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cpuset: convert cpuset->cpus_allowed to cpumask_var_t
Impact: use new cpumask API This patch mainly does the following things: - change cs->cpus_allowed from cpumask_t to cpumask_var_t - call alloc_bootmem_cpumask_var() for top_cpuset in cpuset_init_early() - call alloc_cpumask_var() for other cpusets - replace cpus_xxx() to cpumask_xxx() Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Mike Travis <travis@sgi.com> Cc: Paul Menage <menage@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Li Zefan
Linus Torvalds
parent
645fcc9d2f
commit
300ed6cbb7
1 changed files with 60 additions and 40 deletions
100
kernel/cpuset.c
100
kernel/cpuset.c
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@ -84,7 +84,7 @@ struct cpuset {
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struct cgroup_subsys_state css;
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unsigned long flags; /* "unsigned long" so bitops work */
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cpumask_t cpus_allowed; /* CPUs allowed to tasks in cpuset */
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cpumask_var_t cpus_allowed; /* CPUs allowed to tasks in cpuset */
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nodemask_t mems_allowed; /* Memory Nodes allowed to tasks */
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struct cpuset *parent; /* my parent */
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@ -195,8 +195,6 @@ static int cpuset_mems_generation;
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static struct cpuset top_cpuset = {
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.flags = ((1 << CS_CPU_EXCLUSIVE) | (1 << CS_MEM_EXCLUSIVE)),
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.cpus_allowed = CPU_MASK_ALL,
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.mems_allowed = NODE_MASK_ALL,
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};
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/*
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@ -278,7 +276,7 @@ static struct file_system_type cpuset_fs_type = {
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};
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/*
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* Return in *pmask the portion of a cpusets's cpus_allowed that
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* Return in pmask the portion of a cpusets's cpus_allowed that
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* are online. If none are online, walk up the cpuset hierarchy
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* until we find one that does have some online cpus. If we get
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* all the way to the top and still haven't found any online cpus,
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@ -293,13 +291,13 @@ static struct file_system_type cpuset_fs_type = {
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static void guarantee_online_cpus(const struct cpuset *cs, cpumask_t *pmask)
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{
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while (cs && !cpus_intersects(cs->cpus_allowed, cpu_online_map))
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while (cs && !cpumask_intersects(cs->cpus_allowed, cpu_online_mask))
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cs = cs->parent;
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if (cs)
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cpus_and(*pmask, cs->cpus_allowed, cpu_online_map);
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cpumask_and(pmask, cs->cpus_allowed, cpu_online_mask);
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else
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*pmask = cpu_online_map;
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BUG_ON(!cpus_intersects(*pmask, cpu_online_map));
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cpumask_copy(pmask, cpu_online_mask);
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BUG_ON(!cpumask_intersects(pmask, cpu_online_mask));
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}
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/*
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@ -409,7 +407,7 @@ void cpuset_update_task_memory_state(void)
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static int is_cpuset_subset(const struct cpuset *p, const struct cpuset *q)
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{
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return cpus_subset(p->cpus_allowed, q->cpus_allowed) &&
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return cpumask_subset(p->cpus_allowed, q->cpus_allowed) &&
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nodes_subset(p->mems_allowed, q->mems_allowed) &&
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is_cpu_exclusive(p) <= is_cpu_exclusive(q) &&
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is_mem_exclusive(p) <= is_mem_exclusive(q);
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@ -421,7 +419,19 @@ static int is_cpuset_subset(const struct cpuset *p, const struct cpuset *q)
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*/
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static struct cpuset *alloc_trial_cpuset(const struct cpuset *cs)
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{
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return kmemdup(cs, sizeof(*cs), GFP_KERNEL);
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struct cpuset *trial;
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trial = kmemdup(cs, sizeof(*cs), GFP_KERNEL);
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if (!trial)
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return NULL;
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if (!alloc_cpumask_var(&trial->cpus_allowed, GFP_KERNEL)) {
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kfree(trial);
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return NULL;
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}
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cpumask_copy(trial->cpus_allowed, cs->cpus_allowed);
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return trial;
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}
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/**
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@ -430,6 +440,7 @@ static struct cpuset *alloc_trial_cpuset(const struct cpuset *cs)
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*/
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static void free_trial_cpuset(struct cpuset *trial)
