tree: https://github.com/zen-kernel/zen-kernel 5.12/muqss head: 5ea144678c3922d46a7030127bff3b8178e870d0 commit: 08f6a6f8ef28aef1402902c870643b4925057db0 [2/3] muqss: Tune CPU selection config: parisc-randconfig-r016-20210711 (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/zen-kernel/zen-kernel/commit/08f6a6f8ef28aef1402902c87... git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel git fetch --no-tags zen-kernel-zen-kernel 5.12/muqss git checkout 08f6a6f8ef28aef1402902c870643b4925057db0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): kernel/sched/MuQSS.c:209:36: error: 'CONFIG_SHARERQ' undeclared here (not in a function); did you mean 'CONFIG_CHARLCD'? 209 | static int rqshare __read_mostly = CONFIG_SHARERQ; /* Default RQSHARE_MC */ | ^~~~~~~~~~~~~~ | CONFIG_CHARLCD kernel/sched/MuQSS.c:263:12: warning: no previous prototype for 'arch_sd_sibling_asym_packing' [-Wmissing-prototypes] 263 | int __weak arch_sd_sibling_asym_packing(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/sched/MuQSS.c:661:6: warning: no previous prototype for 'resched_task' [-Wmissing-prototypes] 661 | void resched_task(struct task_struct *p) | ^~~~~~~~~~~~ kernel/sched/MuQSS.c: In function 'best_mask_cpu': 1136 | #elif CONFIG_SCHED_MC | ^~~~~~~~~~~~~~~ kernel/sched/MuQSS.c:1126:13: warning: variable 'tmp_rq' set but not used [-Wunused-but-set-variable] 1126 | struct rq *tmp_rq; | ^~~~~~ kernel/sched/MuQSS.c: At top level: kernel/sched/MuQSS.c:3169:15: warning: no previous prototype for 'nr_active' [-Wmissing-prototypes] 3169 | unsigned long nr_active(void) | ^~~~~~~~~ kernel/sched/MuQSS.c:6577:1: warning: no previous prototype for '__do_set_cpus_allowed' [-Wmissing-prototypes] 6577 | __do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) | ^~~~~~~~~~~~~~~~~~~~~ kernel/sched/MuQSS.c:6708:6: warning: no previous prototype for 'resched_cpu' [-Wmissing-prototypes] 6708 | void resched_cpu(int cpu) | ^~~~~~~~~~~ kernel/sched/MuQSS.c:7043:6: warning: no previous prototype for 'sched_set_stop_task' [-Wmissing-prototypes] 7043 | void sched_set_stop_task(int cpu, struct task_struct *stop) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/MuQSS.c: In function 'setup_rq_orders': kernel/sched/MuQSS.c:7675:22: warning: unused variable 'i' [-Wunused-variable] 7675 | int cpu, other_cpu, i; | ^ kernel/sched/MuQSS.c: At top level: kernel/sched/MuQSS.c:8186:6: warning: no previous prototype for 'init_idle_bootup_task' [-Wmissing-prototypes] 8186 | void init_idle_bootup_task(struct task_struct *idle) | ^~~~~~~~~~~~~~~~~~~~~ Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for HIGH_RES_TIMERS Depends on GENERIC_CLOCKEVENTS Selected by - SCHED_MUQSS vim +/CONFIG_SCHED_MC +1136 kernel/sched/MuQSS.c 1104 1105 /* 1106 * The best idle CPU is chosen according to the CPUIDLE ranking above where the 1107 * lowest value would give the most suitable CPU to schedule p onto next. The 1108 * order works out to be the following: 1109 * 1110 * Same thread, idle or busy cache, idle or busy threads 1111 * Other core, same cache, idle or busy cache, idle threads. 1112 * Same node, other CPU, idle cache, idle threads. 1113 * Same node, other CPU, busy cache, idle threads. 1114 * Other core, same cache, busy threads. 1115 * Same node, other CPU, busy threads. 1116 * Other node, other CPU, idle cache, idle threads. 1117 * Other node, other CPU, busy cache, idle threads. 1118 * Other node, other CPU, busy threads. 1119 */ 1120 static int best_mask_cpu(int best_cpu, struct rq *rq, cpumask_t *tmpmask) 1121 { 1122 int best_ranking = CPUIDLE_DIFF_NODE | CPUIDLE_THREAD_BUSY | 1123 CPUIDLE_DIFF_CPU | CPUIDLE_CACHE_BUSY | CPUIDLE_DIFF_CORE | 1124 CPUIDLE_DIFF_CORE_LLC | CPUIDLE_DIFF_THREAD; 1125 int cpu_tmp, best_poss_ranking; 1126 struct rq *tmp_rq; 1127 1128 tmp_rq = cpu_rq(best_cpu); 1129 if (!(cpumask_test_cpu(best_cpu, tmpmask) 1130 #ifdef CONFIG_SCHED_SMT 1131 && tmp_rq->siblings_idle(tmp_rq) 1132 #endif 1133 )) { 1134 #ifdef CONFIG_SCHED_SMT 1135 best_poss_ranking = CPUIDLE_DIFF_THREAD; 1137 best_poss_ranking = CPUIDLE_DIFF_CORE_LLC; 1138 #else 1139 best_poss_ranking = CPUIDLE_DIFF_CPU; 1140 #endif 1141 for_each_cpu(cpu_tmp, tmpmask) { 1142 int ranking, locality; 1143 1144 ranking = 0; 1145 tmp_rq = cpu_rq(cpu_tmp); 1146 locality = rq->cpu_locality[cpu_tmp]; 1147 #ifdef CONFIG_NUMA 1148 if (locality > LOCALITY_SMP) 1149 ranking |= CPUIDLE_DIFF_NODE; 1150 else 1151 #endif 1152 if (locality > LOCALITY_MC) 1153 ranking |= CPUIDLE_DIFF_CPU; 1154 #ifdef CONFIG_SCHED_MC 1155 else if (locality == LOCALITY_MC_LLC) 1156 ranking |= CPUIDLE_DIFF_CORE_LLC; 1157 else if (locality == LOCALITY_MC) 1158 ranking |= CPUIDLE_DIFF_CORE; 1159 #endif 1160 #ifdef CONFIG_SCHED_SMT 1161 else if (locality == LOCALITY_SMT) 1162 ranking |= CPUIDLE_DIFF_THREAD; 1163 #endif 1164 #ifdef CONFIG_SCHED_MC 1165 if (ranking < best_ranking) { 1166 if (!(tmp_rq->cache_idle(tmp_rq))) 1167 ranking |= CPUIDLE_CACHE_BUSY; 1168 #endif 1169 #ifdef CONFIG_SCHED_SMT 1170 if (ranking < best_ranking) { 1171 if (!(tmp_rq->siblings_idle(tmp_rq))) { 1172 ranking |= CPUIDLE_THREAD_BUSY; 1173 if (locality == LOCALITY_SMT) 1174 best_poss_ranking = CPUIDLE_DIFF_CORE_LLC; 1175 } 1176 #endif 1177 if (ranking < best_ranking) { 1178 best_cpu = cpu_tmp; 1179 best_ranking = ranking; 1180 } 1181 #ifdef CONFIG_SCHED_SMT 1182 } 1183 #endif 1184 #ifdef CONFIG_SCHED_MC 1185 } 1186 #endif 1187 if (best_ranking <= best_poss_ranking) 1188 break; 1189 } 1190 } 1191 return best_cpu; 1192 } 1193 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org