| Date | Wed, 29 Sep 2021 17:17:28 +0200 | From | Peter Zijlstra <> | Subject | [PATCH v2 05/11] sched,livepatch: Use wake_up_if_idle() |
| |
Make sure to prod idle CPUs so they call klp_update_patch_state().
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- kernel/livepatch/transition.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/kernel/livepatch/transition.c +++ b/kernel/livepatch/transition.c @@ -413,8 +413,11 @@ void klp_try_complete_transition(void) for_each_possible_cpu(cpu) { task = idle_task(cpu); if (cpu_online(cpu)) { - if (!klp_try_switch_task(task)) + if (!klp_try_switch_task(task)) { complete = false; + /* Make idle task go through the main loop. */ + wake_up_if_idle(cpu); + } } else if (task->patch_state != klp_target_state) { /* offline idle tasks can be switched immediately */ clear_tsk_thread_flag(task, TIF_PATCH_PENDING);
|