sched,debug: Convert sysctl sched_domains to debugfs
Stop polluting sysctl, move to debugfs for SCHED_DEBUG stuff. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com> Reviewed-by: Valentin Schneider <valentin.schneider@arm.com> Tested-by: Valentin Schneider <valentin.schneider@arm.com> Link: https://lkml.kernel.org/r/YHgB/s4KCBQ1ifdm@hirez.programming.kicks-ass.net
This commit is contained in:
Peter Zijlstra
parent
9af0440ec8
commit
3b87f136f8
|
|
@ -299,6 +299,10 @@ static __init int sched_init_debug(void)
|
|||
debugfs_create_file("tunable_scaling", 0644, debugfs_sched, NULL, &sched_scaling_fops);
|
||||
debugfs_create_u32("migration_cost_ns", 0644, debugfs_sched, &sysctl_sched_migration_cost);
|
||||
debugfs_create_u32("nr_migrate", 0644, debugfs_sched, &sysctl_sched_nr_migrate);
|
||||
|
||||
mutex_lock(&sched_domains_mutex);
|
||||
update_sched_domain_debugfs();
|
||||
mutex_unlock(&sched_domains_mutex);
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_NUMA_BALANCING
|
||||
|
|
@ -316,229 +320,88 @@ late_initcall(sched_init_debug);
|
|||
|
||||
#ifdef CONFIG_SMP
|
||||
|
||||
#ifdef CONFIG_SYSCTL
|
||||
static cpumask_var_t sd_sysctl_cpus;
|
||||
static struct dentry *sd_dentry;
|
||||
|
||||
static struct ctl_table sd_ctl_dir[] = {
|
||||
{
|
||||
.procname = "sched_domain",
|
||||
.mode = 0555,
|
||||
},
|
||||
{}
|
||||
};
|
||||
|
||||
static struct ctl_table sd_ctl_root[] = {
|
||||
{
|
||||
.procname = "kernel",
|
||||
.mode = 0555,
|
||||
.child = sd_ctl_dir,
|
||||
},
|
||||
{}
|
||||
};
|
||||
|
||||
static struct ctl_table *sd_alloc_ctl_entry(int n)
|
||||
static int sd_flags_show(struct seq_file *m, void *v)
|
||||
{
|
||||
struct ctl_table *entry =
|
||||
kcalloc(n, sizeof(struct ctl_table), GFP_KERNEL);
|
||||
|
||||
return entry;
|
||||
}
|
||||
|
||||
static void sd_free_ctl_entry(struct ctl_table **tablep)
|
||||
{
|
||||
struct ctl_table *entry;
|
||||
|
||||
/*
|
||||
* In the intermediate directories, both the child directory and
|
||||
* procname are dynamically allocated and could fail but the mode
|
||||
* will always be set. In the lowest directory the names are
|
||||
* static strings and all have proc handlers.
