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sched: Make nr_iowait() return 32-bit value

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

Return "unsigned int" and 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/20210422200228.1423391-2-adobriyan@gmail.com
This commit is contained in:
Alexey Dobriyan 2021-04-22 23:02:26 +03:00 committed by Ingo Molnar
parent 01aee8fd7f
commit 9745516841
3 changed files with 4 additions and 4 deletions
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2
fs/proc/stat.c
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@ -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,

2
include/linux/sched/stat.h
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@ -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)

4
kernel/sched/core.c
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@ -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);