Messages in this thread | | | Date | Wed, 30 Jan 2002 14:21:11 +0100 | From | Martin Knoblauch <> | Subject | Re: [PATCH]: O(1) 2.4.17-J7 Tuneable Parameters |
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> [PATCH]: O(1) 2.4.17-J7 Tuneable Parameters > > > Hi Ingo, > > This patch synchronizes with J7 and I think makes the changes > you wished. A couple of important points: > > - This patch can be applied to EITHER 2.4.17 OR 2.4.18 pre 7 as > long as Ingo's J7 patch is applied first. > > - While I agree with you on not wanting these in the mainline kernel, > I ran Hackbench on one of our new Foster systems with and > without the tuneable parameters, and while the numbers do > degrade slightly, its rather suprisingly small. So dont be afraid > to use this as a system tuning aid. >
How big is the actual degradation in your test? IIR, Ingo is afraid that the tunables could easily screw things up, which of course is true. What about adding a kernel-build option that leaves the sysctl interface read-only by default and enables writing only if it is requested at build time?
That way the external interface stays constant.
Martin -- ------------------------------------------------------------------ Martin Knoblauch | email: Martin.Knoblauch@TeraPort.de TeraPort GmbH | Phone: +49-89-510857-309 C+ITS | Fax: +49-89-510857-111 http://www.teraport.de | Mobile: +49-170-4904759 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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