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Merge branch 'for-4.17/dax' into libnvdimm-for-next
[linux-block.git] / kernel / sched / debug.c
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 1ca0130ed4f937d8b1abcc0e64fd14ebb3a3cfb7..99e825b76633b0118979cf9ce86fbfcfbb270004 100644 (file)
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -1,7 +1,7 @@
 /*
  * kernel/sched/debug.c
  *
- * Print the CFS rbtree
+ * Print the CFS rbtree and other debugging details
  *
  * Copyright(C) 2007, Red Hat, Inc., Ingo Molnar
  *
@@ -9,16 +9,6 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-
-#include <linux/proc_fs.h>
-#include <linux/sched/mm.h>
-#include <linux/sched/task.h>
-#include <linux/seq_file.h>
-#include <linux/kallsyms.h>
-#include <linux/utsname.h>
-#include <linux/mempolicy.h>
-#include <linux/debugfs.h>
-
 #include "sched.h"
 
 static DEFINE_SPINLOCK(sched_debug_lock);
@@ -32,7 +22,7 @@ static DEFINE_SPINLOCK(sched_debug_lock);
        if (m)                                  \
                seq_printf(m, x);               \
        else                                    \
-               printk(x);                      \
+               pr_cont(x);                     \
  } while (0)
 
 /*
@@ -274,34 +264,19 @@ sd_alloc_ctl_domain_table(struct sched_domain *sd)
        if (table == NULL)
                return NULL;
 
-       set_table_entry(&table[0], "min_interval", &sd->min_interval,
-               sizeof(long), 0644, proc_doulongvec_minmax, false);
-       set_table_entry(&table[1], "max_interval", &sd->max_interval,
-               sizeof(long), 0644, proc_doulongvec_minmax, false);
-       set_table_entry(&table[2], "busy_idx", &sd->busy_idx,
-               sizeof(int), 0644, proc_dointvec_minmax, true);
-       set_table_entry(&table[3], "idle_idx", &sd->idle_idx,
-               sizeof(int), 0644, proc_dointvec_minmax, true);
-       set_table_entry(&table[4], "newidle_idx", &sd->newidle_idx,
-               sizeof(int), 0644, proc_dointvec_minmax, true);
-       set_table_entry(&table[5], "wake_idx", &sd->wake_idx,
-               sizeof(int), 0644, proc_dointvec_minmax, true);
-       set_table_entry(&table[6], "forkexec_idx", &sd->forkexec_idx,
-               sizeof(int), 0644, proc_dointvec_minmax, true);
-       set_table_entry(&table[7], "busy_factor", &sd->busy_factor,
-               sizeof(int), 0644, proc_dointvec_minmax, false);
-       set_table_entry(&table[8], "imbalance_pct", &sd->imbalance_pct,
-               sizeof(int), 0644, proc_dointvec_minmax, false);
-       set_table_entry(&table[9], "cache_nice_tries",
-               &sd->cache_nice_tries,
-               sizeof(int), 0644, proc_dointvec_minmax, false);
-       set_table_entry(&table[10], "flags", &sd->flags,
-               sizeof(int), 0644, proc_dointvec_minmax, false);
-       set_table_entry(&table[11], "max_newidle_lb_cost",
-               &sd->max_newidle_lb_cost,
-               sizeof(long), 0644, proc_doulongvec_minmax, false);
-       set_table_entry(&table[12], "name", sd->name,
-               CORENAME_MAX_SIZE, 0444, proc_dostring, false);
+       set_table_entry(&table[0] , "min_interval",        &sd->min_interval,        sizeof(long), 0644, proc_doulongvec_minmax, false);
+       set_table_entry(&table[1] , "max_interval",        &sd->max_interval,        sizeof(long), 0644, proc_doulongvec_minmax, false);
+       set_table_entry(&table[2] , "busy_idx",            &sd->busy_idx,            sizeof(int) , 0644, proc_dointvec_minmax,   true );
+       set_table_entry(&table[3] , "idle_idx",            &sd->idle_idx,            sizeof(int) , 0644, proc_dointvec_minmax,   true );
+       set_table_entry(&table[4] , "newidle_idx",         &sd->newidle_idx,         sizeof(int) , 0644, proc_dointvec_minmax,   true );
+       set_table_entry(&table[5] , "wake_idx",            &sd->wake_idx,            sizeof(int) , 0644, proc_dointvec_minmax,   true );
+       set_table_entry(&table[6] , "forkexec_idx",        &sd->forkexec_idx,        sizeof(int) , 0644, proc_dointvec_minmax,   true );
+       set_table_entry(&table[7] , "busy_factor",         &sd->busy_factor,         sizeof(int) , 0644, proc_dointvec_minmax,   false);
+       set_table_entry(&table[8] , "imbalance_pct",       &sd->imbalance_pct,       sizeof(int) , 0644, proc_dointvec_minmax,   false);
+       set_table_entry(&table[9] , "cache_nice_tries",    &sd->cache_nice_tries,    sizeof(int) , 0644, proc_dointvec_minmax,   false);
+       set_table_entry(&table[10], "flags",               &sd->flags,               sizeof(int) , 0644, proc_dointvec_minmax,   false);
+       set_table_entry(&table[11], "max_newidle_lb_cost", &sd->max_newidle_lb_cost, sizeof(long), 0644, proc_doulongvec_minmax, false);
+       set_table_entry(&table[12], "name",                sd->name,            CORENAME_MAX_SIZE, 0444, proc_dostring,          false);
        /* &table[13] is terminator */
 
