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Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Fix hotplug hang sched: Restore printk sanity
This commit is contained in:
Linus Torvalds
commit
1814f2da5e
@ -26,8 +26,6 @@
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* Thomas Gleixner, Mike Kravetz
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/nmi.h>
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@ -2348,7 +2346,7 @@ int select_task_rq(struct task_struct *p, int sd_flags, int wake_flags)
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* not worry about this generic constraint ]
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*/
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if (unlikely(!cpumask_test_cpu(cpu, &p->cpus_allowed) ||
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!cpu_active(cpu)))
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!cpu_online(cpu)))
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cpu = select_fallback_rq(task_cpu(p), p);
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return cpu;
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@ -5375,8 +5373,8 @@ static noinline void __schedule_bug(struct task_struct *prev)
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{
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struct pt_regs *regs = get_irq_regs();
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pr_err("BUG: scheduling while atomic: %s/%d/0x%08x\n",
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prev->comm, prev->pid, preempt_count());
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printk(KERN_ERR "BUG: scheduling while atomic: %s/%d/0x%08x\n",
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prev->comm, prev->pid, preempt_count());
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debug_show_held_locks(prev);
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print_modules();
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@ -6940,23 +6938,23 @@ void sched_show_task(struct task_struct *p)
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unsigned state;
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state = p->state ? __ffs(p->state) + 1 : 0;
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pr_info("%-13.13s %c", p->comm,
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printk(KERN_INFO "%-13.13s %c", p->comm,
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state < sizeof(stat_nam) - 1 ? stat_nam[state] : '?');
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#if BITS_PER_LONG == 32
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if (state == TASK_RUNNING)
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pr_cont(" running ");
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printk(KERN_CONT " running ");
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else
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pr_cont(" %08lx ", thread_saved_pc(p));
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printk(KERN_CONT " %08lx ", thread_saved_pc(p));
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#else
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if (state == TASK_RUNNING)
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pr_cont(" running task ");
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printk(KERN_CONT " running task ");
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else
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pr_cont(" %016lx ", thread_saved_pc(p));
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printk(KERN_CONT " %016lx ", thread_saved_pc(p));
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#endif
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#ifdef CONFIG_DEBUG_STACK_USAGE
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free = stack_not_used(p);
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#endif
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pr_cont("%5lu %5d %6d 0x%08lx\n", free,
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printk(KERN_CONT "%5lu %5d %6d 0x%08lx\n", free,
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task_pid_nr(p), task_pid_nr(p->real_parent),
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(unsigned long)task_thread_info(p)->flags);
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@ -6968,9 +6966,11 @@ void show_state_filter(unsigned long state_filter)
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struct task_struct *g, *p;
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#if BITS_PER_LONG == 32
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pr_info(" task PC stack pid father\n");
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printk(KERN_INFO
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" task PC stack pid father\n");
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#else
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pr_info(" task PC stack pid father\n");
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printk(KERN_INFO
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" task PC stack pid father\n");
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#endif
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read_lock(&tasklist_lock);
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do_each_thread(g, p) {
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@ -7828,44 +7828,48 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
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printk(KERN_DEBUG "%*s domain %d: ", level, "", level);
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if (!(sd->flags & SD_LOAD_BALANCE)) {
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pr_cont("does not load-balance\n");
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printk("does not load-balance\n");
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if (sd->parent)
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pr_err("ERROR: !SD_LOAD_BALANCE domain has parent\n");
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printk(KERN_ERR "ERROR: !SD_LOAD_BALANCE domain"
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" has parent");
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return -1;
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}
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pr_cont("span %s level %s\n", str, sd->name);
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printk(KERN_CONT "span %s level %s\n", str, sd->name);
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if (!cpumask_test_cpu(cpu, sched_domain_span(sd))) {
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pr_err("ERROR: domain->span does not contain CPU%d\n", cpu);
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printk(KERN_ERR "ERROR: domain->span does not contain "
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"CPU%d\n", cpu);
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}
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if (!cpumask_test_cpu(cpu, sched_group_cpus(group))) {
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pr_err("ERROR: domain->groups does not contain CPU%d\n", cpu);
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printk(KERN_ERR "ERROR: domain->groups does not contain"
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" CPU%d\n", cpu);
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}
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printk(KERN_DEBUG "%*s groups:", level + 1, "");
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do {
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if (!group) {
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pr_cont("\n");
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pr_err("ERROR: group is NULL\n");
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printk("\n");
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printk(KERN_ERR "ERROR: group is NULL\n");
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break;
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}
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if (!group->cpu_power) {
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pr_cont("\n");
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pr_err("ERROR: domain->cpu_power not set\n");
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printk(KERN_CONT "\n");
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printk(KERN_ERR "ERROR: domain->cpu_power not "
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"set\n");
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break;
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}
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if (!cpumask_weight(sched_group_cpus(group))) {
