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sched/debug: Rename the sched_debug parameter to sched_verbose

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CONFIG_SCHED_DEBUG is the build-time Kconfig knob, the boot param
sched_debug and the /debug/sched/debug_enabled knobs control the
sched_debug_enabled variable, but what they really do is make
SCHED_DEBUG more verbose, so rename the lot.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
Peter Zijlstra 2021-04-15 18:23:17 +02:00
parent 0c2de3f054
commit 9406415f46
5 changed files with 15 additions and 15 deletions
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2
Documentation/admin-guide/kernel-parameters.txt
View file

@ -4725,7 +4725,7 @@
sbni= [NET] Granch SBNI12 leased line adapter
sched_debug [KNL] Enables verbose scheduler debug messages.
sched_verbose [KNL] Enables verbose scheduler debug messages.
schedstats= [KNL,X86] Enable or disable scheduled statistics.
Allowed values are enable and disable. This feature

10
Documentation/scheduler/sched-domains.rst
View file

@ -74,8 +74,8 @@ for a given topology level by creating a sched_domain_topology_level array and
calling set_sched_topology() with this array as the parameter.
The sched-domains debugging infrastructure can be enabled by enabling
CONFIG_SCHED_DEBUG and adding 'sched_debug' to your cmdline. If you forgot to
tweak your cmdline, you can also flip the /sys/kernel/debug/sched_debug
knob. This enables an error checking parse of the sched domains which should
catch most possible errors (described above). It also prints out the domain
structure in a visual format.
CONFIG_SCHED_DEBUG and adding 'sched_debug_verbose' to your cmdline. If you
forgot to tweak your cmdline, you can also flip the
/sys/kernel/debug/sched/verbose knob. This enables an error checking parse of
the sched domains which should catch most possible errors (described above). It
also prints out the domain structure in a visual format.

4
kernel/sched/debug.c
View file

@ -275,7 +275,7 @@ static const struct file_operations sched_dynamic_fops = {
#endif /* CONFIG_PREEMPT_DYNAMIC */
__read_mostly bool sched_debug_enabled;
__read_mostly bool sched_debug_verbose;
static const struct seq_operations sched_debug_sops;
@ -300,7 +300,7 @@ static __init int sched_init_debug(void)
debugfs_sched = debugfs_create_dir("sched", NULL);
debugfs_create_file("features", 0644, debugfs_sched, NULL, &sched_feat_fops);
debugfs_create_bool("debug_enabled", 0644, debugfs_sched, &sched_debug_enabled);
debugfs_create_bool("verbose", 0644, debugfs_sched, &sched_debug_verbose);
#ifdef CONFIG_PREEMPT_DYNAMIC
debugfs_create_file("preempt", 0644, debugfs_sched, NULL, &sched_dynamic_fops);
#endif

2
kernel/sched/sched.h
View file

@ -2363,7 +2363,7 @@ extern struct sched_entity *__pick_first_entity(struct cfs_rq *cfs_rq);
extern struct sched_entity *__pick_last_entity(struct cfs_rq *cfs_rq);
#ifdef CONFIG_SCHED_DEBUG
extern bool sched_debug_enabled;
extern bool sched_debug_verbose;
extern void print_cfs_stats(struct seq_file *m, int cpu);
extern void print_rt_stats(struct seq_file *m, int cpu);

12
kernel/sched/topology.c
View file

@ -14,15 +14,15 @@ static cpumask_var_t sched_domains_tmpmask2;
static int __init sched_debug_setup(char *str)
{
sched_debug_enabled = true;
sched_debug_verbose = true;
return 0;
}
early_param("sched_debug", sched_debug_setup);
early_param("sched_verbose", sched_debug_setup);
static inline bool sched_debug(void)
{
return sched_debug_enabled;
return sched_debug_verbose;
}
#define SD_FLAG(_name, mflags) [__##_name] = { .meta_flags = mflags, .name = #_name },
@ -131,7 +131,7 @@ static void sched_domain_debug(struct sched_domain *sd, int cpu)
{
int level = 0;
if (!sched_debug_enabled)
if (!sched_debug_verbose)
return;
if (!sd) {
@ -152,7 +152,7 @@ static void sched_domain_debug(struct sched_domain *sd, int cpu)
}
#else /* !CONFIG_SCHED_DEBUG */
# define sched_debug_enabled 0
# define sched_debug_verbose 0
# define sched_domain_debug(sd, cpu) do { } while (0)
static inline bool sched_debug(void)
{
@ -2141,7 +2141,7 @@ build_sched_domains(const struct cpumask *cpu_map, struct sched_domain_attr *att
if (has_asym)
static_branch_inc_cpuslocked(&sched_asym_cpucapacity);
if (rq && sched_debug_enabled) {
if (rq && sched_debug_verbose) {
pr_info("root domain span: %*pbl (max cpu_capacity = %lu)\n",
cpumask_pr_args(cpu_map), rq->rd->max_cpu_capacity);
}