched_domains_mutex);
        detach_destroy_domains(&cpu_online_map);
+       free_sched_domains();
        err = arch_init_sched_domains(&cpu_online_map);
        mutex_unlock(&sched_domains_mutex);
        put_online_cpus();
@@ -7469,6 +7487,7 @@ static int update_sched_domains(struct notifier_block *nfb,
        case CPU_DOWN_PREPARE:
        case CPU_DOWN_PREPARE_FROZEN:
                detach_destroy_domains(&cpu_online_map);
+               free_sched_domains();
                return NOTIFY_OK;
 
        case CPU_UP_CANCELED:
@@ -7487,8 +7506,16 @@ static int update_sched_domains(struct notifier_block *nfb,
                return NOTIFY_DONE;
        }
 
+#ifndef CONFIG_CPUSETS
+       /*
+        * Create default domain partitioning if cpusets are disabled.
+        * Otherwise we let cpusets rebuild the domains based on the
+        * current setup.
+        */
+
        /* The hotplug lock is already held by cpu_up/cpu_down */
        arch_init_sched_domains(&cpu_online_map);
+#endif
 
        return NOTIFY_OK;
 }
@@ -7628,7 +7655,6 @@ static void init_tg_rt_entry(struct task_group *tg, struct rt_rq *rt_rq,
        else
                rt_se->rt_rq = parent->my_q;
 
-       rt_se->rt_rq = &rq->rt;
        rt_se->my_q = rt_rq;
        rt_se->parent = parent;
        INIT_LIST_HEAD(&rt_se->run_list);