Buffer Memory

Heinz Mauelshagen (mauelsha@ez-darmstadt.telekom.de)
Wed, 10 Jun 1998 18:06:30 METDST

Buffer cache eats up main protions of physical memory in any i/o
intensive situation, no matter what /proc/sys/vm/buffermem percentage tells.

The following patch fixes this at least for me &*)

--- linux-2.1.105/fs/buffer.c Wed Jun 10 17:30:40 1998
+++ linux-2.1.105/fs/buffer.c.orig Fri Jun 5 07:53:50 1998
@@ -1590,10 +1590,6 @@
struct buffer_head * insert_point;
int isize;

- if ( nr_free_pages < freepages.min * 2 ||
- ( buffermem >> PAGE_SHIFT) * 100 >
- buffer_mem.max_percent * num_physpages) return 0;
-
if ((size & 511) || (size > PAGE_SIZE)) {
printk("VFS: grow_buffers: size = %d\n",size);
return 0;

Best regards,
Heinz

--


=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-


Systemmanagement Entwicklungsbereich 2           Deutsche Telekom AG
                                                 Entwicklungszentrum Darmstadt
Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
                                                 Postfach 10 05 41
mge@ez-darmstadt.telekom.de                      64205 Darmstadt
                                                 Germany
                                                 +49 6151 886-425
                                                          FAX-386
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu