Messages in this thread Patch in this message | | | Date | Sat, 6 Feb 2021 18:22:29 +0300 | From | Alexey Dobriyan <> | Subject | [PATCH 3/5] 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> ---
fs/proc/stat.c | 2 +- include/linux/sched/stat.h | 2 +- kernel/sched/core.c | 4 ++-- 3 files changed, 4 insertions(+), 4 deletions(-)
--- a/fs/proc/stat.c +++ b/fs/proc/stat.c @@ -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, --- a/include/linux/sched/stat.h +++ b/include/linux/sched/stat.h @@ -18,7 +18,7 @@ DECLARE_PER_CPU(unsigned long, process_counts); extern int nr_processes(void); unsigned int nr_running(void); extern bool single_task_running(void); -extern unsigned long nr_iowait(void); +unsigned int nr_iowait(void); extern unsigned long nr_iowait_cpu(int cpu); static inline int sched_info_on(void) --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4418,9 +4418,9 @@ 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);
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