diff options
| author | Michal Koutný <mkoutny@suse.com> | 2025-03-10 18:04:38 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2025-04-08 20:55:54 +0200 |
| commit | 277e0909754e9f3c82def97150d2f3ea700098f1 (patch) | |
| tree | 66bcdb7adc54ecea87cb003a2dde7da141a47777 /kernel/sched/rt.c | |
| parent | 61d3164fec2ed283645dc17fcc51959e8f361e18 (diff) | |
sched: Bypass bandwitdh checks with runtime disabled RT_GROUP_SCHED
When RT_GROUPs are compiled but not exposed, their bandwidth cannot
be configured (and it is not initialized for non-root task_groups neither).
Therefore bypass any checks of task vs task_group bandwidth.
This will achieve behavior very similar to setups that have
!CONFIG_RT_GROUP_SCHED and attach cpu controller to cgroup v2 hierarchy.
(On a related note, this may allow having RT tasks with
CONFIG_RT_GROUP_SCHED and cgroup v2 hierarchy.)
Signed-off-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20250310170442.504716-7-mkoutny@suse.com
Diffstat (limited to 'kernel/sched/rt.c')
| -rw-r--r-- | kernel/sched/rt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index efa22bad31e1..5e82bfe56fdf 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -2864,7 +2864,7 @@ static int sched_rt_global_constraints(void) int sched_rt_can_attach(struct task_group *tg, struct task_struct *tsk) { /* Don't accept real-time tasks when there is no way for them to run */ - if (rt_task(tsk) && tg->rt_bandwidth.rt_runtime == 0) + if (rt_group_sched_enabled() && rt_task(tsk) && tg->rt_bandwidth.rt_runtime == 0) return 0; return 1; |