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Am Mittwoch, 17. März 2004 17:51 schrieb Maciej W. Rozycki: ~~ snip ~~ > You need timer_ack set to one when either: > > 1. you use the I/O APIC NMI watchdog and you have a discrete APIC chip > (i.e. the 82489DX), > > or: > > 2. the timer interrupt (IRQ 0) goes through one of the APICs (whatever > way; we check three variations) and the TSC is non-functional (absent or > disabled). > > Since you have an integrated APIC and you use the TSC, you may have > timer_ack set to zero. That saves a few (possibly slow) I/O accesses and > works around problems that may arise due 8259A clone (in)compatibility or > bugs in SMM firmware. > > Maciej Well, my timer interrupt goes through the IO-APIC but I do have a functional TSC. Nevertheless my system requires timer_ack to be set... If it isn't, my CPU does not utilize its C2 state... Thomas - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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