Messages in this thread | | | Subject | Re: x86 timer clean ups | From | john stultz <> | Date | 18 Oct 2002 14:37:25 -0700 |
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> I need a flag for the TSC stuff that allows me to turn it off completely > (the > voyagers run CPUs from physically different clocks, and TSC drift causes > huge > jitters in this case). > > How about two compile options: > > CONFIG_X86_TSC meaning check for TSC and use it if it's OK > CONFIG_X86_PIT meaning use the PIT timer if the TSC isn't OK (or isn't > wanted)
Hmmm. I was thinking of possibly doing something similar to the 2.4 CONFIG_X86_HAS_TSC and CONFGI_X86_TSC_DISABLE, but I believe Linus wasn't super happy about negative config options. You're usage sounds reasonable, but since this is a cleanup item, do you mind if we both look at the issue a bit more next week?
> P.S. what about this CONFIG_X86_CYCLONE thing? It doesn't seem to be > hooked > into the timer infrastructure, should it be?
Not right this second. I'm waiting for the summit subarch code to stabilize, then I'll hook it in correctly.
thanks -john
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