Re: [PATCH] sched: avoid large irq-latencies in smp-balancing

[Nick Piggin]

On Thursday 08 November 2007 15:37, Gregory Haskins wrote:
> Peter Zijlstra wrote:
> > Bah, missed a hunk
> >
> > ---
> > Subject: sched: avoid large irq-latencies in smp-balancing
> >
> > SMP balancing is done with IRQs disabled and can iterate the full rq.
> > When rqs are large this can cause large irq-latencies. Limit the nr of
> > iterations on each run.
> >
> > Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> > CC: Peter Williams <pwil3058@xxxxxxxxxxxxxx>
>
> Tested-by: Gregory Haskins <ghaskins@xxxxxxxxxx> (as part of 23.1-rt11)

OK, but let's not make this default for mainline just yet please. There
are so many performance regression possibilities in 2.6.24 already that
we should go a little bit slower for now IMO.
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