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authorJohn Hawkes <hawkes@sgi.com>2005-09-06 15:18:14 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-07 16:57:40 -0700
commit9c1cfda20a508b181bdda8c0045f7c0c333880a5 (patch)
treeeaa5b7ef7407316c36def26169574d0e37b1e60a /arch
parentef08e3b4981aebf2ba9bd7025ef7210e8eec07ce (diff)
downloadlinux-sh-9c1cfda20a508b181bdda8c0045f7c0c333880a5.tar.gz
[PATCH] cpusets: Move the ia64 domain setup code to the generic code
Signed-off-by: John Hawkes <hawkes@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/ia64/kernel/Makefile2
-rw-r--r--arch/ia64/kernel/domain.c444
2 files changed, 1 insertions, 445 deletions
diff --git a/arch/ia64/kernel/Makefile b/arch/ia64/kernel/Makefile
index b242594be55b..307514f7a282 100644
--- a/arch/ia64/kernel/Makefile
+++ b/arch/ia64/kernel/Makefile
@@ -16,7 +16,7 @@ obj-$(CONFIG_IA64_HP_ZX1_SWIOTLB) += acpi-ext.o
obj-$(CONFIG_IA64_PALINFO) += palinfo.o
obj-$(CONFIG_IOSAPIC) += iosapic.o
obj-$(CONFIG_MODULES) += module.o
-obj-$(CONFIG_SMP) += smp.o smpboot.o domain.o
+obj-$(CONFIG_SMP) += smp.o smpboot.o
obj-$(CONFIG_NUMA) += numa.o
obj-$(CONFIG_PERFMON) += perfmon_default_smpl.o
obj-$(CONFIG_IA64_CYCLONE) += cyclone.o
diff --git a/arch/ia64/kernel/domain.c b/arch/ia64/kernel/domain.c
deleted file mode 100644
index e907109983f1..000000000000
--- a/arch/ia64/kernel/domain.c
+++ /dev/null
@@ -1,444 +0,0 @@
-/*
- * arch/ia64/kernel/domain.c
- * Architecture specific sched-domains builder.
- *
- * Copyright (C) 2004 Jesse Barnes
- * Copyright (C) 2004 Silicon Graphics, Inc.
- */
-
-#include <linux/sched.h>
-#include <linux/percpu.h>
-#include <linux/slab.h>
-#include <linux/cpumask.h>
-#include <linux/init.h>
-#include <linux/topology.h>
-#include <linux/nodemask.h>
-
-#define SD_NODES_PER_DOMAIN 16
-
-#ifdef CONFIG_NUMA
-/**
- * find_next_best_node - find the next node to include in a sched_domain
- * @node: node whose sched_domain we're building
- * @used_nodes: nodes already in the sched_domain
- *
- * Find the next node to include in a given scheduling domain. Simply
- * finds the closest node not already in the @used_nodes map.
- *
- * Should use nodemask_t.
- */
-static int find_next_best_node(int node, unsigned long *used_nodes)
-{
- int i, n, val, min_val, best_node = 0;
-
- min_val = INT_MAX;
-
- for (i = 0; i < MAX_NUMNODES; i++) {
- /* Start at @node */
- n = (node + i) % MAX_NUMNODES;
-
- if (!nr_cpus_node(n))
- continue;
-
- /* Skip already used nodes */
- if (test_bit(n, used_nodes))
- continue;
-
- /* Simple min distance search */
- val = node_distance(node, n);
-
- if (val < min_val) {
- min_val = val;
- best_node = n;
- }
- }
-
- set_bit(best_node, used_nodes);
- return best_node;
-}
-
-/**
- * sched_domain_node_span - get a cpumask for a node's sched_domain
- * @node: node whose cpumask we're constructing
- * @size: number of nodes to include in this span
- *
- * Given a node, construct a good cpumask for its sched_domain to span. It
- * should be one that prevents unnecessary balancing, but also spreads tasks
- * out optimally.
