diff options
| author | Mike Galbraith <efault@gmx.de> | 2011-01-13 04:54:50 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-01-18 15:09:42 +0100 |
| commit | f44937718ce3b8360f72f6c68c9481712517a867 (patch) | |
| tree | 72b07f4daa686e10f90b666f5b61b66b30bbed2d /kernel/sched.c | |
| parent | 8ecedd7a06d27a31dbb36fab88e2ba6e6edd43ca (diff) | |
| download | lwn-f44937718ce3b8360f72f6c68c9481712517a867.tar.gz lwn-f44937718ce3b8360f72f6c68c9481712517a867.zip | |
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.c | 3 |
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; |