From 0d01532451710110a93891ae152d1dd1ee006ccf Mon Sep 17 00:00:00 2001 From: Daniel Yeisley Date: Tue, 30 May 2006 22:47:57 +0200 Subject: [PATCH] x86_64: Handle empty node zero From: Daniel Yeisley It is possible to boot a Unisys ES7000 with CPUs from multiple cells, and not also include the memory from those cells. This can create a scenario where node 0 has cpus, but no associated memory. The system will boot fine in a configuration where node 0 has memory, but nodes 2 and 3 do not. [AK: I rechecked the code and generic code seems to indeed handle that already. Dan's original patch had a change for mm/slab.c that seems to be already in now.] Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/x86_64/mm/srat.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/x86_64/mm/srat.c') diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c index e1513532df29..474df22c6ed2 100644 --- a/arch/x86_64/mm/srat.c +++ b/arch/x86_64/mm/srat.c @@ -399,8 +399,10 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end) /* First clean up the node list */ for (i = 0; i < MAX_NUMNODES; i++) { cutoff_node(i, start, end); - if ((nodes[i].end - nodes[i].start) < NODE_MIN_SIZE) + if ((nodes[i].end - nodes[i].start) < NODE_MIN_SIZE) { unparse_node(i); + node_set_offline(i); + } } if (acpi_numa <= 0) -- cgit v1.2.3