Messages in this thread Patch in this message | | | Subject | Re: 2.6.21-rc7: HPET enabled freeze my machine at boot | From | john stultz <> | Date | Mon, 23 Apr 2007 15:53:05 -0700 |
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On Mon, 2007-04-23 at 15:30 -0700, john stultz wrote: > On Sat, 2007-04-21 at 20:07 -0300, Guilherme M. Schroeder wrote: > > john stultz wrote: > > > On 4/19/07, guilherme <guilherme@centralinf.com.br> wrote: > > >> Hi, > > >> > > >> If i enable "High Resolution Timer Support", my machine stops here at > > >> boot: > > >> > > >> Clocksource tsc unstable (delta = -297340790165 ns) > > >> Time: hpet clocksource has been installed. > > >> > > >> If i disable HPET, it boots fine. > > > > > > Hmmm.. What happens if you boot w/ clocksource=acpi_pm ? > > > > > > > > > > Boot ok with clocksource=acpi_pm and HPET enabled. > > Any clue? > > > I'm suspecting that your HPET counter is being stopped for some reason, > although why I have no idea. > > Just to get a clear picture, does this happen w/ "Tickless System > (Dynamic ticks)" disabled in the menuconfig? > > Thomas, might we be actually stopping the HPET counter instead of > disabling the HPET interrupt w/ dynticks?
Just a shot in the dark, but does this patch affect the behavior?
thanks -john
diff --git a/arch/i386/kernel/hpet.c b/arch/i386/kernel/hpet.c index 17d7345..14e76a5 100644 --- a/arch/i386/kernel/hpet.c +++ b/arch/i386/kernel/hpet.c @@ -183,9 +183,6 @@ static void hpet_set_mode(enum clock_event_mode mode, case CLOCK_EVT_MODE_UNUSED: case CLOCK_EVT_MODE_SHUTDOWN: - cfg = hpet_readl(HPET_T0_CFG); - cfg &= ~HPET_TN_ENABLE; - hpet_writel(cfg, HPET_T0_CFG); break; } }
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