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{
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free_cpumask_var(trial->cpus_allowed);
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kfree(trial);
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}
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@ -482,7 +493,7 @@ static int validate_change(const struct cpuset *cur, const struct cpuset *trial)
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c = cgroup_cs(cont);
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if ((is_cpu_exclusive(trial) || is_cpu_exclusive(c)) &&
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c != cur &&
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cpus_intersects(trial->cpus_allowed, c->cpus_allowed))
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cpumask_intersects(trial->cpus_allowed, c->cpus_allowed))
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return -EINVAL;
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if ((is_mem_exclusive(trial) || is_mem_exclusive(c)) &&
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c != cur &&
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@ -492,7 +503,7 @@ static int validate_change(const struct cpuset *cur, const struct cpuset *trial)
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/* Cpusets with tasks can't have empty cpus_allowed or mems_allowed */
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if (cgroup_task_count(cur->css.cgroup)) {
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if (cpus_empty(trial->cpus_allowed) ||
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if (cpumask_empty(trial->cpus_allowed) ||
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nodes_empty(trial->mems_allowed)) {
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return -ENOSPC;
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}
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@ -507,7 +518,7 @@ static int validate_change(const struct cpuset *cur, const struct cpuset *trial)
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*/
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static int cpusets_overlap(struct cpuset *a, struct cpuset *b)
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{
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return cpus_intersects(a->cpus_allowed, b->cpus_allowed);
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return cpumask_intersects(a->cpus_allowed, b->cpus_allowed);
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}
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static void
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@ -532,7 +543,7 @@ update_domain_attr_tree(struct sched_domain_attr *dattr, struct cpuset *c)
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cp = list_first_entry(&q, struct cpuset, stack_list);
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list_del(q.next);
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if (cpus_empty(cp->cpus_allowed))
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if (cpumask_empty(cp->cpus_allowed))
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continue;
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if (is_sched_load_balance(cp))
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@ -627,7 +638,7 @@ static int generate_sched_domains(cpumask_t **domains,
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*dattr = SD_ATTR_INIT;
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update_domain_attr_tree(dattr, &top_cpuset);
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}
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*doms = top_cpuset.cpus_allowed;
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cpumask_copy(doms, top_cpuset.cpus_allowed);
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ndoms = 1;
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goto done;
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@ -646,7 +657,7 @@ static int generate_sched_domains(cpumask_t **domains,
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cp = list_first_entry(&q, struct cpuset, stack_list);
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list_del(q.next);
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if (cpus_empty(cp->cpus_allowed))
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if (cpumask_empty(cp->cpus_allowed))
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continue;
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/*
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@ -739,7 +750,7 @@ restart:
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struct cpuset *b = csa[j];
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if (apn == b->pn) {
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cpus_or(*dp, *dp, b->cpus_allowed);
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cpumask_or(dp, dp, b->cpus_allowed);
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if (dattr)
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update_domain_attr_tree(dattr + nslot, b);
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@ -848,7 +859,7 @@ void rebuild_sched_domains(void)
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static int cpuset_test_cpumask(struct task_struct *tsk,
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struct cgroup_scanner *scan)
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{
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return !cpus_equal(tsk->cpus_allowed,
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return !cpumask_equal(&tsk->cpus_allowed,
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(cgroup_cs(scan->cg))->cpus_allowed);
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}
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@ -866,7 +877,7 @@ static int cpuset_test_cpumask(struct task_struct *tsk,
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static void cpuset_change_cpumask(struct task_struct *tsk,
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struct cgroup_scanner *scan)
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{
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set_cpus_allowed_ptr(tsk, &((cgroup_cs(scan->cg))->cpus_allowed));
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set_cpus_allowed_ptr(tsk, ((cgroup_cs(scan->cg))->cpus_allowed));
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}
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/**
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@ -916,13 +927,13 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
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* with tasks have cpus.
