diff options
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 39 |
1 files changed, 27 insertions, 12 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 3399701c680e..f385eff4682d 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -34,7 +34,7 @@ #include <linux/security.h> #include <linux/notifier.h> #include <linux/profile.h> -#include <linux/suspend.h> +#include <linux/freezer.h> #include <linux/vmalloc.h> #include <linux/blkdev.h> #include <linux/delay.h> @@ -505,7 +505,7 @@ static int schedstat_open(struct inode *inode, struct file *file) return res; } -struct file_operations proc_schedstat_operations = { +const struct file_operations proc_schedstat_operations = { .open = schedstat_open, .read = seq_read, .llseek = seq_lseek, @@ -948,6 +948,17 @@ static void activate_task(struct task_struct *p, struct rq *rq, int local) } #endif + /* + * Sleep time is in units of nanosecs, so shift by 20 to get a + * milliseconds-range estimation of the amount of time that the task + * spent sleeping: + */ + if (unlikely(prof_on == SLEEP_PROFILING)) { + if (p->state == TASK_UNINTERRUPTIBLE) + profile_hits(SLEEP_PROFILING, (void *)get_wchan(p), + (now - p->timestamp) >> 20); + } + if (!rt_task(p)) p->prio = recalc_task_prio(p, now); @@ -3333,6 +3344,7 @@ asmlinkage void __sched schedule(void) printk(KERN_ERR "BUG: scheduling while atomic: " "%s/0x%08x/%d\n", current->comm, preempt_count(), current->pid); + debug_show_held_locks(current); dump_stack(); } profile_hit(SCHED_PROFILING, __builtin_return_address(0)); @@ -4804,18 +4816,18 @@ static void show_task(struct task_struct *p) show_stack(p, NULL); } -void show_state(void) +void show_state_filter(unsigned long state_filter) { struct task_struct *g, *p; #if (BITS_PER_LONG == 32) printk("\n" - " sibling\n"); - printk(" task PC pid father child younger older\n"); + " free sibling\n"); + printk(" task PC stack pid father child younger older\n"); #else printk("\n" - " sibling\n"); - printk(" task PC pid father child younger older\n"); + " free sibling\n"); + printk(" task PC stack pid father child younger older\n"); #endif read_lock(&tasklist_lock); do_each_thread(g, p) { @@ -4824,11 +4836,16 @@ void show_state(void) * console might take alot of time: */ touch_nmi_watchdog(); - show_task(p); + if (p->state & state_filter) + show_task(p); } while_each_thread(g, p); read_unlock(&tasklist_lock); - debug_show_all_locks(); + /* + * Only show locks if all tasks are dumped: + */ + if (state_filter == -1) + debug_show_all_locks(); } /** @@ -6723,8 +6740,6 @@ SYSDEV_ATTR(sched_smt_power_savings, 0644, sched_smt_power_savings_show, sched_smt_power_savings_store); #endif - -#ifdef CONFIG_HOTPLUG_CPU /* * Force a reinitialization of the sched domains hierarchy. The domains * and groups cannot be updated in place without racing with the balancing @@ -6757,7 +6772,6 @@ static int update_sched_domains(struct notifier_block *nfb, return NOTIFY_OK; } -#endif void __init sched_init_smp(void) { @@ -6867,6 +6881,7 @@ void __might_sleep(char *file, int line) " context at %s:%d\n", file, line); printk("in_atomic():%d, irqs_disabled():%d\n", in_atomic(), irqs_disabled()); + debug_show_held_locks(current); dump_stack(); } #endif |