mm/hotplug: free zone->pageset when a zone becomes empty

[mirror_ubuntu-artful-kernel.git] / mm / memory_hotplug.c

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 597d371329d390267e1ad194e7979bc79466cf0b..3ad25f9d1fc134dc09e9672fad40f508e12e9502 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -966,6 +966,9 @@ repeat:
 
        init_per_zone_wmark_min();
 
+       if (!populated_zone(zone))
+               zone_pcp_reset(zone);
+
        if (!node_present_pages(node)) {
                node_clear_state(node, N_HIGH_MEMORY);
                kswapd_stop(node);