The function get_page_bootmem() may be called more than one time to the same page. There is no need to set page's type, private if the function is not the first time called to the page. Note: the patch is just optimization and does not fix any problem. CC: David Rientjes <rientjes@xxxxxxxxxx> CC: Jiang Liu <liuj97@xxxxxxxxx> CC: Len Brown <len.brown@xxxxxxxxx> CC: Christoph Lameter <cl@xxxxxxxxx> Cc: Minchan Kim <minchan.kim@xxxxxxxxx> CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> CC: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx> CC: Wen Congyang <wency@xxxxxxxxxxxxxx> Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx> --- mm/memory_hotplug.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) Index: linux-3.6/mm/memory_hotplug.c =================================================================== --- linux-3.6.orig/mm/memory_hotplug.c 2012-10-04 18:29:58.284676075 +0900 +++ linux-3.6/mm/memory_hotplug.c 2012-10-04 18:30:03.454680542 +0900 @@ -95,10 +95,17 @@ static void release_memory_resource(stru static void get_page_bootmem(unsigned long info, struct page *page, unsigned long type) { - page->lru.next = (struct list_head *) type; - SetPagePrivate(page); - set_page_private(page, info); - atomic_inc(&page->_count); + unsigned long page_type; + + page_type = (unsigned long)page->lru.next; + if (page_type < MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE || + page_type > MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE){ + page->lru.next = (struct list_head *)type; + SetPagePrivate(page); + set_page_private(page, info); + atomic_inc(&page->_count); + } else + atomic_inc(&page->_count); } /* reference to __meminit __free_pages_bootmem is valid -- To unsubscribe from this list: send the line "unsubscribe linux-s390" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html