Re: [PATCH] Revert "mm/memory-hotplug: fix lowmem count overflow when offline pages"

[Wanpeng Li <liwanp@linux.vnet.ibm.com>]

On Wed, Jul 31, 2013 at 05:50:02PM +0900, Joonyoung Shim wrote:
>This reverts commit cea27eb2a202959783f81254c48c250ddd80e129.
>
>Fixed to adjust totalhigh_pages when hot-removing memory by commit
>3dcc0571cd64816309765b7c7e4691a4cadf2ee7, so that commit occurs
>duplicated decreasing of totalhigh_pages.
>

Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>

>Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
>---
>The commit cea27eb2a202959783f81254c48c250ddd80e129 is only for stable,
>is it right?
>
> mm/page_alloc.c | 4 ----
> 1 file changed, 4 deletions(-)
>
>diff --git a/mm/page_alloc.c b/mm/page_alloc.c
>index b100255..2b28216 100644
>--- a/mm/page_alloc.c
>+++ b/mm/page_alloc.c
>@@ -6274,10 +6274,6 @@ __offline_isolated_pages(unsigned long start_pfn, unsigned long end_pfn)
> 		list_del(&page->lru);
> 		rmv_page_order(page);
> 		zone->free_area[order].nr_free--;
>-#ifdef CONFIG_HIGHMEM
>-		if (PageHighMem(page))
>-			totalhigh_pages -= 1 << order;
>-#endif
> 		for (i = 0; i < (1 << order); i++)
> 			SetPageReserved((page+i));
> 		pfn += (1 << order);
>-- 
>1.8.1.2
>
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