Hi
Users of 1GB RAM machines are having problems with the
machines swapping too soon. That happens due to the fact that
they got out of pages in the HIGH_MEM zone (only around 100MB
on that machines) and they begin to swap searching for pages
free in the NORMAL zone. That problem also appears with the
DMA zone. This is the same patch that I send to
2.4.0-test1-ac22-*
Later, Juan.
This patch does:
- We allocate for a zone with more than pages_high free pages if
possible.
diff -urN --exclude-from=/home/lfcia/quintela/work/kernel/exclude base/mm/page_alloc.c working/mm/page_alloc.c
--- base/mm/page_alloc.c Tue Jul 11 12:00:55 2000
+++ working/mm/page_alloc.c Tue Jul 11 17:39:07 2000
@@ -227,6 +227,23 @@
* We are falling back to lower-level zones if allocation
* in a higher zone fails.
*/
+
+ for (;;) {
+ zone_t *z = *(zone++);
+ if (!z)
+ break;
+ if (!z->size)
+ BUG();
+
+ /* If there are zones with a lot of free memory allocate from them */
+ if (z->free_pages > z->pages_high) {
+ struct page *page = rmqueue(z, order);
+ if (page)
+ return page;
+ }
+ }
+
+ zone = zonelist->zones;
for (;;) {
zone_t *z = *(zone++);
if (!z)
-- In theory, practice and theory are the same, but in practice they are different -- Larry McVoy- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Jul 15 2000 - 21:00:13 EST