[patch] 2.4.0-test4 filemap.c

[Rik van Riel <riel@conectiva.com.br>]

Hi,

the patch below could make filemap.c better behaved.

this stuff is untested and since I don't really care
about tweaks to the old VM you shouldn't bother me
about it...

regards,

Rik
--
"What you're running that piece of shit Gnome?!?!"
       -- Miguel de Icaza, UKUUG 2000

http://www.conectiva.com/		http://www.surriel.com/



--- filemap.c.orig	Sat Jul 15 15:31:38 2000
+++ filemap.c	Sat Jul 15 15:33:26 2000
@@ -318,6 +318,14 @@
 			goto cache_unlock_continue;
 
 		/*
+		 * If we *really* have too much memory free in a zone,
+		 * we even won't drop the swap cache memory. We should
+		 * keep this limit high though, because that way balancing
+		 * between zones is faster.
+		 */
+		if (page->zone->free_pages > page->zone->pages_high * 2)
+			goto cache_unlock_continue;
+		/*
 		 * Is it a page swap page? If so, we want to
 		 * drop it if it is no longer used, even if it
 		 * were to be marked referenced..

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