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*/
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if (!*buf) {
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cpus_clear(trialcs->cpus_allowed);
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cpumask_clear(trialcs->cpus_allowed);
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} else {
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retval = cpulist_parse(buf, &trialcs->cpus_allowed);
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retval = cpulist_parse(buf, trialcs->cpus_allowed);
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if (retval < 0)
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return retval;
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if (!cpus_subset(trialcs->cpus_allowed, cpu_online_map))
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if (!cpumask_subset(trialcs->cpus_allowed, cpu_online_mask))
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return -EINVAL;
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}
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retval = validate_change(cs, trialcs);
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@ -930,7 +941,7 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
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return retval;
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/* Nothing to do if the cpus didn't change */
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if (cpus_equal(cs->cpus_allowed, trialcs->cpus_allowed))
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if (cpumask_equal(cs->cpus_allowed, trialcs->cpus_allowed))
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return 0;
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retval = heap_init(&heap, PAGE_SIZE, GFP_KERNEL, NULL);
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@ -940,7 +951,7 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
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is_load_balanced = is_sched_load_balance(trialcs);
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mutex_lock(&callback_mutex);
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cs->cpus_allowed = trialcs->cpus_allowed;
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cpumask_copy(cs->cpus_allowed, trialcs->cpus_allowed);
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mutex_unlock(&callback_mutex);
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/*
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@ -1028,7 +1039,7 @@ static int update_tasks_nodemask(struct cpuset *cs, const nodemask_t *oldmem)
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cpuset_being_rebound = cs; /* causes mpol_dup() rebind */
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fudge = 10; /* spare mmarray[] slots */
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fudge += cpus_weight(cs->cpus_allowed); /* imagine one fork-bomb/cpu */
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fudge += cpumask_weight(cs->cpus_allowed);/* imagine 1 fork-bomb/cpu */
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retval = -ENOMEM;
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/*
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@ -1176,7 +1187,8 @@ static int update_relax_domain_level(struct cpuset *cs, s64 val)
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if (val != cs->relax_domain_level) {
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cs->relax_domain_level = val;
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if (!cpus_empty(cs->cpus_allowed) && is_sched_load_balance(cs))
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if (!cpumask_empty(cs->cpus_allowed) &&
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is_sched_load_balance(cs))
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async_rebuild_sched_domains();
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}
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@ -1219,7 +1231,7 @@ static int update_flag(cpuset_flagbits_t bit, struct cpuset *cs,
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cs->flags = trialcs->flags;
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mutex_unlock(&callback_mutex);
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if (!cpus_empty(trialcs->cpus_allowed) && balance_flag_changed)
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if (!cpumask_empty(trialcs->cpus_allowed) && balance_flag_changed)
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async_rebuild_sched_domains();
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out:
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@ -1335,12 +1347,12 @@ static int cpuset_can_attach(struct cgroup_subsys *ss,
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struct cpuset *cs = cgroup_cs(cont);
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int ret = 0;
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if (cpus_empty(cs->cpus_allowed) || nodes_empty(cs->mems_allowed))
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if (cpumask_empty(cs->cpus_allowed) || nodes_empty(cs->mems_allowed))
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return -ENOSPC;
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if (tsk->flags & PF_THREAD_BOUND) {
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mutex_lock(&callback_mutex);
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if (!cpus_equal(tsk->cpus_allowed, cs->cpus_allowed))
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if (!cpumask_equal(&tsk->cpus_allowed, cs->cpus_allowed))
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ret = -EINVAL;
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mutex_unlock(&callback_mutex);
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}
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@ -1516,7 +1528,7 @@ static int cpuset_sprintf_cpulist(char *page, struct cpuset *cs)
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int ret;
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mutex_lock(&callback_mutex);
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ret = cpulist_scnprintf(page, PAGE_SIZE, &cs->cpus_allowed);
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ret = cpulist_scnprintf(page, PAGE_SIZE, cs->cpus_allowed);
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mutex_unlock(&callback_mutex);
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return ret;
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@ -1755,7 +1767,7 @@ static void cpuset_post_clone(struct cgroup_subsys *ss,
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parent_cs = cgroup_cs(parent);
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cs->mems_allowed = parent_cs->mems_allowed;
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cs->cpus_allowed = parent_cs->cpus_allowed;
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cpumask_copy(cs->cpus_allowed, parent_cs->cpus_allowed);
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return;
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}
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@ -1781,6 +1793,10 @@ static struct cgroup_subsys_state *cpuset_create(
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cs = kmalloc(sizeof(*cs), GFP_KERNEL);
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if (!cs)
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return ERR_PTR(-ENOMEM);
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if (!alloc_cpumask_var(&cs->cpus_allowed, GFP_KERNEL)) {
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kfree(cs);
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return ERR_PTR(-ENOMEM);
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}
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cpuset_update_task_memory_state();
