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authorDavid S. Miller <davem@davemloft.net>2009-03-05 05:06:47 -0500
committerDavid S. Miller <davem@davemloft.net>2009-03-05 05:06:47 -0500
commit508827ff0ac3981d420edac64a70de7f4e304d38 (patch)
treeb0cee8ddef9f0ceab68c388e4ae46b7295eb2cb5 /kernel/sched.c
parent2c3c3d02f28801d7ad2da4952b2c7ca6621ef221 (diff)
parent72e2240f181871675d3a979766330c91d48a1673 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Conflicts: drivers/net/tokenring/tmspci.c drivers/net/ucc_geth_mii.c
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 410eec404133..8e2558c2ba67 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -223,7 +223,7 @@ static void start_rt_bandwidth(struct rt_bandwidth *rt_b)
223{ 223{
224 ktime_t now; 224 ktime_t now;
225 225
226 if (rt_bandwidth_enabled() && rt_b->rt_runtime == RUNTIME_INF) 226 if (!rt_bandwidth_enabled() || rt_b->rt_runtime == RUNTIME_INF)
227 return; 227 return;
228 228
229 if (hrtimer_active(&rt_b->rt_period_timer)) 229 if (hrtimer_active(&rt_b->rt_period_timer))
@@ -9224,6 +9224,16 @@ static int sched_rt_global_constraints(void)
9224 9224
9225 return ret; 9225 return ret;
9226} 9226}
9227
9228int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk)
9229{
9230 /* Don't accept realtime tasks when there is no way for them to run */
9231 if (rt_task(tsk) && tg->rt_bandwidth.rt_runtime == 0)
9232 return 0;
9233
9234 return 1;
9235}
9236
9227#else /* !CONFIG_RT_GROUP_SCHED */ 9237#else /* !CONFIG_RT_GROUP_SCHED */
9228static int sched_rt_global_constraints(void) 9238static int sched_rt_global_constraints(void)
9229{ 9239{
@@ -9317,8 +9327,7 @@ cpu_cgroup_can_attach(struct cgroup_subsys *ss, struct cgroup *cgrp,
9317 struct task_struct *tsk) 9327 struct task_struct *tsk)
9318{ 9328{
9319#ifdef CONFIG_RT_GROUP_SCHED 9329#ifdef CONFIG_RT_GROUP_SCHED
9320 /* Don't accept realtime tasks when there is no way for them to run */ 9330 if (!sched_rt_can_attach(cgroup_tg(cgrp), tsk))
9321 if (rt_task(tsk) && cgroup_tg(cgrp)->rt_bandwidth.rt_runtime == 0)
9322 return -EINVAL; 9331 return -EINVAL;
9323#else 9332#else
9324 /* We don't support RT-tasks being in separate groups */ 9333 /* We don't support RT-tasks being in separate groups */