On Fri, Oct 27, 2023 at 04:40:48PM +0200, Frederic Weisbecker wrote: > + /* Has the task been seen voluntarily sleeping? */ > + if (!READ_ONCE(t->on_rq)) > + return false;
> - if (t != current && READ_ONCE(t->on_rq) && !is_idle_task(t)) {
AFAICT this ->on_rq usage is outside of scheduler locks and that
READ_ONCE isn't going to help much.
Obviously a pre-existing issue, and I suppose all it cares about is
seeing a 0 or not, irrespective of the races, but urgh..
