diff options
Diffstat (limited to 'kernel/sched/tune.c')
| -rw-r--r-- | kernel/sched/tune.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/kernel/sched/tune.c b/kernel/sched/tune.c index 62d7a0f93cef..f8c4e29763d3 100644 --- a/kernel/sched/tune.c +++ b/kernel/sched/tune.c @@ -392,14 +392,12 @@ static void schedtune_cpu_update(int cpu) { struct boost_groups *bg; - int boost_max; + int boost_max = INT_MIN; int idx; bg = &per_cpu(cpu_boost_groups, cpu); - /* The root boost group is always active */ - boost_max = bg->group[0].boost; - for (idx = 1; idx < BOOSTGROUPS_COUNT; ++idx) { + for (idx = 0; idx < BOOSTGROUPS_COUNT; ++idx) { /* * A boost group affects a CPU only if it has * RUNNABLE tasks on that CPU @@ -409,10 +407,10 @@ schedtune_cpu_update(int cpu) boost_max = max(boost_max, bg->group[idx].boost); } - /* Ensures boost_max is non-negative when all cgroup boost values - * are neagtive. Avoids under-accounting of cpu capacity which may cause - * task stacking and frequency spikes.*/ - boost_max = max(boost_max, 0); + + /* If there are no active boost groups on the CPU, set no boost */ + if (boost_max == INT_MIN) + boost_max = 0; bg->boost_max = boost_max; } |