tree: https://git.linaro.org/people/vincent.guittot/kernel.git sched/pelt head: c2ebc392e23b7958705576a49091fe407b0ad7b3 commit: c2ebc392e23b7958705576a49091fe407b0ad7b3 [1/1] sched/fair: prefer prev cpu in asymmetric wakeup path config: x86_64-randconfig-m001-20201026 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> Reported-by: Dan Carpenter <[email protected]> smatch warnings: kernel/sched/fair.c:6227 select_idle_sibling() error: uninitialized symbol 'task_util'. vim +/task_util +6227 kernel/sched/fair.c 772bd008cd9a1d kernel/sched/fair.c Morten Rasmussen 2016-06-22 6212 static int select_idle_sibling(struct task_struct *p, int prev, int target) a50bde5130f657 kernel/sched_fair.c Peter Zijlstra 2009-11-12 6213 { 99bd5e2f245d8c kernel/sched_fair.c Suresh Siddha 2010-03-31 6214 struct sched_domain *sd; c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 6215 int i, recent_used_cpu, task_util; ^^^^^^^^^ a50bde5130f657 kernel/sched_fair.c Peter Zijlstra 2009-11-12 6216 b7a331615d2541 kernel/sched/fair.c Morten Rasmussen 2020-02-06 6217 /* c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 6218 * On asymmetric system, update task utilization because we will check c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 6219 * that the task fits with cpu's capacity. b7a331615d2541 kernel/sched/fair.c Morten Rasmussen 2020-02-06 6220 */ b7a331615d2541 kernel/sched/fair.c Morten Rasmussen 2020-02-06 6221 if (static_branch_unlikely(&sched_asym_cpucapacity)) { c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 6222 sync_entity_load_avg(&p->se); c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 6223 task_util = uclamp_task_util(p); b7a331615d2541 kernel/sched/fair.c Morten Rasmussen 2020-02-06 6224 } not initialized on else path. b7a331615d2541 kernel/sched/fair.c Morten Rasmussen 2020-02-06 6225 c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 6226 if ((available_idle_cpu(target) || sched_idle_cpu(target)) && c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 @6227 asym_fits_capacity(task_util, target)) ^^^^^^^^^ uninitialized variable warning. e0a79f529d5ba2 kernel/sched/fair.c Mike Galbraith 2013-01-28 6228 return target; 99bd5e2f245d8c kernel/sched_fair.c Suresh Siddha 2010-03-31 6229 99bd5e2f245d8c kernel/sched_fair.c Suresh Siddha 2010-03-31 6230 /* 97fb7a0a8944bd kernel/sched/fair.c Ingo Molnar 2018-03-03 6231 * If the previous CPU is cache affine and idle, don't be stupid: a50bde5130f657 kernel/sched_fair.c Peter Zijlstra 2009-11-12 6232 */ 3c29e651e16dd3 kernel/sched/fair.c Viresh Kumar 2019-06-26 6233 if (prev != target && cpus_share_cache(prev, target) && c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 6234 (available_idle_cpu(prev) || sched_idle_cpu(prev)) && c2ebc392e23b79 kernel/sched/fair.c Vincent Guittot 2020-10-21 6235 asym_fits_capacity(task_util, prev)) --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
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