9032160275
In order to be able to suppress the use of SRAT tables that 32-bit Linux can't deal with (in one case known to lead to a non-bootable system, unless disabling ACPI altogether), move the "numa=" option handling to common code. Signed-off-by: Jan Beulich <jbeulich@novell.com> Reviewed-by: Thomas Renninger <trenn@suse.de> Cc: Tejun Heo <tj@kernel.org> Cc: Thomas Renninger <trenn@suse.de> LKML-Reference: <4D36B581020000780002D0FF@vpn.id2.novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/* Common code for 32 and 64-bit NUMA */
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#include <linux/topology.h>
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#include <linux/module.h>
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#include <linux/bootmem.h>
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#include <asm/numa.h>
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#include <asm/acpi.h>
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int __initdata numa_off;
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static __init int numa_setup(char *opt)
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{
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if (!opt)
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return -EINVAL;
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if (!strncmp(opt, "off", 3))
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numa_off = 1;
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#ifdef CONFIG_NUMA_EMU
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if (!strncmp(opt, "fake=", 5))
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numa_emu_cmdline(opt + 5);
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#endif
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#ifdef CONFIG_ACPI_NUMA
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if (!strncmp(opt, "noacpi", 6))
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acpi_numa = -1;
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#endif
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return 0;
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}
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early_param("numa", numa_setup);
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/*
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* Which logical CPUs are on which nodes
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*/
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cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
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EXPORT_SYMBOL(node_to_cpumask_map);
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/*
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* Allocate node_to_cpumask_map based on number of available nodes
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* Requires node_possible_map to be valid.
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*
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* Note: node_to_cpumask() is not valid until after this is done.
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* (Use CONFIG_DEBUG_PER_CPU_MAPS to check this.)
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*/
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void __init setup_node_to_cpumask_map(void)
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{
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unsigned int node, num = 0;
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/* setup nr_node_ids if not done yet */
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if (nr_node_ids == MAX_NUMNODES) {
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for_each_node_mask(node, node_possible_map)
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num = node;
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nr_node_ids = num + 1;
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}
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/* allocate the map */
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for (node = 0; node < nr_node_ids; node++)
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alloc_bootmem_cpumask_var(&node_to_cpumask_map[node]);
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/* cpumask_of_node() will now work */
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pr_debug("Node to cpumask map for %d nodes\n", nr_node_ids);
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}
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#ifdef CONFIG_DEBUG_PER_CPU_MAPS
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/*
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* Returns a pointer to the bitmask of CPUs on Node 'node'.
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*/
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const struct cpumask *cpumask_of_node(int node)
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{
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if (node >= nr_node_ids) {
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printk(KERN_WARNING
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"cpumask_of_node(%d): node > nr_node_ids(%d)\n",
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node, nr_node_ids);
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dump_stack();
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return cpu_none_mask;
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}
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if (node_to_cpumask_map[node] == NULL) {
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printk(KERN_WARNING
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"cpumask_of_node(%d): no node_to_cpumask_map!\n",
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node);
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dump_stack();
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return cpu_online_mask;
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}
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return node_to_cpumask_map[node];
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}
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EXPORT_SYMBOL(cpumask_of_node);
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#endif
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