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[IA64] Fix NUMA configuration issue

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There is a NUMA memory configuration issue in 2.6.24:

A 2-node machine of ours has got the following memory layout:

Node 0:	0 - 2 Gbytes
Node 0:	4 - 8 Gbytes
Node 1:	8 - 16 Gbytes
Node 0:	16 - 18 Gbytes

"efi_memmap_init()" merges the three last ranges into one.

"register_active_ranges()" is called as follows:

efi_memmap_walk(register_active_ranges, NULL);

i.e. once for the 4 - 18 Gbytes range. It picks up the node
number from the start address, and registers all the memory for
the node #0.

"register_active_ranges()" should be called as follows to
make sure there is no merged address range at its entry:

efi_memmap_walk(filter_memory, register_active_ranges);

"filter_memory()" is similar to "filter_rsvd_memory()",
but the reserved memory ranges are not filtered out.

Signed-off-by: Zoltan Menyhart <Zoltan.Menyhart@bull.net>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Zoltan Menyhart
2008-04-11 15:21:35 -07:00
committed by Tony Luck
parent c19b2930df
commit 98075d245a
5 changed files with 29 additions and 7 deletions
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2
arch/ia64/mm/discontig.c
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@@ -444,7 +444,7 @@ void __init find_memory(void)
mem_data[node].min_pfn = ~0UL;
}
efi_memmap_walk(register_active_ranges, NULL);
efi_memmap_walk(filter_memory, register_active_ranges);
/*
* Initialize the boot memory maps in reverse order since that's