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authorMike Galbraith <efault@gmx.de>2011-01-13 04:54:50 +0100
committerIngo Molnar <mingo@elte.hu>2011-01-18 15:09:42 +0100
commitf44937718ce3b8360f72f6c68c9481712517a867 (patch)
tree72b07f4daa686e10f90b666f5b61b66b30bbed2d /kernel/sched.c
parent8ecedd7a06d27a31dbb36fab88e2ba6e6edd43ca (diff)
downloadlinux-f44937718ce3b8360f72f6c68c9481712517a867.tar.bz2
sched, autogroup: Fix CONFIG_RT_GROUP_SCHED sched_setscheduler() failure
If CONFIG_RT_GROUP_SCHED is set, __sched_setscheduler() fails due to autogroup not allocating rt_runtime. Free unused/unusable rt_se and rt_rq, redirect RT tasks to the root task group, and tell __sched_setscheduler() that it's ok. Reported-and-tested-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Signed-off-by: Mike Galbraith <efault@gmx.de> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1294890890.8089.39.camel@marge.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/sched.c')
-rw-r--r--kernel/sched.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index a0eb0941fa84..6cbff6bd1a60 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -4871,7 +4871,8 @@ recheck:
* assigned.
*/
if (rt_bandwidth_enabled() && rt_policy(policy) &&
- task_group(p)->rt_bandwidth.rt_runtime == 0) {
+ task_group(p)->rt_bandwidth.rt_runtime == 0 &&
+ !task_group_is_autogroup(task_group(p))) {
__task_rq_unlock(rq);
raw_spin_unlock_irqrestore(&p->pi_lock, flags);
return -EPERM;