Re: [6.5-rc5 regression] core dump hangs (was Re: [Bug report] fstests generic/051 (on xfs) hang on latest linux v6.5-rc5+)

[Linus Torvalds]

On Mon, Jun 12, 2023 at 9:45 AM Jens Axboe <axboe@xxxxxxxxx> wrote:
>
> You snipped the suspicion in my reply on why that exists, to avoid
> io_wq_worker_sleeping() triggering.

I'm not seeing why triggering io_wq_worker_sleeping() should even be a
problem in the first place.

I suspect that is entirely historical too, and has to do with how it
used to do that

        struct io_worker *worker = kthread_data(tsk);
        struct io_wqe *wqe = worker->wqe;

back in the bad old days of kthreads.

But yeah, I don't know that code.

              Linus