Messages in this thread |  | | | Date | Tue, 10 Feb 2009 15:12:47 -0800 | | From | Andrew Morton <> | | Subject | Re: [PATCH] mm: remove zone->prev_prioriy |
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On Tue, 10 Feb 2009 19:57:01 +0900 MinChan Kim <minchan.kim@gmail.com> wrote:
> As you know, prev_priority is used as a measure of how much stress page reclaim. > But now we doesn't need it due to split-lru's way. > > I think it would be better to remain why prev_priority isn't needed any more > and how split-lru can replace prev_priority's role in changelog. > > In future, it help mm newbies understand change history, I think.
Yes, I'd be fascinated to see that explanation.
In http://groups.google.pn/group/linux.kernel/browse_thread/thread/fea9c9a0b43162a1 it was asserted that we intend to use prev_priority again in the future.
We discussed this back in November: http://lkml.indiana.edu/hypermail/linux/kernel/0811.2/index.html#00001 And I think that I still think that the VM got worse due to its (new) failure to track previous state. IIRC, the response to that concern was quite similar to handwavy waffling.
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