diff options
| author | Tejun Heo <tj@kernel.org> | 2011-01-23 14:37:39 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-01-28 14:54:09 +0100 |
| commit | bbc9e2f452d9c4b166d1f9a78d941d80173312fe (patch) | |
| tree | d75d41187b296235f833e942ed8c1dd938a7bae4 /arch/x86/mm/srat_64.c | |
| parent | 89e5dc218e084e13a3996db6693b01478912f4ee (diff) | |
x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit
The mapping between cpu/apicid and node is done via
apicid_to_node[] on 64bit and apicid_2_node[] +
apic->x86_32_numa_cpu_node() on 32bit. This difference makes it
difficult to further unify 32 and 64bit NUMA handling.
This patch unifies it by replacing both apicid_to_node[] and
apicid_2_node[] with __apicid_to_node[] array, which is accessed
by two accessors - set_apicid_to_node() and numa_cpu_node(). On
64bit, numa_cpu_node() always consults __apicid_to_node[]
directly while 32bit goes through apic->numa_cpu_node() method
to allow apic implementations to override it.
srat_detect_node() for amd cpus contains workaround for broken
NUMA configuration which assumes relationship between APIC ID,
HT node ID and NUMA topology. Leave it to access
__apicid_to_node[] directly as mapping through CPU might result
in undesirable behavior change. The comment is reformatted and
updated to note the ugliness.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <1295789862-25482-14-git-send-email-tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: David Rientjes <rientjes@google.com>
Diffstat (limited to 'arch/x86/mm/srat_64.c')
| -rw-r--r-- | arch/x86/mm/srat_64.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c index 603d285d1daa..9a97261a2418 100644 --- a/arch/x86/mm/srat_64.c +++ b/arch/x86/mm/srat_64.c @@ -79,7 +79,7 @@ static __init void bad_srat(void) printk(KERN_ERR "SRAT: SRAT not used.\n"); acpi_numa = -1; for (i = 0; i < MAX_LOCAL_APIC; i++) - apicid_to_node[i] = NUMA_NO_NODE; + set_apicid_to_node(i, NUMA_NO_NODE); for (i = 0; i < MAX_NUMNODES; i++) { nodes[i].start = nodes[i].end = 0; nodes_add[i].start = nodes_add[i].end = 0; @@ -138,7 +138,7 @@ acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa) printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u skipped apicid that is too big\n", pxm, apic_id, node); return; } - apicid_to_node[apic_id] = node; + set_apicid_to_node(apic_id, node); node_set(node, cpu_nodes_parsed); acpi_numa = 1; printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%04x -> Node %u\n", @@ -178,7 +178,7 @@ acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa) return; } - apicid_to_node[apic_id] = node; + set_apicid_to_node(apic_id, node); node_set(node, cpu_nodes_parsed); acpi_numa = 1; printk(KERN_INFO "SRAT: PXM %u -> APIC 0x%02x -> Node %u\n", @@ -521,7 +521,7 @@ void __init acpi_fake_nodes(const struct bootnode *fake_nodes, int num_nodes) * node, it must now point to the fake node ID. */ for (j = 0; j < MAX_LOCAL_APIC; j++) - if (apicid_to_node[j] == nid && + if (__apicid_to_node[j] == nid && fake_apicid_to_node[j] == NUMA_NO_NODE) fake_apicid_to_node[j] = i; } @@ -532,13 +532,13 @@ void __init acpi_fake_nodes(const struct bootnode *fake_nodes, int num_nodes) * value. */ for (i = 0; i < MAX_LOCAL_APIC; i++) - if (apicid_to_node[i] != NUMA_NO_NODE && + if (__apicid_to_node[i] != NUMA_NO_NODE && fake_apicid_to_node[i] == NUMA_NO_NODE) fake_apicid_to_node[i] = 0; for (i = 0; i < num_nodes; i++) __acpi_map_pxm_to_node(fake_node_to_pxm_map[i], i); - memcpy(apicid_to_node, fake_apicid_to_node, sizeof(apicid_to_node)); + memcpy(__apicid_to_node, fake_apicid_to_node, sizeof(__apicid_to_node)); nodes_clear(nodes_parsed); for (i = 0; i < num_nodes; i++) |