From: Alexey Dobriyan <adobriyan@gmail.com>
To: mingo@redhat.com, peterz@infradead.org
Cc: linux-kernel@vger.kernel.org, Alexey Dobriyan <adobriyan@gmail.com>
Subject: [PATCH 1/4] sched: make nr_running() return 32-bit
Date: Thu, 22 Apr 2021 23:02:25 +0300 [thread overview]
Message-ID: <20210422200228.1423391-1-adobriyan@gmail.com> (raw)
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>
---
fs/proc/loadavg.c | 2 +-
fs/proc/stat.c | 2 +-
include/linux/sched/stat.h | 2 +-
kernel/sched/core.c | 4 ++--
4 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/fs/proc/loadavg.c b/fs/proc/loadavg.c
index 8468baee951d..f32878d9a39f 100644
--- 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 f25e8531fd27..941605de7f9a 100644
--- 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 568286411b43..f742229091ec 100644
--- a/include/linux/sched/stat.h
+++ b/include/linux/sched/stat.h
@@ -16,7 +16,7 @@ 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 98191218d891..713ea35cb995 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4331,9 +4331,9 @@ 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;
--
2.30.2
next reply other threads:[~2021-04-22 20:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-22 20:02 Alexey Dobriyan [this message]
2021-04-22 20:02 ` [PATCH 2/4] sched: make nr_iowait() return 32-bit value Alexey Dobriyan
2021-05-12 20:01 ` [tip: sched/core] sched: Make " tip-bot2 for Alexey Dobriyan
2021-04-22 20:02 ` [PATCH 3/4] sched: make nr_iowait_cpu() return 32-bit Alexey Dobriyan
2021-05-12 20:01 ` [tip: sched/core] sched: Make nr_iowait_cpu() return 32-bit value tip-bot2 for Alexey Dobriyan
2021-04-22 20:02 ` [PATCH 4/4] sched: make multiple runqueue task counters 32-bit Alexey Dobriyan
2021-05-12 19:36 ` Ingo Molnar
2021-05-12 20:01 ` [tip: sched/core] sched: Make " tip-bot2 for Alexey Dobriyan
2021-05-12 20:01 ` [tip: sched/core] sched: Make nr_running() return 32-bit value tip-bot2 for Alexey Dobriyan
2021-05-12 23:58 ` [PATCH 1/4] sched: make nr_running() return 32-bit Thomas Gleixner
2021-05-13 7:23 ` Alexey Dobriyan
2021-05-13 9:58 ` Ingo Molnar
2021-05-13 21:22 ` Alexey Dobriyan
2021-05-14 12:52 ` Thomas Gleixner
2021-05-14 18:18 ` Thomas Gleixner
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