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sched: Dynamic sched_domain::level 

Remove the SD_LV_ enum and use dynamic level assignments.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Nick Piggin <npiggin@kernel.dk>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20110407122942.969433965@chello.nl
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2011-04-07 14:10:04 +02:00 committed by Ingo Molnar
parent 54ab4ff431
commit 60495e7760
3 changed files with 10 additions and 24 deletions
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23
include/linux/sched.h
View File

@ -892,25 +892,6 @@ static inline struct cpumask *sched_group_cpus(struct sched_group *sg)
return to_cpumask(sg->cpumask);
}
enum sched_domain_level {
SD_LV_NONE = 0,
#ifdef CONFIG_SCHED_SMT
SD_LV_SIBLING,
#endif
#ifdef CONFIG_SCHED_MC
SD_LV_MC,
#endif
#ifdef CONFIG_SCHED_BOOK
SD_LV_BOOK,
#endif
SD_LV_CPU,
#ifdef CONFIG_NUMA
SD_LV_NODE,
SD_LV_ALLNODES,
#endif
SD_LV_MAX
};
struct sched_domain_attr {
int relax_domain_level;
};
@ -919,6 +900,8 @@ struct sched_domain_attr {
.relax_domain_level = -1, \
}
extern int sched_domain_level_max;
struct sched_domain {
/* These fields must be setup */
struct sched_domain *parent; /* top domain must be null terminated */
@ -936,7 +919,7 @@ struct sched_domain {
unsigned int forkexec_idx;
unsigned int smt_gain;
int flags; /* See SD_* */
enum sched_domain_level level;
int level;
/* Runtime fields. */
unsigned long last_balance; /* init to jiffies. units in jiffies */

2
kernel/cpuset.c
View File

@ -1159,7 +1159,7 @@ int current_cpuset_is_being_rebound(void)
static int update_relax_domain_level(struct cpuset *cs, s64 val)
{
#ifdef CONFIG_SMP
if (val < -1 || val >= SD_LV_MAX)
if (val < -1 || val >= sched_domain_level_max)
return -EINVAL;
#endif

9
kernel/sched.c
View File

@ -6966,7 +6966,6 @@ sd_init_##type(struct sched_domain_topology_level *tl, int cpu) \
{ \
struct sched_domain *sd = *per_cpu_ptr(tl->data.sd, cpu); \
*sd = SD_##type##_INIT; \
sd->level = SD_LV_##type; \
SD_INIT_NAME(sd, type); \
sd->private = &tl->data; \
return sd; \
@ -6988,13 +6987,14 @@ SD_INIT_FUNC(CPU)
#endif
static int default_relax_domain_level = -1;
int sched_domain_level_max;
static int __init setup_relax_domain_level(char *str)
{
unsigned long val;
val = simple_strtoul(str, NULL, 0);
if (val < SD_LV_MAX)
if (val < sched_domain_level_max)
default_relax_domain_level = val;
return 1;
@ -7173,8 +7173,11 @@ struct sched_domain *build_sched_domain(struct sched_domain_topology_level *tl,
set_domain_attribute(sd, attr);
cpumask_and(sched_domain_span(sd), cpu_map, tl->mask(cpu));
if (child)
if (child) {
sd->level = child->level + 1;
sched_domain_level_max = max(sched_domain_level_max, sd->level);
child->parent = sd;
}
sd->child = child;
return sd;