- */
-static cpumask_t sched_domain_node_span(int node)
-{
- int i;
- cpumask_t span, nodemask;
- DECLARE_BITMAP(used_nodes, MAX_NUMNODES);
-
- cpus_clear(span);
- bitmap_zero(used_nodes, MAX_NUMNODES);
-
- nodemask = node_to_cpumask(node);
- cpus_or(span, span, nodemask);
- set_bit(node, used_nodes);
-
- for (i = 1; i < SD_NODES_PER_DOMAIN; i++) {
- int next_node = find_next_best_node(node, used_nodes);
- nodemask = node_to_cpumask(next_node);
- cpus_or(span, span, nodemask);
- }
-
- return span;
-}
-#endif
-
-/*
- * At the moment, CONFIG_SCHED_SMT is never defined, but leave it in so we
- * can switch it on easily if needed.
- */
-#ifdef CONFIG_SCHED_SMT
-static DEFINE_PER_CPU(struct sched_domain, cpu_domains);
-static struct sched_group sched_group_cpus[NR_CPUS];
-static int cpu_to_cpu_group(int cpu)
-{
- return cpu;
-}
-#endif
-
-static DEFINE_PER_CPU(struct sched_domain, phys_domains);
-static struct sched_group sched_group_phys[NR_CPUS];
-static int cpu_to_phys_group(int cpu)
-{
-#ifdef CONFIG_SCHED_SMT
- return first_cpu(cpu_sibling_map[cpu]);
-#else
- return cpu;
-#endif
-}
-
-#ifdef CONFIG_NUMA
-/*
- * The init_sched_build_groups can't handle what we want to do with node
- * groups, so roll our own. Now each node has its own list of groups which
- * gets dynamically allocated.
- */
-static DEFINE_PER_CPU(struct sched_domain, node_domains);
-static struct sched_group **sched_group_nodes_bycpu[NR_CPUS];
-
-static DEFINE_PER_CPU(struct sched_domain, allnodes_domains);
-static struct sched_group *sched_group_allnodes_bycpu[NR_CPUS];
-
-static int cpu_to_allnodes_group(int cpu)
-{
- return cpu_to_node(cpu);
-}
-#endif
-
-/*
- * Build sched domains for a given set of cpus and attach the sched domains
- * to the individual cpus
- */
-void build_sched_domains(const cpumask_t *cpu_map)
-{
- int i;
-#ifdef CONFIG_NUMA
- struct sched_group **sched_group_nodes = NULL;
- struct sched_group *sched_group_allnodes = NULL;
-
- /*
- * Allocate the per-node list of sched groups
- */
- sched_group_nodes = kmalloc(sizeof(struct sched_group*)*MAX_NUMNODES,
- GFP_ATOMIC);
- if (!sched_group_nodes) {
- printk(KERN_WARNING "Can not alloc sched group node list\n");
- return;
- }
- sched_group_nodes_bycpu[first_cpu(*cpu_map)] = sched_group_nodes;
-#endif
-
- /*
- * Set up domains for cpus specified by the cpu_map.
- */
- for_each_cpu_mask(i, *cpu_map) {
- int group;
- struct sched_domain *sd = NULL, *p;
- cpumask_t nodemask = node_to_cpumask(cpu_to_node(i));
-
- cpus_and(nodemask, nodemask, *cpu_map);
-
-#ifdef CONFIG_NUMA
- if (cpus_weight(*cpu_map)
- > SD_NODES_PER_DOMAIN*cpus_weight(nodemask)) {
- if (!sched_group_allnodes) {
- sched_group_allnodes
- = kmalloc(sizeof(struct sched_group)
- * MAX_NUMNODES,
- GFP_KERNEL);
- if (!sched_group_allnodes) {
- printk(KERN_WARNING
- "Can not alloc allnodes sched group\n");
- break;
- }
- sched_group_allnodes_bycpu[i]
- = sched_group_allnodes;
- }
- sd = &per_cpu(allnodes_domains, i);
- *sd = SD_ALLNODES_INIT;
- sd->span = *cpu_map;
