Messages in this thread | | | Date | Wed, 7 Dec 2005 01:46:59 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH 01/16] mm: delayed page activation |
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Wu Fengguang <wfg@mail.ustc.edu.cn> wrote: > > Andrew, and anyone in the lkml, do you feel ok to test it in -mm tree?
Nope, sorry. I am wildly uninterested in large changes to page reclaim. Or to readahead, come to that.
That code has had years of testing, tweaking, tuning and poking. Large changes such as these will take as long as a year to get settled into the same degree of maturity. Both of these parts of the kernel are similar in that they are hit with an extraordinarly broad range of usage patterns and they both implement various predict-the-future heuristics. They are subtle and there is a lot of historical knowledge embedded in there.
What I would encourage you to do is to stop developing and testing new code. Instead, devote more time to testing, understanding and debugging the current code. If you find and fix a problem and can help us gain a really really really good understanding of the problem and the fix then great, we can run with that minimal-sized, minimal-impact, well-understood, well-tested fix.
See where I'm coming from? Experience teaches us to be super-cautious here. In these code areas especially we cannot afford to go making larger-than-needed changes because those changes will probably break things in ways which will take a long time to discover, and longer to re-fix. - 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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