Messages in this thread |  | | | Subject | Re: keyboard and USB problems (Re: 2.6.2-rc1-mm2) | | From | john stultz <> | | Date | Fri, 23 Jan 2004 11:27:41 -0800 |
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On Fri, 2004-01-23 at 08:19, Vojtech Pavlik wrote: > On Fri, Jan 23, 2004 at 05:01:52PM +0100, Rudo Thomas wrote: > > BogoMIPS is figured out to be 8.19 (this was already reported by another user), > > ... this the root cause of the following problems. > > > and i8042.c complaints with this: > > i8042.c: Can't write CTR while closing AUX. > > ... bogomips is used in udelay() and that's used for waiting. If > bogomips is measured lower than real, the wait takes shorter and the > hardware doesn't do what it should in that short time.
Well, loops_per_jiffy is actually being measured correctly as we're using the acpi pm timesource to time udelay(). However there is a loss of resolution using the slower time source, so udelay(1) might take longer then 1 us.
If that is going to cause problems, then we'll need to pull out the use-pmtmr-for-delay_pmtmr patch. I guess our only option is then to use the TSC for delay_pmtrm() (as a loop based delay fails in other cases). I'll write that up and send it your way, Andrew.
thanks -john
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