- group = cpu_to_allnodes_group(i);
- sd->groups = &sched_group_allnodes[group];
- p = sd;
- } else
- p = NULL;
-
- sd = &per_cpu(node_domains, i);
- *sd = SD_NODE_INIT;
- sd->span = sched_domain_node_span(cpu_to_node(i));
- sd->parent = p;
- cpus_and(sd->span, sd->span, *cpu_map);
-#endif
-
- p = sd;
- sd = &per_cpu(phys_domains, i);
- group = cpu_to_phys_group(i);
- *sd = SD_CPU_INIT;
- sd->span = nodemask;
- sd->parent = p;
- sd->groups = &sched_group_phys[group];
-
-#ifdef CONFIG_SCHED_SMT
- p = sd;
- sd = &per_cpu(cpu_domains, i);
- group = cpu_to_cpu_group(i);
- *sd = SD_SIBLING_INIT;
- sd->span = cpu_sibling_map[i];
- cpus_and(sd->span, sd->span, *cpu_map);
- sd->parent = p;
- sd->groups = &sched_group_cpus[group];
-#endif
- }
-
-#ifdef CONFIG_SCHED_SMT
- /* Set up CPU (sibling) groups */
- for_each_cpu_mask(i, *cpu_map) {
- cpumask_t this_sibling_map = cpu_sibling_map[i];
- cpus_and(this_sibling_map, this_sibling_map, *cpu_map);
- if (i != first_cpu(this_sibling_map))
- continue;
-
- init_sched_build_groups(sched_group_cpus, this_sibling_map,
- &cpu_to_cpu_group);
- }
-#endif
-
- /* Set up physical groups */
- for (i = 0; i < MAX_NUMNODES; i++) {
- cpumask_t nodemask = node_to_cpumask(i);
-
- cpus_and(nodemask, nodemask, *cpu_map);
- if (cpus_empty(nodemask))
- continue;
-
- init_sched_build_groups(sched_group_phys, nodemask,
- &cpu_to_phys_group);
- }
-
-#ifdef CONFIG_NUMA
- if (sched_group_allnodes)
- init_sched_build_groups(sched_group_allnodes, *cpu_map,
- &cpu_to_allnodes_group);
-
- for (i = 0; i < MAX_NUMNODES; i++) {
- /* Set up node groups */
- struct sched_group *sg, *prev;
- cpumask_t nodemask = node_to_cpumask(i);
- cpumask_t domainspan;
- cpumask_t covered = CPU_MASK_NONE;
- int j;
-
- cpus_and(nodemask, nodemask, *cpu_map);
- if (cpus_empty(nodemask)) {
- sched_group_nodes[i] = NULL;
- continue;
- }
-
- domainspan = sched_domain_node_span(i);
- cpus_and(domainspan, domainspan, *cpu_map);
-
- sg = kmalloc(sizeof(struct sched_group), GFP_KERNEL);
- sched_group_nodes[i] = sg;
- for_each_cpu_mask(j, nodemask) {
- struct sched_domain *sd;
- sd = &per_cpu(node_domains, j);
- sd->groups = sg;
- if (sd->groups == NULL) {
- /* Turn off balancing if we have no groups */
- sd->flags = 0;
- }
- }
- if (!sg) {
- printk(KERN_WARNING
- "Can not alloc domain group for node %d\n", i);
- continue;
- }
- sg->cpu_power = 0;
- sg->cpumask = nodemask;
- cpus_or(covered, covered, nodemask);
- prev = sg;
-
- for (j = 0; j < MAX_NUMNODES; j++) {
- cpumask_t tmp, notcovered;
- int n = (i + j) % MAX_NUMNODES;
-
- cpus_complement(notcovered, covered);
- cpus_and(tmp, notcovered, *cpu_map);
- cpus_and(tmp, tmp, domainspan);
- if (cpus_empty(tmp))
- break;
-
- nodemask = node_to_cpumask(n);
- cpus_and(tmp, tmp, nodemask);
- if (cpus_empty(tmp))
- continue;
-
- sg = kmalloc(sizeof(struct sched_group), GFP_KERNEL);
- if (!sg) {
- printk(KERN_WARNING
- "Can not alloc domain group for node %d\n", j);
- break;
- }
- sg->cpu_power = 0;
- sg->cpumask = tmp;
