memory-hotplug: build zonelists when offlining pages
online_pages() does build_all_zonelists() and zone_pcp_update(), I think
offline_pages() should do it too.
When the zone has no memory to allocate, remove it from other nodes'
zonelists. zone_batchsize() depends on zone's present pages, if zone's
present pages are changed, zone's pcp should be updated.
Signed-off-by: Xishi Qiu <qiuxishi@huawei.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 6a5b90d..b3501615 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -970,8 +970,13 @@
init_per_zone_wmark_min();
- if (!populated_zone(zone))
+ if (!populated_zone(zone)) {
zone_pcp_reset(zone);
+ mutex_lock(&zonelists_mutex);
+ build_all_zonelists(NULL, NULL);
+ mutex_unlock(&zonelists_mutex);
+ } else
+ zone_pcp_update(zone);
if (!node_present_pages(node)) {
node_clear_state(node, N_HIGH_MEMORY);