Re: rtmutex, pi_blocked_on, and blk_flush_plug()

[Sebastian Andrzej Siewior]

On 2023-02-16 15:18:03 [+0100], To Crystal Wood wrote:
> On 2023-02-09 22:31:57 [-0600], Crystal Wood wrote:
> > Hello!
Hi,

> - spinlock_t invokes schedule_rtlock() which avoids sched_submit_work().
>   This is the behaviour as with !RT because it spins and does not submit
>   work either.
>   rwlock_t should be have the same way but invokes schedule() instead.
>   This looks wrong. And it could deadlock in sched_submit_work().

I have to correct myself. Also for rwlock_t it uses schedule_rtlock()
which means it does not invoke sched_submit_work().

There there I don't expect any deadlock here.

> > -Crystal

Sebastian