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Date: Sun, 17 Dec 2023 12:02:28 +0800
From: kernel test robot <lkp@...el.com>
To: Junwen Wu <wudaemon@....com>, mingo@...hat.com, juri.lelli@...hat.com,
vincent.guittot@...aro.org, bsegall@...gle.com, vschneid@...hat.com
Cc: oe-kbuild-all@...ts.linux.dev, mgorman@...e.de, bristot@...hat.com,
linux-kernel@...r.kernel.org, Junwen Wu <wudaemon@....com>
Subject: Re: [PATCH v1] sched/debug: Update print_task formatin
/sys/kernel/debug/sched/debug
Hi Junwen,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tip/sched/core]
[also build test WARNING on peterz-queue/sched/core linus/master v6.7-rc5 next-20231215]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Junwen-Wu/sched-debug-Update-print_task-formatin-sys-kernel-debug-sched-debug/20231216-234714
base: tip/sched/core
patch link: https://lore.kernel.org/r/20231216154412.613443-1-wudaemon%40163.com
patch subject: [PATCH v1] sched/debug: Update print_task formatin /sys/kernel/debug/sched/debug
config: parisc-defconfig (https://download.01.org/0day-ci/archive/20231217/202312171141.Q5MmfuLK-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231217/202312171141.Q5MmfuLK-lkp@intel.com/reproduce)
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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312171141.Q5MmfuLK-lkp@intel.com/
All warnings (new ones prefixed by >>):
kernel/sched/isolation.c:241:22: note: (near initialization for '__setup_housekeeping_isolcpus_setup.setup_func')
241 | __setup("isolcpus=", housekeeping_isolcpus_setup);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/init.h:340:46: note: in definition of macro '__setup_param'
340 | = { __setup_str_##unique_id, fn, early }
| ^~
kernel/sched/isolation.c:241:1: note: in expansion of macro '__setup'
241 | __setup("isolcpus=", housekeeping_isolcpus_setup);
| ^~~~~~~
kernel/sched/build_utility.c:105: error: expected declaration or statement at end of input
105 | #endif
|
kernel/sched/stop_task.c:106:20: warning: unused variable 'stop_sched_class' [-Wunused-variable]
106 | DEFINE_SCHED_CLASS(stop) = {
| ^~~~
kernel/sched/sched.h:2335:26: note: in definition of macro 'DEFINE_SCHED_CLASS'
2335 | const struct sched_class name##_sched_class \
| ^~~~
kernel/sched/debug.c:609:33: warning: unused variable 'p' [-Wunused-variable]
609 | struct task_struct *g, *p;
| ^
kernel/sched/debug.c:609:29: warning: unused variable 'g' [-Wunused-variable]
609 | struct task_struct *g, *p;
| ^
kernel/sched/isolation.c: At top level:
kernel/sched/isolation.c:82:13: warning: 'housekeeping_init' defined but not used [-Wunused-function]
82 | void __init housekeeping_init(void)
| ^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:249:25: warning: '__se_sys_membarrier' defined but not used [-Wunused-function]
249 | asmlinkage long __se_sys##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
| ^~~~~~~~
include/linux/syscalls.h:230:9: note: in expansion of macro '__SYSCALL_DEFINEx'
230 | __SYSCALL_DEFINEx(x, sname, __VA_ARGS__)
| ^~~~~~~~~~~~~~~~~
include/linux/syscalls.h:221:36: note: in expansion of macro 'SYSCALL_DEFINEx'
221 | #define SYSCALL_DEFINE3(name, ...) SYSCALL_DEFINEx(3, _##name, __VA_ARGS__)
| ^~~~~~~~~~~~~~~
kernel/sched/membarrier.c:614:1: note: in expansion of macro 'SYSCALL_DEFINE3'
