On Fri, 11 May 2007 10:07:17 -0700 (PDT)
Christoph Lameter <[email protected]> wrote:
> On Fri, 11 May 2007, Andrew Morton wrote:
>
> > yipes. percpu_counter_sum() is expensive.
>
> Capable of triggering NMI watchdog on 4096+ processors?
Well. That would be a millisecond per cpu which sounds improbable. And
we'd need to be calling it under local_irq_save() which we presently don't.
And nobody has reported any problems against the existing callsites.
But it's no speed demon, that's for sure.
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