On 27 May 2001, Andi Kleen wrote:
> I think the right way to fix it is to do a final atomic check for
> softirqs when the kernel is exited. To be atomic this check neededs to
> be done with interrupts off until the kernel exited. [...]
check out my first softirq patch, it does exactly this. (but has the wrong
explanation.)
> [...] The same atomic check is needed for race free check of
> need_schedule (which is still racy on plain i386).
right, this need_resched race is fixed in the lowlatency patchset.
Ingo
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