[tip:x86/urgent] bootmem, x86: Fix 32bit numa system without RAM on node 0

From: tip-bot for Yinghai Lu
Date: Thu Apr 01 2010 - 18:58:28 EST

Commit-ID: aa235fc712f379d4194cff9217f07026c452c141
Gitweb: http://git.kernel.org/tip/aa235fc712f379d4194cff9217f07026c452c141
Author: Yinghai Lu <yinghai@xxxxxxxxxx>
AuthorDate: Wed, 31 Mar 2010 20:45:27 -0700
Committer: H. Peter Anvin <hpa@xxxxxxxxx>
CommitDate: Thu, 1 Apr 2010 14:41:19 -0700

bootmem, x86: Fix 32bit numa system without RAM on node 0

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, the lowest populated node
becomes low RAM.

This one fixes BOOTMEM path by iterating over the bdata_list.

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

Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
LKML-Reference: <4BB416D7.6090203@xxxxxxxxxx>
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx>
mm/bootmem.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/mm/bootmem.c b/mm/bootmem.c
index 2058cb7..ba37d62 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -312,7 +312,13 @@ unsigned long __init free_all_bootmem(void)
return free_all_memory_core_early(MAX_NUMNODES);
- 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;

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