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SubjectRe: netperf ~50% regression with 2.6.33-rc1, bisect to 1b9508f
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On Mon, 2010-01-25 at 12:35 +0100, Mike Galbraith wrote:

> So. Rummaging around doing absolutely _nothing_ useful, there being
> zero movable tasks in this load, prevents us switching to the idle
> thread before the scheduling task is requeued. Oh joy.

Wait a minute. The only way that can work is if we hit contended lock,
and drop our rq lock (and where would busiest->nr_running > 1 come from
with a 2 task load?)
Puzzled.

-Mike



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