sched: Make nr_running() return 32-bit value

Creating 2**32 tasks is impossible due to futex pid limits and wasteful
anyway. Nobody has done it.

Bring nr_running() into 32-bit world to save on REX prefixes.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210422200228.1423391-1-adobriyan@gmail.com

diff --git a/fs/proc/loadavg.c b/fs/proc/loadavg.c
index 8468bae..f32878d 100644 (file)
--- a/fs/proc/loadavg.c
+++ b/fs/proc/loadavg.c
@@ -16,7 +16,7 @@ static int loadavg_proc_show(struct seq_file *m, void *v)
 
        get_avenrun(avnrun, FIXED_1/200, 0);
 
-       seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %ld/%d %d\n",
+       seq_printf(m, "%lu.%02lu %lu.%02lu %lu.%02lu %u/%d %d\n",
                LOAD_INT(avnrun[0]), LOAD_FRAC(avnrun[0]),
                LOAD_INT(avnrun[1]), LOAD_FRAC(avnrun[1]),
                LOAD_INT(avnrun[2]), LOAD_FRAC(avnrun[2]),

diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index f25e853..941605d 100644 (file)
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -200,7 +200,7 @@ static int show_stat(struct seq_file *p, void *v)
                "\nctxt %llu\n"
                "btime %llu\n"
                "processes %lu\n"
-               "procs_running %lu\n"
+               "procs_running %u\n"
                "procs_blocked %lu\n",
                nr_context_switches(),
                (unsigned long long)boottime.tv_sec,

diff --git a/include/linux/sched/stat.h b/include/linux/sched/stat.h
index 939c3ec..73606b3 100644 (file)
--- a/include/linux/sched/stat.h
+++ b/include/linux/sched/stat.h
@@ -17,7 +17,7 @@ extern unsigned long total_forks;
 extern int nr_threads;
 DECLARE_PER_CPU(unsigned long, process_counts);
 extern int nr_processes(void);
-extern unsigned long nr_running(void);
+extern unsigned int nr_running(void);
 extern bool single_task_running(void);
 extern unsigned long nr_iowait(void);
 extern unsigned long nr_iowait_cpu(int cpu);

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index ac8882d..2c6cdb0 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4692,9 +4692,9 @@ context_switch(struct rq *rq, struct task_struct *prev,
  * externally visible scheduler statistics: current number of runnable
  * threads, total number of context switches performed since bootup.
  */
-unsigned long nr_running(void)
+unsigned int nr_running(void)
 {
-       unsigned long i, sum = 0;
+       unsigned int i, sum = 0;
 
        for_each_online_cpu(i)
                sum += cpu_rq(i)->nr_running;