Hi Linus,

Here are the two patches I sent you earlier today,
this time against 2.1.89-pre2.

The kswapd logic is almost completely redone. Basically,
kswapd tries (free_pages_high - nr_free_pages) times to
free a page, but when memory becomes tighter, the number
of tries become even higher.

Since the code is compiling as I write, I don't know if
the agression factor is right, but we can adjust that
later...

A nice sideeffect of this is, that when memory is being
allocated slowly, kswapd will behave itself much better
then when memory is allocated faster. In the latter case,
kswapd will also become _far_ more agressive. It's kinda
self-tuning, but just not yet :-)

As for the other patch, it simply copies kswapd's page-aging
behaviour for page cache (and swap cache) pages. Buffer
pages, and possibly other ones, are still thrown out as soon
as they're not used any more.

OK... wait and see if it compiles <wait...wait...wait...wait>:
Yup, it compiles without a hitch (only mprotect.c gives a
warning about an ambiguous else ... gcc-2.8.0).
And since there's no new code in action, I leave the rebooting
to you guys.

Rik.
+-----------------------------+------------------------------+
| For Linux mm-patches, go to | "I'm busy managing memory.." |
| my homepage (via LinuxHQ).  | H.H.vanRiel@fys.ruu.nl       |
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