The patch titled
mm: optimize pfn calculation in online_page()
has been added to the -mm tree. Its filename is
mm-optimize-pfn-calculation-in-online_page.patch
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------------------------------------------------------
Subject: mm: optimize pfn calculation in online_page()
From: Daniel Kiper <dkiper@xxxxxxxxxxxx>
If CONFIG_FLATMEM is enabled pfn is calculated in online_page() more than
once. It is possible to optimize that and use value established at
beginning of that function.
Signed-off-by: Daniel Kiper <dkiper@xxxxxxxxxxxx>
Acked-by: Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory_hotplug.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/memory_hotplug.c~mm-optimize-pfn-calculation-in-online_page mm/memory_hotplug.c
--- a/mm/memory_hotplug.c~mm-optimize-pfn-calculation-in-online_page
+++ a/mm/memory_hotplug.c
@@ -375,7 +375,7 @@ void online_page(struct page *page)
#endif
#ifdef CONFIG_FLATMEM
- max_mapnr = max(page_to_pfn(page), max_mapnr);
+ max_mapnr = max(pfn, max_mapnr);
#endif
ClearPageReserved(page);
_
Patches currently in -mm which might be from dkiper@xxxxxxxxxxxx are
origin.patch
mm-optimize-pfn-calculation-in-online_page.patch
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