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| author | David Rientjes <rientjes@google.com> | 2010-03-26 00:33:04 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-04-04 06:50:01 +0200 |
| commit | 0f9b75ef3722814134f307f51c19e0791da40e69 (patch) | |
| tree | c3d559132032330519f9ea9c81762becc1def9e6 /drivers/acpi | |
| parent | Linux 2.6.34-rc3 (diff) | |
| download | linux-0f9b75ef3722814134f307f51c19e0791da40e69.tar.xz linux-0f9b75ef3722814134f307f51c19e0791da40e69.zip | |
ACPI: NUMA: map pxms to low node ids
pxms are mapped to low node ids to maintain generic kernel use of
functions such as pxm_to_node() that are used to determine device
affinity. Otherwise, there is no pxm-to-node and node-to-pxm matching
rule for x86_64 users of NUMA emulation where a single pxm may be bound
to multiple NUMA nodes.
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/numa.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c index b8725461d887..b0337d314604 100644 --- a/drivers/acpi/numa.c +++ b/drivers/acpi/numa.c @@ -61,8 +61,10 @@ int node_to_pxm(int node) void __acpi_map_pxm_to_node(int pxm, int node) { - pxm_to_node_map[pxm] = node; - node_to_pxm_map[node] = pxm; + if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm]) + pxm_to_node_map[pxm] = node; + if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node]) + node_to_pxm_map[node] = pxm; } int acpi_map_pxm_to_node(int pxm) |