Le mercredi 08 décembre 2010 à 05:33 +0100, Eric Dumazet a écrit :
> By the way, anybody knows how I can emulate a memoryless node on a dual
> node x86_64 machine (with memory present on both nodes) ?
>
>
this hack works for me :
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index a35cb9d..1087333 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -261,6 +261,7 @@ acpi_numa_memory_affinity_init(struct
acpi_srat_mem_affinity *ma)
end = start + ma->length;
pxm = ma->proximity_domain;
node = setup_node(pxm);
+ node = 0;
if (node < 0) {
printk(KERN_ERR "SRAT: Too many proximity domains.\n");
bad_srat();
[ 0.000000] SRAT: PXM 0 -> APIC 0x00 -> Node 0
[ 0.000000] SRAT: PXM 0 -> APIC 0x01 -> Node 0
[ 0.000000] SRAT: PXM 0 -> APIC 0x02 -> Node 0
[ 0.000000] SRAT: PXM 0 -> APIC 0x03 -> Node 0
[ 0.000000] SRAT: PXM 0 -> APIC 0x04 -> Node 0
[ 0.000000] SRAT: PXM 0 -> APIC 0x05 -> Node 0
[ 0.000000] SRAT: PXM 0 -> APIC 0x06 -> Node 0
[ 0.000000] SRAT: PXM 0 -> APIC 0x07 -> Node 0
[ 0.000000] SRAT: PXM 1 -> APIC 0x10 -> Node 1
[ 0.000000] SRAT: PXM 1 -> APIC 0x11 -> Node 1
[ 0.000000] SRAT: PXM 1 -> APIC 0x12 -> Node 1
[ 0.000000] SRAT: PXM 1 -> APIC 0x13 -> Node 1
[ 0.000000] SRAT: PXM 1 -> APIC 0x14 -> Node 1
[ 0.000000] SRAT: PXM 1 -> APIC 0x15 -> Node 1
[ 0.000000] SRAT: PXM 1 -> APIC 0x16 -> Node 1
[ 0.000000] SRAT: PXM 1 -> APIC 0x17 -> Node 1
[ 0.000000] SRAT: Node 0 PXM 0 0-80000000
[ 0.000000] SRAT: Node 0 PXM 1 80000000-e0000000
[ 0.000000] SRAT: Node 0 PXM 1 100000000-120000000
[ 0.000000] SRAT: Node 0 [0,80000000) + [80000000,e0000000) -> [0,e0000000)
[ 0.000000] SRAT: Node 0 [0,e0000000) + [100000000,120000000) ->
[0,120000000)
[ 0.000000] NUMA: Using 63 for the hash shift.
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