AcoSail/kernel_optimize_test
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[PATCH] x86-64: set node_possible_map at runtime - try 2

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Set the node_possible_map at runtime on x86_64.  On a non NUMA system,
num_possible_nodes() will now say '1'.

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
This commit is contained in:
Suresh Siddha 2007-05-02 19:27:20 +02:00 committed by Andi Kleen
parent 8a336b0a4b
commit e3f1caeef9
3 changed files with 15 additions and 10 deletions
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7
arch/x86_64/mm/k8topology.c
View File

@ -49,11 +49,8 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
int found = 0;
u32 reg;
unsigned numnodes;
nodemask_t nodes_parsed;
unsigned dualcore = 0;
nodes_clear(nodes_parsed);
if (!early_pci_allowed())
return -1;
@ -102,7 +99,7 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
nodeid, (base>>8)&3, (limit>>8) & 3);
return -1;
}
if (node_isset(nodeid, nodes_parsed)) {
if (node_isset(nodeid, node_possible_map)) {
printk(KERN_INFO "Node %d already present. Skipping\n",
nodeid);
continue;
@ -155,7 +152,7 @@ int __init k8_scan_nodes(unsigned long start, unsigned long end)
prevbase = base;
node_set(nodeid, nodes_parsed);
node_set(nodeid, node_possible_map);
}
if (!found)

10
arch/x86_64/mm/numa.c
View File

@ -295,7 +295,7 @@ static int __init setup_node_range(int nid, struct bootnode *nodes, u64 *addr,
ret = -1;
}
nodes[nid].end = *addr;
node_set_online(nid);
node_set(nid, node_possible_map);
printk(KERN_INFO "Faking node %d at %016Lx-%016Lx (%LuMB)\n", nid,
nodes[nid].start, nodes[nid].end,
(nodes[nid].end - nodes[nid].start) >> 20);
@ -479,7 +479,7 @@ static int __init numa_emulation(unsigned long start_pfn, unsigned long end_pfn)
* SRAT.
*/
remove_all_active_ranges();
for_each_online_node(i) {
for_each_node_mask(i, node_possible_map) {
e820_register_active_regions(i, nodes[i].start >> PAGE_SHIFT,
nodes[i].end >> PAGE_SHIFT);
setup_node_bootmem(i, nodes[i].start, nodes[i].end);
@ -494,20 +494,25 @@ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
{
int i;
nodes_clear(node_possible_map);
#ifdef CONFIG_NUMA_EMU
if (cmdline && !numa_emulation(start_pfn, end_pfn))
return;
nodes_clear(node_possible_map);
#endif
#ifdef CONFIG_ACPI_NUMA
if (!numa_off && !acpi_scan_nodes(start_pfn << PAGE_SHIFT,
end_pfn << PAGE_SHIFT))
return;
nodes_clear(node_possible_map);
#endif
#ifdef CONFIG_K8_NUMA
if (!numa_off && !k8_scan_nodes(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT))
return;
nodes_clear(node_possible_map);
#endif
printk(KERN_INFO "%s\n",
numa_off ? "NUMA turned off" : "No NUMA configuration found");
@ -521,6 +526,7 @@ void __init numa_initmem_init(unsigned long start_pfn, unsigned long end_pfn)
memnodemap[0] = 0;
nodes_clear(node_online_map);
node_set_online(0);
node_set(0, node_possible_map);
for (i = 0; i < NR_CPUS; i++)
numa_set_node(i, 0);
node_to_cpumask[0] = cpumask_of_cpu(0);

8
arch/x86_64/mm/srat.c
View File

@ -419,19 +419,21 @@ int __init acpi_scan_nodes(unsigned long start, unsigned long end)
return -1;
}
node_possible_map = nodes_parsed;
/* Finally register nodes */
for_each_node_mask(i, nodes_parsed)
for_each_node_mask(i, node_possible_map)
setup_node_bootmem(i, nodes[i].start, nodes[i].end);
/* Try again in case setup_node_bootmem missed one due
to missing bootmem */
for_each_node_mask(i, nodes_parsed)
for_each_node_mask(i, node_possible_map)
if (!node_online(i))
setup_node_bootmem(i, nodes[i].start, nodes[i].end);
for (i = 0; i < NR_CPUS; i++) {
if (cpu_to_node[i] == NUMA_NO_NODE)
continue;
if (!node_isset(cpu_to_node[i], nodes_parsed))
if (!node_isset(cpu_to_node[i], node_possible_map))
numa_set_node(i, NUMA_NO_NODE);
}
numa_init_array();