On Thu, Feb 03, 2005 at 10:30:26PM +0100, Andi Kleen wrote: > On Thu, Feb 03, 2005 at 06:28:27AM -0800, Pallipadi, Venkatesh wrote: > > > > Hi John, Andrew, > > > > > > Can you check whether only the following change makes the problem go > > away. If yes, then it looks like a hardware issue. > > > > > hpet_writel(hpet_tick, HPET_T0_CMP); > > >+ hpet_writel(hpet_tick, HPET_T0_CMP); /* AK: why twice? */ > > > Ask Vojtech (cced), he wrote the x86-64 HPET code.
It took me a while to remember, but: The first write after writing TN_SETVAL to the config register sets the counter value, the second write sets the threshold. When you only do the first write you never set the threshold and interrupts won't be generated properly. -- Vojtech Pavlik SuSE Labs, SuSE CR - 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/
