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Message-Id: <1367451121-22725-5-git-send-email-cody@linux.vnet.ibm.com> Date: Wed, 1 May 2013 16:32:01 -0700 From: Cody P Schafer <cody@...ux.vnet.ibm.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: David Rientjes <rientjes@...gle.com>, Linux MM <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>, Cody P Schafer <cody@...ux.vnet.ibm.com> Subject: [PATCH v2 4/4] memory_hotplug: use pgdat_resize_lock() in __offline_pages() mmzone.h documents node_size_lock (which pgdat_resize_lock() locks) as guarding against changes to node_present_pages, so actually lock it when we update node_present_pages to keep that promise. Signed-off-by: Cody P Schafer <cody@...ux.vnet.ibm.com> --- mm/memory_hotplug.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 0bdca10..b59a695 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1582,7 +1582,11 @@ repeat: /* removal success */ zone->managed_pages -= offlined_pages; zone->present_pages -= offlined_pages; + + pgdat_resize_lock(zone->zone_pgdat, &flags); zone->zone_pgdat->node_present_pages -= offlined_pages; + pgdat_resize_unlock(zone->zone_pgdat, &flags); + totalram_pages -= offlined_pages; init_per_zone_wmark_min(); -- 1.8.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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