On Thu, 2006-11-16 at 16:26 -0500, Alan Stern wrote:
> On Thu, 16 Nov 2006, Thomas Gleixner wrote:
>
> > There is another issue with this SRCU change:
> >
> > The notification comes actually after the real change, which is bad. We
> > try to make the TSC usable by backing it with pm_timer accross such
> > states, but this behaviour breaks the safety code.
>
> I don't understand. Sending notifications is completely separate from
> setting up the notifier chain's head. The patch you mentioned didn't
> touch the code that sends the notifications.
Yeah, my bad. It just uses rcu based locking, but its still synchronous.
I have to dig deeper, why the change of the frequency happens _before_
the notifier arrives.
tglx
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
