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authorLinus Torvalds <torvalds@linux-foundation.org>2008-03-21 10:05:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-03-21 10:05:19 -0700
commit028011e1391eab27e7bc113c2ac08d4f55584a75 (patch)
tree679c03b4cd668f07901b2ebafcaf5de7ab7cbe14
parent37bff62e98f675777e1e76173fe320f04062841d (diff)
parent22e52b072dd87faa9b2559fe89d4e8f2370f81ca (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel: sched: add arch_update_cpu_topology hook. sched: add exported arch_reinit_sched_domains() to header file. sched: remove double unlikely from schedule() sched: cleanup old and rarely used 'debug' features.
-rw-r--r--include/linux/sched.h1
-rw-r--r--include/linux/topology.h2
-rw-r--r--kernel/sched.c17
-rw-r--r--kernel/sched_fair.c14
4 files changed, 12 insertions, 22 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3625fcaf5d0..fed07d03364 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -790,6 +790,7 @@ struct sched_domain {
};
extern void partition_sched_domains(int ndoms_new, cpumask_t *doms_new);
+extern int arch_reinit_sched_domains(void);
#endif /* CONFIG_SMP */
diff --git a/include/linux/topology.h b/include/linux/topology.h
index 2d8dac8799c..bd14f8b30f0 100644
--- a/include/linux/topology.h
+++ b/include/linux/topology.h
@@ -50,6 +50,8 @@
for_each_online_node(node) \
if (nr_cpus_node(node))
+void arch_update_cpu_topology(void);
+
/* Conform to ACPI 2.0 SLIT distance definitions */
#define LOCAL_DISTANCE 10
#define REMOTE_DISTANCE 20
diff --git a/kernel/sched.c b/kernel/sched.c
index 3f7c5eb254e..28c73f07efb 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -594,18 +594,14 @@ enum {
SCHED_FEAT_NEW_FAIR_SLEEPERS = 1,
SCHED_FEAT_WAKEUP_PREEMPT = 2,
SCHED_FEAT_START_DEBIT = 4,
- SCHED_FEAT_TREE_AVG = 8,
- SCHED_FEAT_APPROX_AVG = 16,
- SCHED_FEAT_HRTICK = 32,
- SCHED_FEAT_DOUBLE_TICK = 64,
+ SCHED_FEAT_HRTICK = 8,
+ SCHED_FEAT_DOUBLE_TICK = 16,
};
const_debug unsigned int sysctl_sched_features =
SCHED_FEAT_NEW_FAIR_SLEEPERS * 1 |
SCHED_FEAT_WAKEUP_PREEMPT * 1 |
SCHED_FEAT_START_DEBIT * 1 |
- SCHED_FEAT_TREE_AVG * 0 |
- SCHED_FEAT_APPROX_AVG * 0 |
SCHED_FEAT_HRTICK * 1 |
SCHED_FEAT_DOUBLE_TICK * 0;
@@ -3886,7 +3882,7 @@ need_resched_nonpreemptible:
if (prev->state && !(preempt_count() & PREEMPT_ACTIVE)) {
if (unlikely((prev->state & TASK_INTERRUPTIBLE) &&
- unlikely(signal_pending(prev)))) {
+ signal_pending(prev))) {
prev->state = TASK_RUNNING;
} else {
deactivate_task(rq, prev, 1);
@@ -6811,6 +6807,10 @@ static int ndoms_cur; /* number of sched domains in 'doms_cur' */
*/
static cpumask_t fallback_doms;
+void __attribute__((weak)) arch_update_cpu_topology(void)
+{
+}
+
/*
* Set up scheduler domains and groups. Callers must hold the hotplug lock.
* For now this just excludes isolated cpus, but could be used to
@@ -6820,6 +6820,7 @@ static int arch_init_sched_domains(const cpumask_t *cpu_map)
{
int err;
+ arch_update_cpu_topology();
ndoms_cur = 1;
doms_cur = kmalloc(sizeof(cpumask_t), GFP_KERNEL);
if (!doms_cur)
@@ -6924,7 +6925,7 @@ match2:
}
#if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
-static int arch_reinit_sched_domains(void)
+int arch_reinit_sched_domains(void)
{
int err;
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index b85cac4b5e2..86a93376282 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -302,11 +302,6 @@ static u64 __sched_vslice(unsigned long rq_weight, unsigned long nr_running)
return vslice;
}
-static u64 sched_vslice(struct cfs_rq *cfs_rq)
-{
- return __sched_vslice(cfs_rq->load.weight, cfs_rq->nr_running);
-}
-
static u64 sched_vslice_add(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
return __sched_vslice(cfs_rq->load.weight + se->load.weight,
@@ -504,15 +499,6 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
} else
vruntime = cfs_rq->min_vruntime;
- if (sched_feat(TREE_AVG)) {
- struct sched_entity *last = __pick_last_entity(cfs_rq);
- if (last) {
- vruntime += last->vruntime;
- vruntime >>= 1;
- }
- } else if (sched_feat(APPROX_AVG) && cfs_rq->nr_running)
- vruntime += sched_vslice(cfs_rq)/2;
-
/*
* The 'current' period is already promised to the current tasks,
* however the extra weight of the new task will slow them down a