* [PATCH] zone_reclaim: do not unmap file backed pages
@ 2006-01-24 20:17 Christoph Lameter
0 siblings, 0 replies; only message in thread
From: Christoph Lameter @ 2006-01-24 20:17 UTC (permalink / raw)
To: akpm; +Cc: linux-mm
zone_reclaim should leave that to the real swapper. We are only
interested in evicting unmapped pages.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Index: linux-2.6.16-rc1-mm2/mm/vmscan.c
===================================================================
--- linux-2.6.16-rc1-mm2.orig/mm/vmscan.c 2006-01-23 10:02:23.000000000 -0800
+++ linux-2.6.16-rc1-mm2/mm/vmscan.c 2006-01-23 10:02:23.000000000 -0800
@@ -476,6 +476,12 @@ static int shrink_list(struct list_head
* processes. Try to unmap it here.
*/
if (page_mapped(page) && mapping) {
+ /*
+ * No unmapping if we do not swap
+ */
+ if (!sc->may_swap)
+ goto keep_locked;
+
switch (try_to_unmap(page, 0)) {
case SWAP_FAIL:
goto activate_locked;
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