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-rw-r--r--drivers/xen/balloon.c41
1 files changed, 40 insertions, 1 deletions
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index 8dc7109..efa4b36 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[] = {
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