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Date: Thu, 30 Oct 2008 13:38:50 +0900
From: Fernando Luis Vázquez Cao
<fernando@....ntt.co.jp>
To: akpm@...ux-foundation.org
Cc: kamezawa.hiroyu@...fujitsu.com, linux-kernel@...r.kernel.org
Subject: [PATCH] memcg: do not recalculate section unnecessarily in
init_section_page_cgroup
Signed-off-by: Fernando Luis Vazquez Cao <fernando@....ntt.co.jp>
---
diff -urNp linux-2.6.28-rc2-mm1-orig/mm/page_cgroup.c linux-2.6.28-rc2-mm1/mm/page_cgroup.c
--- linux-2.6.28-rc2-mm1-orig/mm/page_cgroup.c 2008-10-30 12:49:27.000000000 +0900
+++ linux-2.6.28-rc2-mm1/mm/page_cgroup.c 2008-10-30 12:52:41.000000000 +0900
@@ -99,13 +99,11 @@ struct page_cgroup *lookup_page_cgroup(s
int __meminit init_section_page_cgroup(unsigned long pfn)
{
- struct mem_section *section;
+ struct mem_section *section = __pfn_to_section(pfn);
struct page_cgroup *base, *pc;
unsigned long table_size;
int nid, index;
- section = __pfn_to_section(pfn);
-
if (section->page_cgroup)
return 0;
@@ -131,7 +129,6 @@ int __meminit init_section_page_cgroup(u
__init_page_cgroup(pc, pfn + index);
}
- section = __pfn_to_section(pfn);
section->page_cgroup = base - pfn;
total_usage += table_size;
return 0;
--
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