kernel.git/kernel/sched/pelt.c, branch linux-6.12.y

sched/fair: Rename h_nr_running into h_nr_queued

2025-07-10T14:04:56Z

[ Upstream commit 7b8a702d943827130cc00ae36075eff5500f86f1 ] With delayed dequeued feature, a sleeping sched_entity remains queued in the rq until its lag has elapsed but can't run. Rename h_nr_running into h_nr_queued to reflect this new behavior. Signed-off-by: Vincent Guittot Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Dietmar Eggemann Link: https://lore.kernel.org/r/20241202174606.4074512-4-vincent.guittot@linaro.org Stable-dep-of: aa3ee4f0b754 ("sched/fair: Fixup wake_up_sync() vs DELAYED_DEQUEUE") Signed-off-by: Sasha Levin

sched/eevdf: More PELT vs DELAYED_DEQUEUE

2024-12-27T13:01:58Z

[ Upstream commit 76f2f783294d7d55c2564e2dfb0a7279ba0bc264 ] Vincent and Dietmar noted that while commit fc1892becd56 ("sched/eevdf: Fixup PELT vs DELAYED_DEQUEUE") fixes the entity runnable stats, it does not adjust the cfs_rq runnable stats, which are based off of h_nr_running. Track h_nr_delayed such that we can discount those and adjust the signal. Fixes: fc1892becd56 ("sched/eevdf: Fixup PELT vs DELAYED_DEQUEUE") Closes: https://lore.kernel.org/lkml/a9a45193-d0c6-4ba2-a822-464ad30b550e@arm.com/ Closes: https://lore.kernel.org/lkml/CAKfTPtCNUvWE_GX5LyvTF-WdxUT=ZgvZZv-4t=eWntg5uOFqiQ@mail.gmail.com/ [ Fixes checkpatch warnings and rebased ] Signed-off-by: Peter Zijlstra (Intel) Reported-by: Dietmar Eggemann Reported-by: Vincent Guittot Signed-off-by: "Peter Zijlstra (Intel)" Signed-off-by: Vincent Guittot Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Dietmar Eggemann Tested-by: K Prateek Nayak Link: https://lore.kernel.org/r/20241202174606.4074512-3-vincent.guittot@linaro.org Signed-off-by: Sasha Levin

sched: Move update_other_load_avgs() to kernel/sched/pelt.c

2024-09-12T06:00:21Z

96fd6c65efc6 ("sched: Factor out update_other_load_avgs() from __update_blocked_others()") added update_other_load_avgs() in kernel/sched/syscalls.c right above effective_cpu_util(). This location didn't fit that well in the first place, and with 5d871a63997f ("sched/fair: Move effective_cpu_util() and effective_cpu_util() in fair.c") moving effective_cpu_util() to kernel/sched/fair.c, it looks even more out of place. Relocate the function to kernel/sched/pelt.c where all its callees are. No functional changes. Signed-off-by: Tejun Heo Cc: Peter Zijlstra Cc: Ingo Molnar

sched: Fix spelling in comments

2024-05-27T15:00:21Z

Do a spell-checking pass. Signed-off-by: Ingo Molnar Cc: Peter Zijlstra Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar

sched/cpufreq: Rename arch_update_thermal_pressure() => arch_update_hw_pressure()

2024-04-24T10:08:01Z

Now that cpufreq provides a pressure value to the scheduler, rename arch_update_thermal_pressure into HW pressure to reflect that it returns a pressure applied by HW (i.e. with a high frequency change) and not always related to thermal mitigation but also generated by max current limitation as an example. Such high frequency signal needs filtering to be smoothed and provide an value that reflects the average available capacity into the scheduler time scale. Signed-off-by: Vincent Guittot Signed-off-by: Ingo Molnar Tested-by: Lukasz Luba Reviewed-by: Qais Yousef Reviewed-by: Lukasz Luba Link: https://lore.kernel.org/r/20240326091616.3696851-5-vincent.guittot@linaro.org

sched/balancing: Fix a couple of outdated function names in comments

2024-03-12T11:00:01Z

The 'idle_balance()' function hasn't existed for years, and there's no load_balance_newidle() either - both are sched_balance_newidle() today. Reported-by: Honglei Wang Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/ZfAwNufbiyt/5biu@gmail.com

sched/balancing: Rename update_blocked_averages() => sched_balance_update_blocked_averages()

2024-03-12T11:00:00Z

Standardize scheduler load-balancing function names on the sched_balance_() prefix. Signed-off-by: Ingo Molnar Reviewed-by: Shrikanth Hegde Link: https://lore.kernel.org/r/20240308111819.1101550-10-mingo@kernel.org

sched: Make PELT acronym definition searchable

2023-10-13T07:56:30Z

The PELT acronym definition can be found right at the top of kernel/sched/pelt.c (of course), but it cannot be found through use of grep -r PELT kernel/sched/ Add the acronym "(PELT)" after "Per Entity Load Tracking" at the top of the source file. Signed-off-by: Mathieu Desnoyers Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20231012125824.1260774-1-mathieu.desnoyers@efficios.com

sched/headers: Introduce kernel/sched/build_policy.c and build multiple .c files there

2022-02-23T09:58:33Z

Similarly to kernel/sched/build_utility.c, collect all 'scheduling policy' related source code files into kernel/sched/build_policy.c: kernel/sched/idle.c kernel/sched/rt.c kernel/sched/cpudeadline.c kernel/sched/pelt.c kernel/sched/cputime.c kernel/sched/deadline.c With the exception of fair.c, which we continue to build as a separate file for build efficiency and parallelism reasons. Signed-off-by: Ingo Molnar Reviewed-by: Peter Zijlstra

sched: Fix various typos

2021-03-21T23:11:52Z

Fix ~42 single-word typos in scheduler code comments. We have accumulated a few fun ones over the years. :-) Signed-off-by: Ingo Molnar Cc: Peter Zijlstra Cc: Mike Galbraith Cc: Juri Lelli Cc: Vincent Guittot Cc: Dietmar Eggemann Cc: Steven Rostedt Cc: Ben Segall Cc: Mel Gorman Cc: linux-kernel@vger.kernel.org