tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 3a28772f4b29bdda924e9a5d2e3ff1ff1b23fd14 commit: 70a232a564cfa99401d197708cf380398ad5e2d7 [19669/21616] sched: Adjust wakeup cpu range according CPU util dynamicly config: x86_64-randconfig-102-20240206 (https://download.01.org/0day-ci/archive/20240206/202402062002.kXYC72o0-lkp@i...) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240206/202402062002.kXYC72o0-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/202402062002.kXYC72o0-lkp@intel.com/ All errors (new ones prefixed by >>): In file included from kernel/sched/fair.c:23: In file included from kernel/sched/sched.h:52: In file included from include/linux/migrate.h:6: In file included from include/linux/mempolicy.h:16: include/linux/pagemap.h:425:21: warning: cast from 'int (*)(struct file *, struct page *)' to 'filler_t *' (aka 'int (*)(void *, struct page *)') converts to incompatible function type [-Wcast-function-type-strict] 425 | filler_t *filler = (filler_t *)mapping->a_ops->readpage; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from kernel/sched/fair.c:23: kernel/sched/sched.h:1201:15: warning: cast from 'void (*)(struct rq *)' to 'void (*)(struct callback_head *)' converts to incompatible function type [-Wcast-function-type-strict] 1201 | head->func = (void (*)(struct callback_head *))func; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/fair.c:3675:6: warning: no previous prototype for function 'sync_entity_load_avg' [-Wmissing-prototypes] 3675 | void sync_entity_load_avg(struct sched_entity *se) | ^ kernel/sched/fair.c:3675:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 3675 | void sync_entity_load_avg(struct sched_entity *se) | ^ | static kernel/sched/fair.c:3688:6: warning: no previous prototype for function 'remove_entity_load_avg' [-Wmissing-prototypes] 3688 | void remove_entity_load_avg(struct sched_entity *se) | ^ kernel/sched/fair.c:3688:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 3688 | void remove_entity_load_avg(struct sched_entity *se) | ^ | static kernel/sched/fair.c:5206:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes] 5206 | void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} | ^ kernel/sched/fair.c:5206:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 5206 | void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {} | ^ | static

...

kernel/sched/fair.c:6701:19: error: incomplete definition of type 'struct task_group' 6701 | if (unlikely(!tg->se[cpu])) | ~~^ include/linux/compiler.h:77:42: note: expanded from macro 'unlikely' 77 | # define unlikely(x) __builtin_expect(!!(x), 0) | ^ include/linux/sched.h:57:8: note: forward declaration of 'struct task_group' 57 | struct task_group; | ^ kernel/sched/fair.c:6707:40: error: incomplete definition of type 'struct task_group' 6707 | spare = (long)(capacity_of(cpu) - tg->se[cpu]->avg.util_avg); | ~~^ include/linux/sched.h:57:8: note: forward declaration of 'struct task_group' 57 | struct task_group; | ^ kernel/sched/fair.c:6720:21: error: incomplete definition of type 'struct task_group' 6720 | util_avg_sum += tg->se[cpu]->avg.util_avg; | ~~^ include/linux/sched.h:57:8: note: forward declaration of 'struct task_group' 57 | struct task_group; | ^ kernel/sched/fair.c:6747:16: warning: variable 'time' set but not used [-Wunused-but-set-variable] 6747 | unsigned long time; | ^ kernel/sched/fair.c:7291:16: warning: variable 'time' set but not used [-Wunused-but-set-variable] 7291 | unsigned long time; | ^ kernel/sched/fair.c:11034:6: warning: no previous prototype for function 'free_fair_sched_group' [-Wmissing-prototypes] 11034 | void free_fair_sched_group(struct task_group *tg) { } | ^ kernel/sched/fair.c:11034:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 11034 | void free_fair_sched_group(struct task_group *tg) { } | ^ | static kernel/sched/fair.c:11036:5: warning: no previous prototype for function 'alloc_fair_sched_group' [-Wmissing-prototypes] 11036 | int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) | ^ kernel/sched/fair.c:11036:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 11036 | int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent) | ^ | static kernel/sched/fair.c:11041:6: warning: no previous prototype for function 'online_fair_sched_group' [-Wmissing-prototypes] 11041 | void online_fair_sched_group(struct task_group *tg) { } | ^ kernel/sched/fair.c:11041:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 11041 | void online_fair_sched_group(struct task_group *tg) { } | ^ | static kernel/sched/fair.c:11043:6: warning: no previous prototype for function 'unregister_fair_sched_group' [-Wmissing-prototypes] 11043 | void unregister_fair_sched_group(struct task_group *tg) { } | ^ kernel/sched/fair.c:11043:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 11043 | void unregister_fair_sched_group(struct task_group *tg) { } | ^ | static 11 warnings and 3 errors generated.

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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