# HG changeset patch
# User kaf24@firebug.cl.cam.ac.uk
# Date 1148565283 -3600
# Node ID 79d74ce206bbd4a4bfc5fa4890b442522da03223
# Parent  1449c0f57b9dc55c85732401bce24a3cdc54ddbd
[BALLOON] Do not allow target to be set below two percent of maximum
memory size.
Signed-off-by: Keir Fraser <keir@xensource.com>


diff -r 1449c0f57b9d -r 79d74ce206bb linux-2.6-xen-sparse/drivers/xen/balloon/balloon.c
--- a/linux-2.6-xen-sparse/drivers/xen/balloon/balloon.c	Thu May 25 14:47:23 2006 +0100
+++ b/linux-2.6-xen-sparse/drivers/xen/balloon/balloon.c	Thu May 25 14:54:43 2006 +0100
@@ -360,6 +360,12 @@ static void balloon_process(void *unused
 /* Resets the Xen limit, sets new target, and kicks off processing. */
 static void set_new_target(unsigned long target)
 {
+	unsigned long min_target;
+
+	/* Do not allow target to reduce below 2% of maximum memory size. */
+	min_target = max_pfn / 50;
+	target = max(target, min_target);
+
 	/* No need for lock. Not read-modify-write updates. */
 	hard_limit   = ~0UL;
 	target_pages = target;