On Fri, Jul 06, 2012 at 09:24:00AM -0700, Linus Torvalds wrote:
> On Fri, Jul 6, 2012 at 6:01 AM, Theodore Ts'o <ty...@mit.edu> wrote:
> > What in the world is "fast count"? I've grepped for it,
> > and I can't find it.
>
> It's your own fast-pool counter that Matt was talking about.
When he said "check it against HZ", it confused me, since there's no
way to compare it against HZ. But yes, I can certainly not give any
credit for entropy if __IRQF_TIMER is set, or keep track of whether
the previous interrupt had __IRQF_TIMER set in its descriptor. That's
simple enough.
I thought he was saying there was some way to distinguish between
interrupts triggered by the clock interrupt versus other devices on
the same irq channel --- and I couldn't figure out any to do that in
an architecture independent way.
- Ted
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