Commit 97455168 authored by Alexey Dobriyan's avatar Alexey Dobriyan Committed by Ingo Molnar
Browse files

sched: Make nr_iowait() return 32-bit value 



Creating 2**32 tasks to wait in D-state is impossible and wasteful.

Return "unsigned int" and save on REX prefixes.

Signed-off-by: default avatarAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210422200228.1423391-2-adobriyan@gmail.com
parent 01aee8fd

fs/proc/stat.c

+1 −1
Original line number Diff line number Diff line
@@ -201,7 +201,7 @@ static int show_stat(struct seq_file *p, void *v) 
		"btime %llu\n"

		"processes %lu\n"

		"procs_running %u\n"

		"procs_blocked %lu\n",

		"procs_blocked %u\n",

		nr_context_switches(),

		(unsigned long long)boottime.tv_sec,

		total_forks,

include/linux/sched/stat.h

+1 −1
Original line number Diff line number Diff line
@@ -19,7 +19,7 @@ DECLARE_PER_CPU(unsigned long, process_counts); 
extern int nr_processes(void);

extern unsigned int nr_running(void);

extern bool single_task_running(void);

extern unsigned long nr_iowait(void);

extern unsigned int nr_iowait(void);

extern unsigned long nr_iowait_cpu(int cpu);



static inline int sched_info_on(void)

kernel/sched/core.c

+2 −2
Original line number Diff line number Diff line
@@ -4774,9 +4774,9 @@ unsigned long nr_iowait_cpu(int cpu) 
 * Task CPU affinities can make all that even more 'interesting'.

 */



unsigned long nr_iowait(void)

unsigned int nr_iowait(void)

{

	unsigned long i, sum = 0;

	unsigned int i, sum = 0;



	for_each_possible_cpu(i)

		sum += nr_iowait_cpu(i);