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From: Daniel Phillips <phillips@arcor.de>
To: Andrew Morton <akpm@zip.com.au>
Subject: Re: [RFC] [PATCH] Include LRU in page count
Date: Mon, 2 Sep 2002 01:19:38 +0200
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Cc: Christian Ehrhardt <ehrhardt@mathematik.uni-ulm.de>,
       Linus Torvalds <torvalds@transmeta.com>,
       Marcelo Tosatti <marcelo@conectiva.com.br>,
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On Monday 02 September 2002 01:08, Andrew Morton wrote:
> Daniel Phillips wrote:
> It would be great to make presence on the LRU contribute to page->count, because
> that would permit the removal of a ton of page_cache_get/release operations inside
> the LRU lock, perhaps doubling throughput in there.

It's pretty much done, it just needs some torture testing:

   http://people.nl.linux.org/~phillips/patches/lru.race-2.4.19

The handy /proc/mmstat ad hoc statistics are still in there.  The patch supports
both zero and one-flavors of lru contribution to page count for the time being,
with the latter as the default.

> Guess I should get off my
> lazy butt and see what you've done (will you for heaven's sake go and buy an IDE
> disk and compile up a 2.5 kernel? :))

I was just thinking about that, time to go poke at the DAC960 again.  Yes I do
remember Jens and Bill offered to help :-)

-- 
Daniel
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