Commit a82a02a3 authored Feb 28, 2020 by Charan Teja Reddy Committed by Gerrit - the friendly Code Review server Mar 05, 2020

mm: memory_hotplug: wait on device_hotplug_lock in OOM path



Use lock_device_hotplug() inplace of lock_device_hotplug_sysfs() as the
latter can return immediately if there are any parallel
onlining/offlining of memory blocks.

Change-Id: Ica3cc286b7d4f87310f86e8c9e6db2157e511419
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>

parent a9013b58

mm/memory_hotplug.c

+1 −3

Original line number	Diff line number	Diff line
		@@ -1120,10 +1120,8 @@ bool try_online_one_block(int nid)
		{
		struct zone *zone = &NODE_DATA(nid)->node_zones[ZONE_MOVABLE];
		bool onlined_block = false;
		int ret = lock_device_hotplug_sysfs();

		if (ret)
		return false;
		lock_device_hotplug();

		walk_memory_range(zone->zone_start_pfn, zone_end_pfn(zone),
		&onlined_block, online_memory_one_block);