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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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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