        return table;
@@ -332,8 +307,8 @@ static struct ctl_table *sd_alloc_ctl_cpu_table(int cpu)
        return table;
 }
 
-static cpumask_var_t sd_sysctl_cpus;
-static struct ctl_table_header *sd_sysctl_header;
+static cpumask_var_t           sd_sysctl_cpus;
+static struct ctl_table_header *sd_sysctl_header;
 
 void register_sched_domain_sysctl(void)
 {
@@ -413,14 +388,10 @@ static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group
 {
        struct sched_entity *se = tg->se[cpu];
 
-#define P(F) \
-       SEQ_printf(m, "  .%-30s: %lld\n", #F, (long long)F)
-#define P_SCHEDSTAT(F) \
-       SEQ_printf(m, "  .%-30s: %lld\n", #F, (long long)schedstat_val(F))
-#define PN(F) \
-       SEQ_printf(m, "  .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
-#define PN_SCHEDSTAT(F) \
-       SEQ_printf(m, "  .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)schedstat_val(F)))
+#define P(F)           SEQ_printf(m, "  .%-30s: %lld\n",       #F, (long long)F)
+#define P_SCHEDSTAT(F) SEQ_printf(m, "  .%-30s: %lld\n",       #F, (long long)schedstat_val(F))
+#define PN(F)          SEQ_printf(m, "  .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)F))
+#define PN_SCHEDSTAT(F)        SEQ_printf(m, "  .%-30s: %lld.%06ld\n", #F, SPLIT_NS((long long)schedstat_val(F)))
 
        if (!se)
                return;
@@ -428,6 +399,7 @@ static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group
        PN(se->exec_start);
        PN(se->vruntime);
        PN(se->sum_exec_runtime);
+
        if (schedstat_enabled()) {
                PN_SCHEDSTAT(se->statistics.wait_start);
                PN_SCHEDSTAT(se->statistics.sleep_start);
@@ -440,6 +412,7 @@ static void print_cfs_group_stats(struct seq_file *m, int cpu, struct task_group
                PN_SCHEDSTAT(se->statistics.wait_sum);
                P_SCHEDSTAT(se->statistics.wait_count);
        }
+
        P(se->load.weight);
        P(se->runnable_weight);
 #ifdef CONFIG_SMP
@@ -464,6 +437,7 @@ static char *task_group_path(struct task_group *tg)
                return group_path;
 
        cgroup_path(tg->css.cgroup, group_path, PATH_MAX);
+
        return group_path;
 }
 #endif
@@ -501,12 +475,12 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
 {
        struct task_struct *g, *p;
 
-       SEQ_printf(m,
-       "\nrunnable tasks:\n"
-       " S           task   PID         tree-key  switches  prio"
-       "     wait-time             sum-exec        sum-sleep\n"
-       "-------------------------------------------------------"
-       "----------------------------------------------------\n");
+       SEQ_printf(m, "\n");
+       SEQ_printf(m, "runnable tasks:\n");
+       SEQ_printf(m, " S           task   PID         tree-key  switches  prio"
+                  "     wait-time             sum-exec        sum-sleep\n");
+       SEQ_printf(m, "-------------------------------------------------------"
+                  "----------------------------------------------------\n");
 
        rcu_read_lock();
        for_each_process_thread(g, p) {
@@ -527,9 +501,11 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
        unsigned long flags;
 