|
||||
*/
|
||||
for (entry = *tablep; entry->mode; entry++) {
|
||||
if (entry->child)
|
||||
sd_free_ctl_entry(&entry->child);
|
||||
if (entry->proc_handler == NULL)
|
||||
kfree(entry->procname);
|
||||
}
|
||||
|
||||
kfree(*tablep);
|
||||
*tablep = NULL;
|
||||
}
|
||||
|
||||
static void
|
||||
set_table_entry(struct ctl_table *entry,
|
||||
const char *procname, void *data, int maxlen,
|
||||
umode_t mode, proc_handler *proc_handler)
|
||||
{
|
||||
entry->procname = procname;
|
||||
entry->data = data;
|
||||
entry->maxlen = maxlen;
|
||||
entry->mode = mode;
|
||||
entry->proc_handler = proc_handler;
|
||||
}
|
||||
|
||||
static int sd_ctl_doflags(struct ctl_table *table, int write,
|
||||
void *buffer, size_t *lenp, loff_t *ppos)
|
||||
{
|
||||
unsigned long flags = *(unsigned long *)table->data;
|
||||
size_t data_size = 0;
|
||||
size_t len = 0;
|
||||
char *tmp, *buf;
|
||||
unsigned long flags = *(unsigned int *)m->private;
|
||||
int idx;
|
||||
|
||||
if (write)
|
||||
return 0;
|
||||
|
||||
for_each_set_bit(idx, &flags, __SD_FLAG_CNT) {
|
||||
char *name = sd_flag_debug[idx].name;
|
||||
|
||||
/* Name plus whitespace */
|
||||
data_size += strlen(name) + 1;
|
||||
seq_puts(m, sd_flag_debug[idx].name);
|
||||
seq_puts(m, " ");
|
||||
}
|
||||
|
||||
if (*ppos > data_size) {
|
||||
*lenp = 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
buf = kcalloc(data_size + 1, sizeof(*buf), GFP_KERNEL);
|
||||
if (!buf)
|
||||
return -ENOMEM;
|
||||
|
||||
for_each_set_bit(idx, &flags, __SD_FLAG_CNT) {
|
||||
char *name = sd_flag_debug[idx].name;
|
||||
|
||||
len += snprintf(buf + len, strlen(name) + 2, "%s ", name);
|
||||
}
|
||||
|
||||
tmp = buf + *ppos;
|
||||
len -= *ppos;
|
||||
|
||||
if (len > *lenp)
|
||||
len = *lenp;
|
||||
if (len)
|
||||
memcpy(buffer, tmp, len);
|
||||
if (len < *lenp) {
|
||||
((char *)buffer)[len] = '\n';
|
||||
len++;
|
||||
}
|
||||
|
||||
*lenp = len;
|
||||
*ppos += len;
|
||||
|
||||
kfree(buf);
|
||||
seq_puts(m, "\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct ctl_table *
|
||||
sd_alloc_ctl_domain_table(struct sched_domain *sd)
|
||||
static int sd_flags_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct ctl_table *table = sd_alloc_ctl_entry(9);
|
||||
|
||||
if (table == NULL)
|
||||
return NULL;
|
||||
|
||||
set_table_entry(&table[0], "min_interval", &sd->min_interval, sizeof(long), 0644, proc_doulongvec_minmax);
|
||||
set_table_entry(&table[1], "max_interval", &sd->max_interval, sizeof(long), 0644, proc_doulongvec_minmax);
|
||||
set_table_entry(&table[2], "busy_factor", &sd->busy_factor, sizeof(int), 0644, proc_dointvec_minmax);
|
||||
set_table_entry(&table[3], "imbalance_pct", &sd->imbalance_pct, sizeof(int), 0644, proc_dointvec_minmax);
|
||||
set_table_entry(&table[4], "cache_nice_tries", &sd->cache_nice_tries, sizeof(int), 0644, proc_dointvec_minmax);
|
||||
set_table_entry(&table[5], "flags", &sd->flags, sizeof(int), 0444, sd_ctl_doflags);
|
||||
set_table_entry(&table[6], "max_newidle_lb_cost", &sd->max_newidle_lb_cost, sizeof(long), 0644, proc_doulongvec_minmax);
|
||||
set_table_entry(&table[7], "name", sd->name, CORENAME_MAX_SIZE, 0444, proc_dostring);