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pr_cont("\n");
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pr_err("ERROR: empty group\n");
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printk(KERN_CONT "\n");
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printk(KERN_ERR "ERROR: empty group\n");
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break;
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}
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if (cpumask_intersects(groupmask, sched_group_cpus(group))) {
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pr_cont("\n");
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pr_err("ERROR: repeated CPUs\n");
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printk(KERN_CONT "\n");
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printk(KERN_ERR "ERROR: repeated CPUs\n");
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break;
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}
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@ -7873,21 +7877,23 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
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cpulist_scnprintf(str, sizeof(str), sched_group_cpus(group));
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pr_cont(" %s", str);
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printk(KERN_CONT " %s", str);
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if (group->cpu_power != SCHED_LOAD_SCALE) {
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pr_cont(" (cpu_power = %d)", group->cpu_power);
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printk(KERN_CONT " (cpu_power = %d)",
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group->cpu_power);
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}
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group = group->next;
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} while (group != sd->groups);
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pr_cont("\n");
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printk(KERN_CONT "\n");
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if (!cpumask_equal(sched_domain_span(sd), groupmask))
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pr_err("ERROR: groups don't span domain->span\n");
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printk(KERN_ERR "ERROR: groups don't span domain->span\n");
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if (sd->parent &&
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!cpumask_subset(groupmask, sched_domain_span(sd->parent)))
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pr_err("ERROR: parent span is not a superset of domain->span\n");
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printk(KERN_ERR "ERROR: parent span is not a superset "
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"of domain->span\n");
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return 0;
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}
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@ -8443,7 +8449,8 @@ static int build_numa_sched_groups(struct s_data *d,
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sg = kmalloc_node(sizeof(struct sched_group) + cpumask_size(),
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GFP_KERNEL, num);
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if (!sg) {
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pr_warning("Can not alloc domain group for node %d\n", num);
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printk(KERN_WARNING "Can not alloc domain group for node %d\n",
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num);
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return -ENOMEM;
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}
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d->sched_group_nodes[num] = sg;
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@ -8472,8 +8479,8 @@ static int build_numa_sched_groups(struct s_data *d,
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sg = kmalloc_node(sizeof(struct sched_group) + cpumask_size(),
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GFP_KERNEL, num);
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if (!sg) {
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pr_warning("Can not alloc domain group for node %d\n",
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j);
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printk(KERN_WARNING
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"Can not alloc domain group for node %d\n", j);
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return -ENOMEM;
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}
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sg->cpu_power = 0;
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@ -8701,7 +8708,7 @@ static enum s_alloc __visit_domain_allocation_hell(struct s_data *d,
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d->sched_group_nodes = kcalloc(nr_node_ids,
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sizeof(struct sched_group *), GFP_KERNEL);
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if (!d->sched_group_nodes) {
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pr_warning("Can not alloc sched group node list\n");
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printk(KERN_WARNING "Can not alloc sched group node list\n");
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return sa_notcovered;
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}
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sched_group_nodes_bycpu[cpumask_first(cpu_map)] = d->sched_group_nodes;
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@ -8718,7 +8725,7 @@ static enum s_alloc __visit_domain_allocation_hell(struct s_data *d,
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return sa_send_covered;
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d->rd = alloc_rootdomain();
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if (!d->rd) {
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pr_warning("Cannot alloc root domain\n");
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printk(KERN_WARNING "Cannot alloc root domain\n");
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return sa_tmpmask;
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}
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return sa_rootdomain;
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@ -9700,11 +9707,13 @@ void __might_sleep(char *file, int line, int preempt_offset)
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return;
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prev_jiffy = jiffies;
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pr_err("BUG: sleeping function called from invalid context at %s:%d\n",
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file, line);
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pr_err("in_atomic(): %d, irqs_disabled(): %d, pid: %d, name: %s\n",
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in_atomic(), irqs_disabled(),
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current->pid, current->comm);
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printk(KERN_ERR
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"BUG: sleeping function called from invalid context at %s:%d\n",
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file, line);
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printk(KERN_ERR
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"in_atomic(): %d, irqs_disabled(): %d, pid: %d, name: %s\n",
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in_atomic(), irqs_disabled(),
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current->pid, current->comm);
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debug_show_held_locks(current);
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if (irqs_disabled())
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@ -35,7 +35,7 @@ static void
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dequeue_task_idle(struct rq *rq, struct task_struct *p, int sleep)
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{
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raw_spin_unlock_irq(&rq->lock);
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pr_err("bad: scheduling from the idle thread!\n");
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printk(KERN_ERR "bad: scheduling from the idle thread!\n");
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dump_stack();
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raw_spin_lock_irq(&rq->lock);
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}
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