 #ifdef CONFIG_FAIR_GROUP_SCHED
-       SEQ_printf(m, "\ncfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
+       SEQ_printf(m, "\n");
+       SEQ_printf(m, "cfs_rq[%d]:%s\n", cpu, task_group_path(cfs_rq->tg));
 #else
-       SEQ_printf(m, "\ncfs_rq[%d]:\n", cpu);
+       SEQ_printf(m, "\n");
+       SEQ_printf(m, "cfs_rq[%d]:\n", cpu);
 #endif
        SEQ_printf(m, "  .%-30s: %Ld.%06ld\n", "exec_clock",
                        SPLIT_NS(cfs_rq->exec_clock));
@@ -595,9 +571,11 @@ void print_cfs_rq(struct seq_file *m, int cpu, struct cfs_rq *cfs_rq)
 void print_rt_rq(struct seq_file *m, int cpu, struct rt_rq *rt_rq)
 {
 #ifdef CONFIG_RT_GROUP_SCHED
-       SEQ_printf(m, "\nrt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
+       SEQ_printf(m, "\n");
+       SEQ_printf(m, "rt_rq[%d]:%s\n", cpu, task_group_path(rt_rq->tg));
 #else
-       SEQ_printf(m, "\nrt_rq[%d]:\n", cpu);
+       SEQ_printf(m, "\n");
+       SEQ_printf(m, "rt_rq[%d]:\n", cpu);
 #endif
 
 #define P(x) \
@@ -624,7 +602,8 @@ void print_dl_rq(struct seq_file *m, int cpu, struct dl_rq *dl_rq)
 {
        struct dl_bw *dl_bw;
 
-       SEQ_printf(m, "\ndl_rq[%d]:\n", cpu);
+       SEQ_printf(m, "\n");
+       SEQ_printf(m, "dl_rq[%d]:\n", cpu);
 
 #define PU(x) \
        SEQ_printf(m, "  .%-30s: %lu\n", #x, (unsigned long)(dl_rq->x))
@@ -799,9 +778,9 @@ void sysrq_sched_debug_show(void)
 /*
  * This itererator needs some explanation.
  * It returns 1 for the header position.
- * This means 2 is cpu 0.
- * In a hotplugged system some cpus, including cpu 0, may be missing so we have
- * to use cpumask_* to iterate over the cpus.
+ * This means 2 is CPU 0.
+ * In a hotplugged system some CPUs, including CPU 0, may be missing so we have
+ * to use cpumask_* to iterate over the CPUs.
  */
 static void *sched_debug_start(struct seq_file *file, loff_t *offset)
 {
@@ -821,6 +800,7 @@ static void *sched_debug_start(struct seq_file *file, loff_t *offset)
 
        if (n < nr_cpu_ids)
                return (void *)(unsigned long)(n + 2);
+
        return NULL;
 }
 
@@ -835,10 +815,10 @@ static void sched_debug_stop(struct seq_file *file, void *data)
 }
 
 static const struct seq_operations sched_debug_sops = {
-       .start = sched_debug_start,
-       .next = sched_debug_next,
-       .stop = sched_debug_stop,
-       .show = sched_debug_show,
+       .start          = sched_debug_start,
+       .next           = sched_debug_next,
+       .stop           = sched_debug_stop,
+       .show           = sched_debug_show,
 };
 
 static int sched_debug_release(struct inode *inode, struct file *file)
@@ -876,14 +856,10 @@ static int __init init_sched_debug_procfs(void)
 
 __initcall(init_sched_debug_procfs);
 
-#define __P(F) \
-       SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
-#define P(F) \
-       SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
-#define __PN(F) \
-       SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
-#define PN(F) \
-       SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
+#define __P(F) SEQ_printf(m, "%-45s:%21Ld\n",       #F, (long long)F)
+#define   P(F) SEQ_printf(m, "%-45s:%21Ld\n",       #F, (long long)p->F)
+#define __PN(F)        SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
+#define   PN(F)        SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
 
 
 #ifdef CONFIG_NUMA_BALANCING
Linux 6.x block layer and io_uring tree(s)