The patch titled
x86_64: Handle empty node zero
has been added to the -mm tree. Its filename is
x86_64-handle-empty-node-zero.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: x86_64: Handle empty node zero
From: Daniel Yeisley <dan.yeisley@xxxxxxxxxx>
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 <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/x86_64/kernel/pci-dma.c | 4 ++++
arch/x86_64/kernel/setup.c | 2 +-
arch/x86_64/mm/srat.c | 4 +++-
3 files changed, 8 insertions(+), 2 deletions(-)
diff -puN arch/x86_64/kernel/pci-dma.c~x86_64-handle-empty-node-zero arch/x86_64/kernel/pci-dma.c
--- devel/arch/x86_64/kernel/pci-dma.c~x86_64-handle-empty-node-zero 2006-05-29 14:16:22.000000000 -0700
+++ devel-akpm/arch/x86_64/kernel/pci-dma.c 2006-05-29 14:16:22.000000000 -0700
@@ -54,6 +54,10 @@ dma_alloc_pages(struct device *dev, gfp_
else
#endif
node = numa_node_id();
+
+ if (node < first_node(node_online_map))
+ node = first_node(node_online_map);
+
page = alloc_pages_node(node, gfp, order);
return page ? page_address(page) : NULL;
}
diff -puN arch/x86_64/kernel/setup.c~x86_64-handle-empty-node-zero arch/x86_64/kernel/setup.c
--- devel/arch/x86_64/kernel/setup.c~x86_64-handle-empty-node-zero 2006-05-29 14:16:22.000000000 -0700
+++ devel-akpm/arch/x86_64/kernel/setup.c 2006-05-29 14:16:22.000000000 -0700
@@ -1051,7 +1051,7 @@ static void srat_detect_node(void)
for now. */
node = apicid_to_node[hard_smp_processor_id()];
if (node == NUMA_NO_NODE)
- node = 0;
+ node = first_node(node_online_map);
numa_set_node(cpu, node);
if (acpi_numa > 0)
diff -puN arch/x86_64/mm/srat.c~x86_64-handle-empty-node-zero arch/x86_64/mm/srat.c
--- devel/arch/x86_64/mm/srat.c~x86_64-handle-empty-node-zero 2006-05-29 14:16:22.000000000 -0700
+++ devel-akpm/arch/x86_64/mm/srat.c 2006-05-29 14:16:22.000000000 -0700
@@ -399,8 +399,10 @@ int __init acpi_scan_nodes(unsigned long
/* 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)
_
Patches currently in -mm which might be from dan.yeisley@xxxxxxxxxx are
x86_64-handle-empty-node-zero.patch
-
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