[PATCH] [15/98] m68k/mm: Set all online nodes in N_NORMAL_MEMORY

[Andi Kleen]

2.6.35-longterm review patch.  If anyone has any objections, please let me know.

------------------
From: Michael Schmitz <schmitzmic@xxxxxxxxxxxxxx>

commit 4aac0b4815ba592052758f4b468f253d383dc9d6 upstream.

For m68k, N_NORMAL_MEMORY represents all nodes that have present memory
since it does not support HIGHMEM.  This patch sets the bit at the time
node_present_pages has been set by free_area_init_node.
At the time the node is brought online, the node state would have to be
done unconditionally since information about present memory has not yet
been recorded.

If N_NORMAL_MEMORY is not accurate, slub may encounter errors since it
uses this nodemask to setup per-cache kmem_cache_node data structures.

This pach is an alternative to the one proposed by David Rientjes
<rientjes@xxxxxxxxxx> attempting to set node state immediately when
bringing the node online.

Signed-off-by: Michael Schmitz <schmitz@xxxxxxxxxx>
Tested-by: Thorsten Glaser <tg@xxxxxxxxxx>
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>

---
 arch/m68k/mm/motorola.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux-2.6.35.y/arch/m68k/mm/motorola.c
===================================================================
--- linux-2.6.35.y.orig/arch/m68k/mm/motorola.c
+++ linux-2.6.35.y/arch/m68k/mm/motorola.c
@@ -300,6 +300,8 @@ void __init paging_init(void)
 		zones_size[ZONE_DMA] = m68k_memory[i].size >> PAGE_SHIFT;
 		free_area_init_node(i, zones_size,
 				    m68k_memory[i].addr >> PAGE_SHIFT, NULL);
+		if (node_present_pages(i))
+			node_set_state(i, N_NORMAL_MEMORY);
 	}
 }
 
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