path: root/mm
diff options
authorAndy Whitcroft <apw@shadowen.org>2007-08-22 14:01:03 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-22 19:52:44 -0700
commit85770ffe4f0cdd4396b17f14762adc25a571a348 (patch)
tree23f69f720e53cee67632b04c1754c3a7a64dab72 /mm
parentdf068464169a84a6a66c05d140f43a46d5eb6176 (diff)
sparsemem: ensure we initialise the node mapping for SPARSEMEM_STATIC
Booting SPARSEMEM on NUMA systems trips a BUG in page_alloc.c: Initializing HighMem for node 0 (00038000:00100000) Initializing HighMem for node 1 (00100000:001ffe00) ------------[ cut here ]------------ kernel BUG at /home/apw/git/linux-2.6/mm/page_alloc.c:456! [...] This occurs because the section to node id mapping is not being setup correctly during init under SPARSEMEM_STATIC, leading to an attempt to free pages from all nodes into the zones on node 0. When the zone_table[] was removed in the following commit, a new section to node mapping table was introduced: commit 89689ae7f95995723fbcd5c116c47933a3bb8b13 [PATCH] Get rid of zone_table[] That conversion inadvertantly only initialised the node mapping in SPARSEMEM_EXTREME. Ensure we initialise the node mapping in SPARSEMEM_STATIC. [akpm@linux-foundation.org: make the stubs static inline] Signed-off-by: Andy Whitcroft <apw@shadowen.org> Cc: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
1 files changed, 10 insertions, 4 deletions
diff --git a/mm/sparse.c b/mm/sparse.c
index 3047bf06c1f..239f5a720d3 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -41,6 +41,15 @@ int page_to_nid(struct page *page)
return section_to_node_table[page_to_section(page)];
+static void set_section_nid(unsigned long section_nr, int nid)
+ section_to_node_table[section_nr] = nid;
+#else /* !NODE_NOT_IN_PAGE_FLAGS */
+static inline void set_section_nid(unsigned long section_nr, int nid)
@@ -68,10 +77,6 @@ static int __meminit sparse_index_init(unsigned long section_nr, int nid)
struct mem_section *section;
int ret = 0;
- section_to_node_table[section_nr] = nid;
if (mem_section[root])
return -EEXIST;
@@ -148,6 +153,7 @@ void __init memory_present(int nid, unsigned long start, unsigned long end)
struct mem_section *ms;
sparse_index_init(section, nid);
+ set_section_nid(section, nid);
ms = __nr_to_section(section);
if (!ms->section_mem_map)