Messages in this thread Patch in this message | | | Date | Mon, 28 Mar 2011 11:23:10 +0200 | From | Daniel Kiper <> | Subject | [PATCH 1/3] mm: Optimize pfn calculation in online_page() |
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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@net-space.pl> --- mm/memory_hotplug.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 321fc74..f0651ae 100644 --- a/mm/memory_hotplug.c +++ b/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); -- 1.5.6.5
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