linux-kernel - [PATCH 5/5] mm: clear N_HIGH_MEMORY map before se set it again -v2

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Message-ID: <4A0C4A2A.6080009@kernel.org>
Date:	Thu, 14 May 2009 09:43:22 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Mel Gorman <mel@....ul.ie>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Christoph Lameter <cl@...ux-foundation.org>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jack Steiner <steiner@....com>,
	David Rientjes <rientjes@...gle.com>
Subject: [PATCH 5/5] mm: clear N_HIGH_MEMORY map before se set it again -v2


incase some system strange SRAT table. some kind of small range.
or with mem= etc

v2: fix typo

Signed-off-by: Yinghai Lu <Yinghai@...nel.org>
Tested-by: Jack Steiner <steiner@....com>

---
 mm/page_alloc.c |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -4041,6 +4047,11 @@ void __init free_area_init_nodes(unsigne
 						early_node_map[i].start_pfn,
 						early_node_map[i].end_pfn);
 
+	/*
+	 * find_zone_movable_pfns_for_nodes/early_calculate_totalpages init
+	 * that node_mask, clear it at first
+	 */
+	nodes_clear(node_states[N_HIGH_MEMORY]);
 	/* Initialise every node */
 	mminit_verify_pageflags_layout();
 	setup_nr_node_ids();
--
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