|
||||
/* &table[8] is terminator */
|
||||
|
||||
return table;
|
||||
return single_open(file, sd_flags_show, inode->i_private);
|
||||
}
|
||||
|
||||
static struct ctl_table *sd_alloc_ctl_cpu_table(int cpu)
|
||||
static const struct file_operations sd_flags_fops = {
|
||||
.open = sd_flags_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = single_release,
|
||||
};
|
||||
|
||||
static void register_sd(struct sched_domain *sd, struct dentry *parent)
|
||||
{
|
||||
struct ctl_table *entry, *table;
|
||||
struct sched_domain *sd;
|
||||
int domain_num = 0, i;
|
||||
char buf[32];
|
||||
#define SDM(type, mode, member) \
|
||||
debugfs_create_##type(#member, mode, parent, &sd->member)
|
||||
|
||||
for_each_domain(cpu, sd)
|
||||
domain_num++;
|
||||
entry = table = sd_alloc_ctl_entry(domain_num + 1);
|
||||
if (table == NULL)
|
||||
return NULL;
|
||||
SDM(ulong, 0644, min_interval);
|
||||
SDM(ulong, 0644, max_interval);
|
||||
SDM(u64, 0644, max_newidle_lb_cost);
|
||||
SDM(u32, 0644, busy_factor);
|
||||
SDM(u32, 0644, imbalance_pct);
|
||||
SDM(u32, 0644, cache_nice_tries);
|
||||
SDM(str, 0444, name);
|
||||
|
||||
i = 0;
|
||||
for_each_domain(cpu, sd) {
|
||||
snprintf(buf, 32, "domain%d", i);
|
||||
entry->procname = kstrdup(buf, GFP_KERNEL);
|
||||
entry->mode = 0555;
|
||||
entry->child = sd_alloc_ctl_domain_table(sd);
|
||||
entry++;
|
||||
i++;
|
||||
}
|
||||
return table;
|
||||
#undef SDM
|
||||
|
||||
debugfs_create_file("flags", 0444, parent, &sd->flags, &sd_flags_fops);
|
||||
}
|
||||
|
||||
static cpumask_var_t sd_sysctl_cpus;
|
||||
static struct ctl_table_header *sd_sysctl_header;
|
||||
|
||||
void register_sched_domain_sysctl(void)
|
||||
void update_sched_domain_debugfs(void)
|
||||
{
|
||||
static struct ctl_table *cpu_entries;
|
||||
static struct ctl_table **cpu_idx;
|
||||
static bool init_done = false;
|
||||
char buf[32];
|
||||
int i;
|
||||
|
||||
if (!cpu_entries) {
|
||||
cpu_entries = sd_alloc_ctl_entry(num_possible_cpus() + 1);
|
||||
if (!cpu_entries)
|
||||
return;
|
||||
|
||||
WARN_ON(sd_ctl_dir[0].child);
|
||||
sd_ctl_dir[0].child = cpu_entries;
|
||||
}
|
||||
|
||||
if (!cpu_idx) {
|
||||
struct ctl_table *e = cpu_entries;
|
||||
|
||||
cpu_idx = kcalloc(nr_cpu_ids, sizeof(struct ctl_table*), GFP_KERNEL);
|
||||
if (!cpu_idx)
|
||||
return;
|
||||
|
||||
/* deal with sparse possible map */
|
||||
for_each_possible_cpu(i) {
|
||||
cpu_idx[i] = e;
|
||||
e++;
|
||||
}
|
||||
}
|
||||
int cpu, i;
|
||||
|
||||
if (!cpumask_available(sd_sysctl_cpus)) {
|
||||
if (!alloc_cpumask_var(&sd_sysctl_cpus, GFP_KERNEL))
|
||||
return;
|
||||
}
|
||||
|
||||
if (!init_done) {
|
||||
init_done = true;
|
||||
/* init to possible to not have holes in @cpu_entries */
|
||||
cpumask_copy(sd_sysctl_cpus, cpu_possible_mask);
|
||||
}
|
||||
|
||||
for_each_cpu(i, sd_sysctl_cpus) {
|
||||
struct ctl_table *e = cpu_idx[i];
|
||||
if (!sd_dentry)
|
||||
sd_dentry = debugfs_create_dir("domains", debugfs_sched);
|
||||
|
||||
if (e->child)
|
||||
sd_free_ctl_entry(&e->child);
|
||||
for_each_cpu(cpu, sd_sysctl_cpus) {
|
||||
struct sched_domain *sd;
|
||||
struct dentry *d_cpu;
|
||||
char buf[32];
