Re: [PATCH v2] random: set fast pool count to zero in cpuhp teardown

[Jason A. Donenfeld]

Hi Sebastian,

On Mon, Feb 14, 2022 at 4:06 PM Sebastian Andrzej Siewior
<bigeasy@xxxxxxxxxxxxx> wrote:
> But you acked my question regarding boot-up? So the teardown callback
> won't happen during boot-up.

I'd like to do only one method here, so we can set those fields in
startup, provided it happens early enough.
> > So I think it seems better to keep it before CPUHP_TIMERS_PREPARE, but
> > do it on startup rather than teardown. Seem reasonable? Would that
> > mean we zero out before IRQs are enabled?
> I would only zero it if the upper-most bit is there.

I still don't quite understand: why can't we just unconditionally
zero, always, before CPUHP_TIMERS_PREPARE?

> And then have another one after

Two of them seems a little bit out of hand in complexity here... Let's
just find one phase where we can simply set variables without too much
fiddly logic. I'll send a v+1 of what I have in mind for the startup
path.

Jason