Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-upstream

1 files changed, 40 insertions, 1 deletions

diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 8dc7109d61b..efa4b363ce7 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -298,6 +298,14 @@ static int decrease_reservation(unsigned long nr_pages)
 		frame_list[i] = pfn_to_mfn(pfn);
 
 		scrub_page(page);
+
+		if (!PageHighMem(page)) {
+			ret = HYPERVISOR_update_va_mapping(
+				(unsigned long)__va(pfn << PAGE_SHIFT),
+				__pte_ma(0), 0);
+			BUG_ON(ret);
+                }
+
 	}
 
 	/* Ensure that ballooned highmem pages don't have kmaps. */
@@ -490,7 +498,7 @@ static ssize_t store_target_kb(struct sys_device *dev,
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-	target_bytes = memparse(buf, &endchar);
+	target_bytes = simple_strtoull(buf, &endchar, 0) * 1024;
 
 	balloon_set_new_target(target_bytes >> PAGE_SHIFT);
 
@@ -500,8 +508,39 @@ static ssize_t store_target_kb(struct sys_device *dev,
 static SYSDEV_ATTR(target_kb, S_IRUGO | S_IWUSR,
 		   show_target_kb, store_target_kb);
 
+
+static ssize_t show_target(struct sys_device *dev, struct sysdev_attribute *attr,
+			      char *buf)
+{
+	return sprintf(buf, "%llu\n",
+		       (u64)balloon_stats.target_pages << PAGE_SHIFT);
+}
+
+static ssize_t store_target(struct sys_device *dev,
+			    struct sysdev_attribute *attr,
+			    const char *buf,
+			    size_t count)
+{
+	char *endchar;
+	unsigned long long target_bytes;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	target_bytes = memparse(buf, &endchar);
+
+	balloon_set_new_target(target_bytes >> PAGE_SHIFT);
+
+	return count;
+}
+
+static SYSDEV_ATTR(target, S_IRUGO | S_IWUSR,
+		   show_target, store_target);
+
+
 static struct sysdev_attribute *balloon_attrs[] = {
 	&attr_target_kb,
+	&attr_target,
 };
 
 static struct attribute *balloon_info_attrs[] = {