|
||||
|
||||
if (!e->procname) {
|
||||
snprintf(buf, 32, "cpu%d", i);
|
||||
e->procname = kstrdup(buf, GFP_KERNEL);
|
||||
snprintf(buf, sizeof(buf), "cpu%d", cpu);
|
||||
debugfs_remove(debugfs_lookup(buf, sd_dentry));
|
||||
d_cpu = debugfs_create_dir(buf, sd_dentry);
|
||||
|
||||
i = 0;
|
||||
for_each_domain(cpu, sd) {
|
||||
struct dentry *d_sd;
|
||||
|
||||
snprintf(buf, sizeof(buf), "domain%d", i);
|
||||
d_sd = debugfs_create_dir(buf, d_cpu);
|
||||
|
||||
register_sd(sd, d_sd);
|
||||
i++;
|
||||
}
|
||||
e->mode = 0555;
|
||||
e->child = sd_alloc_ctl_cpu_table(i);
|
||||
|
||||
__cpumask_clear_cpu(i, sd_sysctl_cpus);
|
||||
__cpumask_clear_cpu(cpu, sd_sysctl_cpus);
|
||||
}
|
||||
|
||||
WARN_ON(sd_sysctl_header);
|
||||
sd_sysctl_header = register_sysctl_table(sd_ctl_root);
|
||||
}
|
||||
|
||||
void dirty_sched_domain_sysctl(int cpu)
|
||||
|
|
@ -547,13 +410,6 @@ void dirty_sched_domain_sysctl(int cpu)
|
|||
__cpumask_set_cpu(cpu, sd_sysctl_cpus);
|
||||
}
|
||||
|
||||
/* may be called multiple times per register */
|
||||
void unregister_sched_domain_sysctl(void)
|
||||
{
|
||||
unregister_sysctl_table(sd_sysctl_header);
|
||||
sd_sysctl_header = NULL;
|
||||
}
|
||||
#endif /* CONFIG_SYSCTL */
|
||||
#endif /* CONFIG_SMP */
|
||||
|
||||
#ifdef CONFIG_FAIR_GROUP_SCHED
|
||||
|
|
|
|||
|
|
@ -1552,20 +1552,16 @@ static inline unsigned int group_first_cpu(struct sched_group *group)
|
|||
|
||||
extern int group_balance_cpu(struct sched_group *sg);
|
||||
|
||||
#if defined(CONFIG_SCHED_DEBUG) && defined(CONFIG_SYSCTL)
|
||||
void register_sched_domain_sysctl(void);
|
||||
#ifdef CONFIG_SCHED_DEBUG
|
||||
void update_sched_domain_debugfs(void);
|
||||
void dirty_sched_domain_sysctl(int cpu);
|
||||
void unregister_sched_domain_sysctl(void);
|
||||
#else
|
||||
static inline void register_sched_domain_sysctl(void)
|
||||
static inline void update_sched_domain_debugfs(void)
|
||||
{
|
||||
}
|
||||
static inline void dirty_sched_domain_sysctl(int cpu)
|
||||
{
|
||||
}
|
||||
static inline void unregister_sched_domain_sysctl(void)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
extern int sched_update_scaling(void);
|
||||
|
|
|
|||
|
|
@ -2223,7 +2223,6 @@ int sched_init_domains(const struct cpumask *cpu_map)
|
|||
doms_cur = &fallback_doms;
|
||||
cpumask_and(doms_cur[0], cpu_map, housekeeping_cpumask(HK_FLAG_DOMAIN));
|
||||
err = build_sched_domains(doms_cur[0], NULL);
|
||||
register_sched_domain_sysctl();
|
||||
|
||||
return err;
|
||||
}
|
||||
|
|
@ -2298,9 +2297,6 @@ void partition_sched_domains_locked(int ndoms_new, cpumask_var_t doms_new[],
|
|||
|
||||
lockdep_assert_held(&sched_domains_mutex);
|
||||
|
||||
/* Always unregister in case we don't destroy any domains: */
|
||||
unregister_sched_domain_sysctl();
|
||||
|
||||
/* Let the architecture update CPU core mappings: */
|
||||
new_topology = arch_update_cpu_topology();
|
||||
|
||||
|
|
@ -2389,7 +2385,7 @@ match3:
|
|||
dattr_cur = dattr_new;
|
||||
ndoms_cur = ndoms_new;
|
||||
|
||||
register_sched_domain_sysctl();
|
||||
update_sched_domain_debugfs();
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
|||
Loading…
Reference in New Issue