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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>
This commit is contained in:
Xishi Qiu 2012-10-08 16:31:51 -07:00 committed by Linus Torvalds
parent 38a76013ad
commit 1e8537baac
1 changed files with 6 additions and 1 deletions
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7
mm/memory_hotplug.c
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@ -970,8 +970,13 @@ static int __ref offline_pages(unsigned long start_pfn,
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);