[PATCH] milder kswapd

[Rik van Riel <H.H.vanRiel@fys.ruu.nl>]

Hi there,

since many of you have complained that kswapd is a tad
agressive in 2.1.89, I've made the following patch to
counter that 'bad behaviour'.

happy hacking,

Rik.

(and don't forget your /proc/sys/vm/swapctl!)
+-------------------------------------------+--------------------------+
| Linux: - LinuxHQ MM-patches page          | Scouting       webmaster |
|        - kswapd ask-him & complain-to guy | Vries    cubscout leader |
|     http://www.fys.ruu.nl/~riel/          | <H.H.vanRiel@fys.ruu.nl> |
+-------------------------------------------+--------------------------+

--- linux/mm/vmscan.c.orig	Wed Mar 11 16:23:17 1998
+++ linux/mm/vmscan.c	Wed Mar 11 16:25:52 1998
@@ -511,7 +511,6 @@
        printk ("Starting kswapd v%.*s\n", i, s);
 }
 
-#define MAX_SWAP_FAIL 3
 /*
  * The background pageout daemon.
  * Started as a kernel thread from the init process.
@@ -559,15 +558,8 @@
 		if (tries < min_free_pages) {
 			tries = min_free_pages;
 		}
-		else if (nr_free_pages < (free_pages_high + free_pages_low) / 2) {
+		else if (nr_free_pages < (free_pages_low + min_free_pages) / 2) 
 			tries <<= 1;
-			if (nr_free_pages < free_pages_low) {
-				tries <<= 1;
-				if (nr_free_pages <= min_free_pages) {
-					tries <<= 1;
-				}
-			}
-		}
 		while (tries--) {
 			int gfp_mask;