tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 03933bd11a64b94203f2cbe30ae71061807872fb commit: 70a232a564cfa99401d197708cf380398ad5e2d7 [19669/22602] sched: Adjust wakeup cpu range according CPU util dynamicly config: arm64-randconfig-001-20240531 (https://download.01.org/0day-ci/archive/20240531/202405310225.ixqT7RKx-lkp@i...) compiler: aarch64-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240531/202405310225.ixqT7RKx-lkp@i...) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202405310225.ixqT7RKx-lkp@intel.com/ All errors (new ones prefixed by >>): kernel/sched/fair.c:3675:6: warning: no previous prototype for 'sync_entity_load_avg' [-Wmissing-prototypes] 3675 | void sync_entity_load_avg(struct sched_entity *se) | ^~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:3688:6: warning: no previous prototype for 'remove_entity_load_avg' [-Wmissing-prototypes] 3688 | void remove_entity_load_avg(struct sched_entity *se) | ^~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:5206:6: warning: no previous prototype for 'init_cfs_bandwidth' [-Wmissing-prototypes] 5206 | void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} | ^~~~~~~~~~~~~~~~~~ In file included from arch/arm64/include/asm/current.h:5, from include/linux/sched.h:12, from kernel/sched/sched.h:5, from kernel/sched/fair.c:23: kernel/sched/fair.c: In function 'set_task_select_cpus':

...

kernel/sched/fair.c:6701:33: error: invalid use of undefined type 'struct task_group' 6701 | if (unlikely(!tg->se[cpu])) | ^~ include/linux/compiler.h:77:45: note: in definition of macro 'unlikely' 77 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ kernel/sched/fair.c:6707:61: error: invalid use of undefined type 'struct task_group' 6707 | spare = (long)(capacity_of(cpu) - tg->se[cpu]->avg.util_avg); | ^~ kernel/sched/fair.c:6720:35: error: invalid use of undefined type 'struct task_group' 6720 | util_avg_sum += tg->se[cpu]->avg.util_avg; | ^~ kernel/sched/fair.c: In function 'select_task_rq_fair': kernel/sched/fair.c:6747:23: warning: variable 'time' set but not used [-Wunused-but-set-variable] 6747 | unsigned long time; | ^~~~ kernel/sched/fair.c: In function 'pick_next_task_fair': kernel/sched/fair.c:7291:23: warning: variable 'time' set but not used [-Wunused-but-set-variable] 7291 | unsigned long time; | ^~~~ kernel/sched/fair.c: At top level: kernel/sched/fair.c:11034:6: warning: no previous prototype for 'free_fair_sched_group' [-Wmissing-prototypes] 11034 | void free_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11036:5: warning: no previous prototype for 'alloc_fair_sched_group' [-Wmissing-prototypes] 11036 | int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) | ^~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11041:6: warning: no previous prototype for 'online_fair_sched_group' [-Wmissing-prototypes] 11041 | void online_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:11043:6: warning: no previous prototype for 'unregister_fair_sched_group' [-Wmissing-prototypes] 11043 | void unregister_fair_sched_group(struct task_group *tg) { } | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/migrate.h:6, from kernel/sched/sched.h:52: include/linux/mempolicy.h:329:13: warning: '__do_mbind' defined but not used [-Wunused-function] 329 | static long __do_mbind(unsigned long start, unsigned long len, | ^~~~~~~~~~

vim +6701 kernel/sched/fair.c 6670 6671 /* 6672 * set_task_select_cpus: select the cpu range for task 6673 * @p: the task whose available cpu range will to set 6674 * @idlest_cpu: the cpu which is the idlest in prefer cpus 6675 * 6676 * If sum of 'util_avg' among 'preferred_cpus' lower than the percentage 6677 * 'sysctl_sched_util_low_pct' of 'preferred_cpus' capacity, select 6678 * 'preferred_cpus' range for task, otherwise select 'preferred_cpus' for task. 6679 * 6680 * The available cpu range set to p->select_cpus. Idlest cpu in preferred cpus 6681 * set to @idlest_cpu, which is set to wakeup cpu when fast path wakeup cpu 6682 * without p->select_cpus. 6683 */ 6684 static void set_task_select_cpus(struct task_struct *p, int *idlest_cpu, 6685 int sd_flag) 6686 { 6687 unsigned long util_avg_sum = 0; 6688 unsigned long tg_capacity = 0; 6689 long min_util = INT_MIN; 6690 struct task_group *tg; 6691 long spare; 6692 int cpu; 6693 6694 p->select_cpus = &p->cpus_allowed; 6695 if (!prefer_cpus_valid(p)) 6696 return; 6697 6698 rcu_read_lock(); 6699 tg = task_group(p); 6700 for_each_cpu(cpu, p->prefer_cpus) {

6701 if (unlikely(!tg->se[cpu])) 6702 continue; 6703 6704 if (idlest_cpu && available_idle_cpu(cpu)) { 6705 *idlest_cpu = cpu; 6706 } else if (idlest_cpu) { 6707 spare = (long)(capacity_of(cpu) - tg->se[cpu]->avg.util_avg); 6708 if (spare > min_util) { 6709 min_util = spare; 6710 *idlest_cpu = cpu; 6711 } 6712 } 6713 6714 if (available_idle_cpu(cpu)) { 6715 rcu_read_unlock(); 6716 p->select_cpus = p->prefer_cpus; 6717 return; 6718 } 6719 6720 util_avg_sum += tg->se[cpu]->avg.util_avg; 6721 tg_capacity += capacity_of(cpu); 6722 } 6723 rcu_read_unlock(); 6724 6725 if (tg_capacity > cpumask_weight(p->prefer_cpus) && 6726 util_avg_sum * 100 <= tg_capacity * sysctl_sched_util_low_pct) { 6727 p->select_cpus = p->prefer_cpus; 6728 } 6729 } 6730 #endif 6731

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