Messages in this thread | | | Date | Sun, 13 May 2007 13:04:19 +0400 | From | Stas Sergeev <> | Subject | Re: [patch] make pit clocksource continuous |
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Hello.
Thomas Gleixner wrote: > The PIT can only be used as a clock source, when it is in periodic mode, > but it is never continuous. If we miss one PIT interrupt the time > keeping is hosed. OK, thank you and Daniel for the explanations about the flag, but now to the problem. Before hrtimer_switch_to_hres() is called, the check for timekeeping_is_continuous() is performed in tick_ckeck_oneshot_change(), and that check fails (by adding a flag I compel it to succeed). With that check failing, hrtimer_switch_to_hres() is never called, and the hrtimers do not work. That's why I posted that patch, but what would be the right way of getting the hrtimers to work? /proc/timer_list lists only the pit timesource. If I enable lapic then it is also listed, yet it doesn't help at all.
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