Re: [PATCH 2/2] random: spread out jitter callback to different CPUs

From: Sebastian Andrzej Siewior
Date: Thu Oct 06 2022 - 02:46:38 EST

On 2022-10-05 23:08:19 [+0200], Jason A. Donenfeld wrote:
> Hi Sebastian,
Hi Jason,

> On Wed, Oct 05, 2022 at 07:26:42PM +0200, Sebastian Andrzej Siewior wrote:
> > That del_timer_sync() at the end is what you want. If the timer is
> > pending (as in enqueued in the timer wheel) then it will be removed
> > before it is invoked. If the timer's callback is invoked then it will
> > spin until the callback is done.
> del_timer_sync() is not guaranteed to succeed with add_timer_on() being
> used in conjunction with timer_pending() though. That's why I've
> abandoned this.

But why? The timer is added to a timer-base on a different CPU. Should

> Jason