[Xen-devel] [PATCH] xen/balloon: export balloon hotplug page stats to sysfs

[Wei Liu <wei.liu2@xxxxxxxxxx>]

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Cc: Konrad Wilk <konrad.wilk@xxxxxxxxxx>
Cc: David Vrabel <david.vrabel@xxxxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
---
 drivers/xen/xen-balloon.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/xen/xen-balloon.c b/drivers/xen/xen-balloon.c
index e555845..2d4c5a8 100644
--- a/drivers/xen/xen-balloon.c
+++ b/drivers/xen/xen-balloon.c
@@ -129,6 +129,11 @@ module_exit(balloon_exit);
 BALLOON_SHOW(current_kb, "%lu\n", PAGES2KB(balloon_stats.current_pages));
 BALLOON_SHOW(low_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_low));
 BALLOON_SHOW(high_kb, "%lu\n", PAGES2KB(balloon_stats.balloon_high));
+#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
+BALLOON_SHOW(hotplug_kb, "%lu\n", PAGES2KB(balloon_stats.hotplug_pages));
+BALLOON_SHOW(balloon_hotplug_kb, "%lu\n",
+            PAGES2KB(balloon_stats.balloon_hotplug));
+#endif
 
 static DEVICE_ULONG_ATTR(schedule_delay, 0444, balloon_stats.schedule_delay);
 static DEVICE_ULONG_ATTR(max_schedule_delay, 0644, 
balloon_stats.max_schedule_delay);
@@ -206,6 +211,10 @@ static struct attribute *balloon_info_attrs[] = {
        &dev_attr_current_kb.attr,
        &dev_attr_low_kb.attr,
        &dev_attr_high_kb.attr,
+#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
+       &dev_attr_hotplug_kb.attr,
+       &dev_attr_balloon_hotplug_kb.attr,
+#endif
        NULL
 };
 
-- 
1.7.10.4


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