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SubjectRe: [PATCH] mm: remove zone->prev_prioriy
On Tue, 10 Feb 2009 19:57:01 +0900
MinChan Kim <> 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.

it was asserted that we intend to use prev_priority again in the future.

We discussed this back in November:

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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