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.
No need to disable interrupts. We tried it and it works, but there's a
faster way that doesn't disable interrupts. Look at Ingo Molnar's
current for 2.2 and 2.4 at
http://people.redhat.com/mingo/lowlatency-patches/
There in i386/kernel/entry.S, look for resched_fixup et al.
-- Jamie
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