[PATCH 08/15] tick/sched: Remove nohz disabled special case in cputime fetch
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STALE145d
LANDED: 1 (1M)
From: Frederic Weisbecker <frederic@kernel.org>
Date: 2026-05-08 13:18:13
Also in:
linux-pm, linux-s390, lkml
Subsystem:
nohz, dynticks support, the rest · Maintainers:
Anna-Maria Behnsen, Frederic Weisbecker, Ingo Molnar, Thomas Gleixner, Linus Torvalds
Revision v4 of 4 in this series; 1 review trailer; landed in mainline as bd0c77cd46c6 on 2026-06-02.
Revisions (4)
- v1 [diff vs current]
- v2 [diff vs current]
- v3 [diff vs current]
- v4 current
Even when nohz is not runtime enabled, the dynticks idle cputime accounting can run and the common idle cputime accessors are still relevant. Remove the nohz disabled special case accordingly. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Tested-by: Shrikanth Hegde <sshegde@linux.ibm.com> --- kernel/time/tick-sched.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index c3efd3583cf9..cb235ec7d2d6 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c@@ -795,9 +795,6 @@ static u64 get_cpu_sleep_time_us(int cpu, enum cpu_usage_stat idx, ktime_t now, idle; unsigned int seq; - if (!tick_nohz_active) - return -1; - now = ktime_get(); if (last_update_time) *last_update_time = ktime_to_us(now);
@@ -839,7 +836,7 @@ static u64 get_cpu_sleep_time_us(int cpu, enum cpu_usage_stat idx, * This time is measured via accounting rather than sampling, * and is as accurate as ktime_get() is. * - * Return: -1 if NOHZ is not enabled, else total idle time of the @cpu + * Return: -1 if generic vtime is enabled, else total idle time of the @cpu */ u64 get_cpu_idle_time_us(int cpu, u64 *last_update_time) {
@@ -863,7 +860,7 @@ EXPORT_SYMBOL_GPL(get_cpu_idle_time_us); * This time is measured via accounting rather than sampling, * and is as accurate as ktime_get() is. * - * Return: -1 if NOHZ is not enabled, else total iowait time of @cpu + * Return: -1 if generic vtime is enabled, else total iowait time of @cpu */ u64 get_cpu_iowait_time_us(int cpu, u64 *last_update_time) {
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2.53.0