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authorMinoru Usui <usui@mxm.nes.nec.co.jp>2008-01-30 07:33:35 -0500
committerIngo Molnar <mingo@elte.hu>2008-01-30 07:33:35 -0500
commit9a1b62fe858ba6780a9aeb4ab5f7751038a6c15d (patch)
tree127603cfdbb2a200d8dd2b86ddff16ec3a0484b9
parent53391fa20cab6df6b476a5a0ad6be653c9de0c46 (diff)
x86: fix NUMA emulation on 64-bit
I found a small bug of NUMA emulation code for x86_64. (CONFIG_NUMA_EMU) If machine is non-NUMA, find_node_by_addr() should return NUMA_NO_NODE, but current implementation code returns existent maximum NUMA node number + 1. This is not existent NUMA node number. However, this behaviour does not affect NUMA emulation fortunately, because acpi_fake_nodes() that is caller of find_node_by_addr() gets pxm (proximity domain) by node_to_pxm() from non-existent NUMA node number that was returned by find_node_by_addr(). node_to_pxm() returns PXM_INVAL that means illegal or non-existent NUMA node number. Signed-off-by: Minoru Usui <usui@mxm.nes.nec.co.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--arch/x86/mm/srat_64.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 4aed38fa4a65..37308d6bb5d9 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -416,7 +416,7 @@ static int __init find_node_by_addr(unsigned long addr)
416 break; 416 break;
417 } 417 }
418 } 418 }
419 return i; 419 return ret;
420} 420}
421 421
422/* 422/*