* Frederic Weisbecker <[email protected]> wrote:
> The timekeeping job must be able to run early on boot
> because there may be some pre-SMP (and thus pre-initcalls )
> components that rely on it. The IO-APIC is one such users
> as it tests the timer health by watching jiffies progression.
Btw., while I agree that a conservative mode is probably wise for bootup,
that IO-APIC assumption could be fixed or even removed.
If the IO-APIC code wants to know whether an interrupt fired, it can take
a look at the kstat_irqs numbers?
Also, could we restrict the boot CPU's mode only during the early bootup
stage - i.e. until we are ready to execute user-space init?
Thaks,
Ingo
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