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    SubjectRe: [PATCH] tick: add check for the existence of broadcast clock event device
    On Mon, 8 Jun 2009, Feng Tang wrote:
    > > 1) How do you calibrate the local APIC timer if you do not have some
    > > initial timer device ?
    > Yes, we have external timer device with the name "apbt"

    So that timer is initialized and registered before the local apic,
    right ?

    Why is the local APIC timer used at all ? The apbt timer should have a
    higher rating as the local APIC timer, so when APIC is registered it
    is not selected and the check in the broadcast functions

    !(dev->features & CLOCK_EVT_FEAT_C3STOP))

    should protect you because that bit is not set on your apbt device.

    Thanks,

    tglx


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