Messages in this thread Patch in this message | | | From | Vitalii Bursov <> | Subject | [PATCH 1/1] sched/fair: allow disabling newidle_balance with sched_relax_domain_level | Date | Thu, 28 Mar 2024 02:30:18 +0200 |
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Change relax_domain_level checks so that it would be possible to exclude all domains from newidle balancing.
This matches the behavior described in the documentation: -1 no request. use system default or follow request of others. 0 no search. 1 search siblings (hyperthreads in a core).
"2" enables levels 0 and 1, level_max excludes the last (level_max) level, and level_max+1 includes all levels.
Signed-off-by: Vitalii Bursov <vitaly@bursov.com> --- kernel/cgroup/cpuset.c | 2 +- kernel/sched/debug.c | 1 + kernel/sched/topology.c | 2 +- 3 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 4237c874871..da24187c4e0 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -2948,7 +2948,7 @@ bool current_cpuset_is_being_rebound(void) static int update_relax_domain_level(struct cpuset *cs, s64 val) { #ifdef CONFIG_SMP - if (val < -1 || val >= sched_domain_level_max) + if (val < -1 || val > sched_domain_level_max + 1) return -EINVAL; #endif diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c index 8d5d98a5834..8454cd4e5e1 100644 --- a/kernel/sched/debug.c +++ b/kernel/sched/debug.c @@ -423,6 +423,7 @@ static void register_sd(struct sched_domain *sd, struct dentry *parent) #undef SDM + debugfs_create_u32("level", 0444, parent, (u32 *)&sd->level); debugfs_create_file("flags", 0444, parent, &sd->flags, &sd_flags_fops); debugfs_create_file("groups_flags", 0444, parent, &sd->groups->flags, &sd_flags_fops); } diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index 99ea5986038..3127c9b30af 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -1468,7 +1468,7 @@ static void set_domain_attribute(struct sched_domain *sd, } else request = attr->relax_domain_level; - if (sd->level > request) { + if (sd->level >= request) { /* Turn off idle balance on this domain: */ sd->flags &= ~(SD_BALANCE_WAKE|SD_BALANCE_NEWIDLE); } -- 2.20.1
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