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On 7/23/07, Jeremy Fitzhardinge <jeremy@goop.org> wrote: > Ray Lee wrote: > > That said, I'm willing to run my day to day life through both a swap > > prefetch kernel and a normal one. *However*, before I go through all > > the work of instrumenting the damn thing, I'd really like Andrew (or > > Linus) to lay out his acceptance criteria on the feature. Exactly what > > *should* I be paying attention to? I've suggested keeping track of > > process swapin delay total time, and comparing with and without. Is > > that reasonable? Is it incomplete? > > Um, isn't it up to you? Huh? I'm not Linus or Andrew, with the power to merge a patch to the 2.6 kernel, so I think that the answer to that is a really clear 'No.' > 4. Does it make anything worse? A lot or a little? Rare corner > cases, or a real world usage? Again, numbers make the case most > strongly. > > I can't say I've been following this particular feature very closely, > but these are the fundamental questions that need to be dealt with in > merging any significant change. And as Nick says, historically point 4 > is very important in VM tuning changes, because "obvious" improvements > have often ended up giving pathologically bad results on unexpected > workloads. Dude. My whole question was *what* numbers. Please go back and read it all again. Maybe I was unclear, but I really don't think so. - 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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