diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index 6d7bf55ec33d..0feeacb91497 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1286,21 +1286,29 @@ static int sched_balance_self(int cpu, int flag) while (sd) { cpumask_t span; struct sched_group *group; - int new_cpu; - int weight; + int new_cpu, weight; + + if (!(sd->flags & flag)) { + sd = sd->child; + continue; + } span = sd->span; group = find_idlest_group(sd, t, cpu); - if (!group) - goto nextlevel; + if (!group) { + sd = sd->child; + continue; + } new_cpu = find_idlest_cpu(group, t, cpu); - if (new_cpu == -1 || new_cpu == cpu) - goto nextlevel; + if (new_cpu == -1 || new_cpu == cpu) { + /* Now try balancing at a lower domain level of cpu */ + sd = sd->child; + continue; + } - /* Now try balancing at a lower domain level */ + /* Now try balancing at a lower domain level of new_cpu */ cpu = new_cpu; -nextlevel: sd = NULL; weight = cpus_weight(span); for_each_domain(cpu, tmp) { @@ -5448,12 +5456,18 @@ static void cpu_attach_domain(struct sched_domain *sd, int cpu) struct sched_domain *parent = tmp->parent; if (!parent) break; - if (sd_parent_degenerate(tmp, parent)) + if (sd_parent_degenerate(tmp, parent)) { tmp->parent = parent->parent; + if (parent->parent) + parent->parent->child = tmp; + } } - if (sd && sd_degenerate(sd)) + if (sd && sd_degenerate(sd)) { sd = sd->parent; + if (sd) + sd->child = NULL; + } sched_domain_debug(sd, cpu); @@ -6288,6 +6302,8 @@ static int build_sched_domains(const cpumask_t *cpu_map) *sd = SD_NODE_INIT; sd->span = sched_domain_node_span(cpu_to_node(i)); sd->parent = p; + if (p) + p->child = sd; cpus_and(sd->span, sd->span, *cpu_map); #endif @@ -6297,6 +6313,8 @@ static int build_sched_domains(const cpumask_t *cpu_map) *sd = SD_CPU_INIT; sd->span = nodemask; sd->parent = p; + if (p) + p->child = sd; sd->groups = &sched_group_phys[group]; #ifdef CONFIG_SCHED_MC @@ -6307,6 +6325,7 @@ static int build_sched_domains(const cpumask_t *cpu_map) sd->span = cpu_coregroup_map(i); cpus_and(sd->span, sd->span, *cpu_map); sd->parent = p; + p->child = sd; sd->groups = &sched_group_core[group]; #endif @@ -6318,6 +6337,7 @@ static int build_sched_domains(const cpumask_t *cpu_map) sd->span = cpu_sibling_map[i]; cpus_and(sd->span, sd->span, *cpu_map); sd->parent = p; + p->child = sd; sd->groups = &sched_group_cpus[group]; #endif } |