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SubjectRe: scheduler ignores need_resched flag in 2.2.x and 2.3.x?
> This  is what makes Ingo's latency patch less dangerous: need_resched is hard
> to set. Your scenario requires that an interrupt routine, interrupting
> kernel mode, set needs_resched. Where does this happen?

A process wake from interrupt state - eg a network event. Its not actually
that uncommon. The window is small however so it isnt likely to get hit

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