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Oleg Nesterov <oleg@tv-sign.ru> wrote:
>
> + /*
> + * We are locking ->it_lock + tasklist_lock backwards
> + * from release_task()->exit_itimers(), beware deadlock.
> + */
> + leader = timr->it_process->group_leader;
> + while (unlikely(!read_trylock(&tasklist_lock))) {
> + if (leader->flags & PF_EXITING) {
> + smp_rmb();
> + if (thread_group_empty(leader))
> + return 0;
> + }
> + cpu_relax();
> + }
Oh dear. Is there no way to fix this up by taking the locks in the correct
order? (Whatever that is).
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