Re: [PATCH 0/3] cpuidle: updates related to tick_broadcast_enter() failures

From: Rafael J. Wysocki
Date: Wed May 13 2015 - 20:17:04 EST

On Wednesday, May 13, 2015 05:13:27 PM Kevin Hilman wrote:
> On Wed, May 13, 2015 at 5:16 PM, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
> > On Wednesday, May 13, 2015 03:59:55 PM Kevin Hilman wrote:
> >> "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx> writes:
> >>
> >> [...]
> >>
> >> > Second, quite honestly, I don't see a connection to genpd here.
> >>
> >> The connection with genpd is because the *reason* the timer was
> >> shutdown/stopped is because it shares power with the CPU, which is why
> >> the timer stops when the CPU hits ceratin low power states. IOW, it's
> >> in the same power domain as the CPU.
> >
> > Well, what if you don't have genpd on that system? Is the problem at hand not
> > relevant then magically?
> Well, if you're not using genpd to model hardware power domain
> dependencies, then yes you'll definitely need a different solution.
> And, as we discussed on IRC. If you only care about timers, and genpd
> is not in use, then $SUBJECT series is a fine approach, and I have no
> objections. But for SoCs where there are several other things that
> share power with CPU, we need a more generic, genpd based solution,
> which it seems we're in agreement on. And since the two approaches
> are not mutually exclusive, then I have real objections to applying
> this series.

I guess a "no" is missing in the last sentence. ;-)

> Acked-by: Kevin Hilman <khilman@xxxxxxxxxx>



To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at