Messages in this thread | | | Date | Tue, 5 Apr 2022 13:28:16 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v2] ptrace: fix ptrace vs tasklist_lock race on PREEMPT_RT. |
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On Tue, Apr 05, 2022 at 12:29:03PM +0200, Oleg Nesterov wrote: > On 04/05, Peter Zijlstra wrote: > > > > As is, I think we can write task_is_stopped() like: > > > > #define task_is_stopped(task) ((task)->jobctl & JOBCTL_STOP_PENDING) > > > > Because jobctl is in fact the canonical state. > > Not really. JOBCTL_STOP_PENDING means that the task should stop. > > And this flag is cleared right before set_special_state(TASK_STOPPED) > in do_signal_stop(), see task_participate_group_stop().
Argh! More work then :-( Still, I really want to not have p->__state be actual unique state.
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