Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt

[Russell King]

On Thu, Jul 14, 2005 at 05:42:15PM -0700, Linus Torvalds wrote:
> So this is why I so strongly argue that we should have a constant HZ, but 
> a dynamic _increment_ of "jiffies". Nobody (obviously) depends on jiffies 
> being constant, so it's ok to increment jiffies by pretty much any value.

I agree.  Isn't this exactly what HZ=1000 with VST achieves?  We
know this works already...

> But I really wouldn't be surprised if the bogomips calibration loop was 
> really the only thing that needed some small tweaking for increments of 
> other than one.

Having run VST on ARM, VST must be disabled while the bogomips
calibrations have completed - I suspect VST requires some sort of
enable/disable counted system like we do for interrupts and the hlt
thing, so that the hotplug CPU code can do it's bogomips calibration
appropriately.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
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