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cs->flags = 0;
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@ -1789,7 +1805,7 @@ static struct cgroup_subsys_state *cpuset_create(
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if (is_spread_slab(parent))
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set_bit(CS_SPREAD_SLAB, &cs->flags);
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set_bit(CS_SCHED_LOAD_BALANCE, &cs->flags);
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cpus_clear(cs->cpus_allowed);
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cpumask_clear(cs->cpus_allowed);
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nodes_clear(cs->mems_allowed);
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cs->mems_generation = cpuset_mems_generation++;
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fmeter_init(&cs->fmeter);
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@ -1816,6 +1832,7 @@ static void cpuset_destroy(struct cgroup_subsys *ss, struct cgroup *cont)
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update_flag(CS_SCHED_LOAD_BALANCE, cs, 0);
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number_of_cpusets--;
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free_cpumask_var(cs->cpus_allowed);
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kfree(cs);
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}
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@ -1839,6 +1856,8 @@ struct cgroup_subsys cpuset_subsys = {
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int __init cpuset_init_early(void)
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{
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alloc_bootmem_cpumask_var(&top_cpuset.cpus_allowed);
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top_cpuset.mems_generation = cpuset_mems_generation++;
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return 0;
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}
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@ -1854,7 +1873,7 @@ int __init cpuset_init(void)
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{
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int err = 0;
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cpus_setall(top_cpuset.cpus_allowed);
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cpumask_setall(top_cpuset.cpus_allowed);
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nodes_setall(top_cpuset.mems_allowed);
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fmeter_init(&top_cpuset.fmeter);
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@ -1943,7 +1962,7 @@ static void remove_tasks_in_empty_cpuset(struct cpuset *cs)
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* has online cpus, so can't be empty).
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*/
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parent = cs->parent;
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while (cpus_empty(parent->cpus_allowed) ||
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while (cpumask_empty(parent->cpus_allowed) ||
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nodes_empty(parent->mems_allowed))
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parent = parent->parent;
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@ -1984,7 +2003,7 @@ static void scan_for_empty_cpusets(struct cpuset *root)
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}
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/* Continue past cpusets with all cpus, mems online */
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if (cpus_subset(cp->cpus_allowed, cpu_online_map) &&
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if (cpumask_subset(cp->cpus_allowed, cpu_online_mask) &&
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nodes_subset(cp->mems_allowed, node_states[N_HIGH_MEMORY]))
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continue;
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@ -1992,13 +2011,14 @@ static void scan_for_empty_cpusets(struct cpuset *root)
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/* Remove offline cpus and mems from this cpuset. */
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mutex_lock(&callback_mutex);
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cpus_and(cp->cpus_allowed, cp->cpus_allowed, cpu_online_map);
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cpumask_and(cp->cpus_allowed, cp->cpus_allowed,
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cpu_online_mask);
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nodes_and(cp->mems_allowed, cp->mems_allowed,
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node_states[N_HIGH_MEMORY]);
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mutex_unlock(&callback_mutex);
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/* Move tasks from the empty cpuset to a parent */
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if (cpus_empty(cp->cpus_allowed) ||
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if (cpumask_empty(cp->cpus_allowed) ||
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nodes_empty(cp->mems_allowed))
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remove_tasks_in_empty_cpuset(cp);
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else {
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@ -2039,7 +2059,7 @@ static int cpuset_track_online_cpus(struct notifier_block *unused_nb,
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}
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cgroup_lock();
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top_cpuset.cpus_allowed = cpu_online_map;
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cpumask_copy(top_cpuset.cpus_allowed, cpu_online_mask);
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scan_for_empty_cpusets(&top_cpuset);
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ndoms = generate_sched_domains(&doms, &attr);
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cgroup_unlock();
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@ -2084,7 +2104,7 @@ static int cpuset_track_online_nodes(struct notifier_block *self,
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void __init cpuset_init_smp(void)
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{
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top_cpuset.cpus_allowed = cpu_online_map;
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cpumask_copy(top_cpuset.cpus_allowed, cpu_online_mask);
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top_cpuset.mems_allowed = node_states[N_HIGH_MEMORY];
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hotcpu_notifier(cpuset_track_online_cpus, 0);
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@ -2096,7 +2116,7 @@ void __init cpuset_init_smp(void)
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* @tsk: pointer to task_struct from which to obtain cpuset->cpus_allowed.
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* @pmask: pointer to cpumask_t variable to receive cpus_allowed set.
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*
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* Description: Returns the cpumask_t cpus_allowed of the cpuset
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* Description: Returns the cpumask_var_t cpus_allowed of the cpuset
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* attached to the specified @tsk. Guaranteed to return some non-empty
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* subset of cpu_online_map, even if this means going outside the
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* tasks cpuset.
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