Re: lowish-latency patch for 2.4.0-test9

From: Andi Kleen (
Date: Tue Oct 10 2000 - 08:34:25 EST

On Wed, Oct 11, 2000 at 12:20:16AM +1100, Andrew Morton wrote:
> b): disabling local interrupts prior to the final need_resched
> check to make this test atomic wrt interrupts. RESTORE_ALL
> will do the right thing and an intervening smp_send_reschedule()
> will be blocked until the return to user space.
> Seems too simple...

I think with that a

main() { for(;;) getpid(); }

program could kill a lot of your interrupt latency.

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