- cpus_or(covered, covered, tmp);
- prev->next = sg;
- prev = sg;
- }
- prev->next = sched_group_nodes[i];
- }
-#endif
-
- /* Calculate CPU power for physical packages and nodes */
- for_each_cpu_mask(i, *cpu_map) {
- int power;
- struct sched_domain *sd;
-#ifdef CONFIG_SCHED_SMT
- sd = &per_cpu(cpu_domains, i);
- power = SCHED_LOAD_SCALE;
- sd->groups->cpu_power = power;
-#endif
-
- sd = &per_cpu(phys_domains, i);
- power = SCHED_LOAD_SCALE + SCHED_LOAD_SCALE *
- (cpus_weight(sd->groups->cpumask)-1) / 10;
- sd->groups->cpu_power = power;
-
-#ifdef CONFIG_NUMA
- sd = &per_cpu(allnodes_domains, i);
- if (sd->groups) {
- power = SCHED_LOAD_SCALE + SCHED_LOAD_SCALE *
- (cpus_weight(sd->groups->cpumask)-1) / 10;
- sd->groups->cpu_power = power;
- }
-#endif
- }
-
-#ifdef CONFIG_NUMA
- for (i = 0; i < MAX_NUMNODES; i++) {
- struct sched_group *sg = sched_group_nodes[i];
- int j;
-
- if (sg == NULL)
- continue;
-next_sg:
- for_each_cpu_mask(j, sg->cpumask) {
- struct sched_domain *sd;
- int power;
-
- sd = &per_cpu(phys_domains, j);
- if (j != first_cpu(sd->groups->cpumask)) {
- /*
- * Only add "power" once for each
- * physical package.
- */
- continue;
- }
- power = SCHED_LOAD_SCALE + SCHED_LOAD_SCALE *
- (cpus_weight(sd->groups->cpumask)-1) / 10;
-
- sg->cpu_power += power;
- }
- sg = sg->next;
- if (sg != sched_group_nodes[i])
- goto next_sg;
- }
-#endif
-
- /* Attach the domains */
- for_each_cpu_mask(i, *cpu_map) {
- struct sched_domain *sd;
-#ifdef CONFIG_SCHED_SMT
- sd = &per_cpu(cpu_domains, i);
-#else
- sd = &per_cpu(phys_domains, i);
-#endif
- cpu_attach_domain(sd, i);
- }
-}
-/*
- * Set up scheduler domains and groups. Callers must hold the hotplug lock.
- */
-void arch_init_sched_domains(const cpumask_t *cpu_map)
-{
- cpumask_t cpu_default_map;
-
- /*
- * Setup mask for cpus without special case scheduling requirements.
- * For now this just excludes isolated cpus, but could be used to
- * exclude other special cases in the future.
- */
- cpus_andnot(cpu_default_map, *cpu_map, cpu_isolated_map);
-
- build_sched_domains(&cpu_default_map);
-}
-
-void arch_destroy_sched_domains(const cpumask_t *cpu_map)
-{
-#ifdef CONFIG_NUMA
- int i;
- int cpu;
-
- for_each_cpu_mask(cpu, *cpu_map) {
- struct sched_group *sched_group_allnodes
- = sched_group_allnodes_bycpu[cpu];
- struct sched_group **sched_group_nodes
- = sched_group_nodes_bycpu[cpu];
-
- if (sched_group_allnodes) {
- kfree(sched_group_allnodes);
- sched_group_allnodes_bycpu[cpu] = NULL;
- }
-
- if (!sched_group_nodes)
- continue;
-
- for (i = 0; i < MAX_NUMNODES; i++) {
- cpumask_t nodemask = node_to_cpumask(i);
- struct sched_group *oldsg, *sg = sched_group_nodes[i];
-
- cpus_and(nodemask, nodemask, *cpu_map);
- if (cpus_empty(nodemask))
- continue;
-
- if (sg == NULL)
- continue;
- sg = sg->next;
-next_sg:
- oldsg = sg;
- sg = sg->next;
- kfree(oldsg);
- if (oldsg != sched_group_nodes[i])
- goto next_sg;
- }
- kfree(sched_group_nodes);
- sched_group_nodes_bycpu[cpu] = NULL;
- }
-#endif
-}