linux-kernel - [PATCH -v4 2/2] bootmem, x86: Fix 32bit numa system without RAM on Node0

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Date:	Wed, 31 Mar 2010 20:45:27 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
CC:	linux-kernel@...r.kernel.org, Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH -v4 2/2] bootmem, x86: Fix 32bit numa system without RAM on
 Node0


When 32bit numa is used, free_all_bootmem() will still only go over with
node id 0.

If node 0 doesn't have RAM installed, We need to go with node1
because early_node_map still use 1 for all ranges, and ram from node1
become low ram.

this one fixes BOOTMEM path by loop bdata_list.

-v3: add more comments, and fix bootmem path too.
-v4: seperate from one big patch

Signed-off-by: Yinghai Lu <yinghai@...nel.org>

---
 mm/bootmem.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Index: linux-2.6/mm/bootmem.c
===================================================================
--- linux-2.6.orig/mm/bootmem.c
+++ linux-2.6/mm/bootmem.c
@@ -312,7 +312,13 @@ unsigned long __init free_all_bootmem(vo
 	 */
 	return free_all_memory_core_early(MAX_NUMNODES);
 #else
-	return free_all_bootmem_core(NODE_DATA(0)->bdata);
+	unsigned long total_pages = 0;
+	bootmem_data_t *bdata;
+
+	list_for_each_entry(bdata, &bdata_list, list)
+		total_pages += free_all_bootmem_core(bdata);
+
+	return total_pages;
 #endif
 }
 
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