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| author | Valentin Schneider <valentin.schneider@arm.com> | 2020-08-17 13:29:51 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-08-19 10:49:48 +0200 |
| commit | 65c5e253168dbbb52c20026b0c5b7a2f344b9197 (patch) | |
| tree | c749e9a9823031f1564caf7e9830f50184dd59ba /kernel/sched/topology.c | |
| parent | sched/topology: Define and assign sched_domain flag metadata (diff) | |
| download | linux-65c5e253168dbbb52c20026b0c5b7a2f344b9197.tar.xz linux-65c5e253168dbbb52c20026b0c5b7a2f344b9197.zip | |
sched/topology: Verify SD_* flags setup when sched_debug is on
Now that we have some description of what we expect the flags layout to
be, we can use that to assert at runtime that the actual layout is sane.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: https://lore.kernel.org/r/20200817113003.20802-6-valentin.schneider@arm.com
Diffstat (limited to 'kernel/sched/topology.c')
| -rw-r--r-- | kernel/sched/topology.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index fe0396978fea..cbdaf084ff32 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -29,6 +29,8 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level, struct cpumask *groupmask) { struct sched_group *group = sd->groups; + unsigned long flags = sd->flags; + unsigned int idx; cpumask_clear(groupmask); @@ -43,6 +45,21 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level, printk(KERN_ERR "ERROR: domain->groups does not contain CPU%d\n", cpu); } + for_each_set_bit(idx, &flags, __SD_FLAG_CNT) { + unsigned int flag = BIT(idx); + unsigned int meta_flags = sd_flag_debug[idx].meta_flags; + + if ((meta_flags & SDF_SHARED_CHILD) && sd->child && + !(sd->child->flags & flag)) + printk(KERN_ERR "ERROR: flag %s set here but not in child\n", + sd_flag_debug[idx].name); + + if ((meta_flags & SDF_SHARED_PARENT) && sd->parent && + !(sd->parent->flags & flag)) + printk(KERN_ERR "ERROR: flag %s set here but not in parent\n", + sd_flag_debug[idx].name); + } + printk(KERN_DEBUG "%*s groups:", level + 1, ""); do { if (!group) { |