Commit 1e8537ba authored Oct 08, 2012 by Xishi Qiu Committed by Linus Torvalds Oct 09, 2012

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>

parent 38a76013

mm/memory_hotplug.c

+6 −1

Original line number	Original line	Diff line number	Diff line
	@@ -970,8 +970,13 @@ static int __ref offline_pages(unsigned long start_pfn,

	init_per_zone_wmark_min();		init_per_zone_wmark_min();

	if (!populated_zone(zone))		if (!populated_zone(zone)) {
	zone_pcp_reset(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)) {		if (!node_present_pages(node)) {
	node_clear_state(node, N_HIGH_MEMORY);		node_clear_state(node, N_HIGH_MEMORY);