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Date: Mon, 28 Mar 2011 11:23:10 +0200 From: Daniel Kiper <dkiper@...-space.pl> To: ian.campbell@...rix.com, akpm@...ux-foundation.org, andi.kleen@...el.com, haicheng.li@...ux.intel.com, fengguang.wu@...el.com, jeremy@...p.org, konrad.wilk@...cle.com, dan.magenheimer@...cle.com, v.tolstov@...fip.ru, pasik@....fi, dave@...ux.vnet.ibm.com, wdauchy@...il.com, rientjes@...gle.com, xen-devel@...ts.xensource.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: [PATCH 1/3] mm: Optimize pfn calculation in online_page() 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@...-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 -- 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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