614 | SYSCALL_DEFINE3(membarrier, int, cmd, unsigned int, flags, int, cpu_id)
| ^~~~~~~~~~~~~~~
kernel/sched/membarrier.c:233:6: warning: 'membarrier_update_current_mm' defined but not used [-Wunused-function]
233 | void membarrier_update_current_mm(struct mm_struct *next_mm)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/membarrier.c:217:6: warning: 'membarrier_exec_mmap' defined but not used [-Wunused-function]
217 | void membarrier_exec_mmap(struct mm_struct *mm)
| ^~~~~~~~~~~~~~~~~~~~
kernel/sched/topology.c:2789:6: warning: 'partition_sched_domains' defined but not used [-Wunused-function]
2789 | void partition_sched_domains(int ndoms_new, cpumask_var_t doms_new[],
| ^~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/topology.c:2599:12: warning: 'sched_init_domains' defined but not used [-Wunused-function]
2599 | int __init sched_init_domains(const struct cpumask *cpu_map)
| ^~~~~~~~~~~~~~~~~~
kernel/sched/topology.c:2276:13: warning: '__sdt_free' defined but not used [-Wunused-function]
2276 | static void __sdt_free(const struct cpumask *cpu_map)
| ^~~~~~~~~~
kernel/sched/topology.c:2207:12: warning: '__sdt_alloc' defined but not used [-Wunused-function]
2207 | static int __sdt_alloc(const struct cpumask *cpu_map)
| ^~~~~~~~~~~
kernel/sched/topology.c:1710:13: warning: 'set_sched_topology' defined but not used [-Wunused-function]
1710 | void __init set_sched_topology(struct sched_domain_topology_level *tl)
| ^~~~~~~~~~~~~~~~~~
kernel/sched/topology.c:585:13: warning: 'init_defrootdomain' defined but not used [-Wunused-function]
585 | void __init init_defrootdomain(void)
| ^~~~~~~~~~~~~~~~~~
kernel/sched/topology.c:531:6: warning: 'sched_put_rd' defined but not used [-Wunused-function]
531 | void sched_put_rd(struct root_domain *rd)
| ^~~~~~~~~~~~
kernel/sched/topology.c:526:6: warning: 'sched_get_rd' defined but not used [-Wunused-function]
526 | void sched_get_rd(struct root_domain *rd)
| ^~~~~~~~~~~~
kernel/sched/cpupri.c:210:6: warning: 'cpupri_set' defined but not used [-Wunused-function]
210 | void cpupri_set(struct cpupri *cp, int cpu, int newpri)
| ^~~~~~~~~~
kernel/sched/cpupri.c:144:5: warning: 'cpupri_find_fitness' defined but not used [-Wunused-function]
144 | int cpupri_find_fitness(struct cpupri *cp, struct task_struct *p,
| ^~~~~~~~~~~~~~~~~~~
kernel/sched/wait.c:209:6: warning: '__wake_up_pollfree' defined but not used [-Wunused-function]
209 | void __wake_up_pollfree(struct wait_queue_head *wq_head)
| ^~~~~~~~~~~~~~~~~~
kernel/sched/wait.c:131:6: warning: '__wake_up_on_current_cpu' defined but not used [-Wunused-function]
131 | void __wake_up_on_current_cpu(struct wait_queue_head *wq_head, unsigned int mode, void *key)
| ^~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/wait_bit.c:245:13: warning: 'wait_bit_init' defined but not used [-Wunused-function]
245 | void __init wait_bit_init(void)
| ^~~~~~~~~~~~~
kernel/sched/swait.c:125:6: warning: '__finish_swait' defined but not used [-Wunused-function]
125 | void __finish_swait(struct swait_queue_head *q, struct swait_queue *wait)
| ^~~~~~~~~~~~~~
kernel/sched/swait.c:41:6: warning: 'swake_up_all_locked' defined but not used [-Wunused-function]
41 | void swake_up_all_locked(struct swait_queue_head *q)
| ^~~~~~~~~~~~~~~~~~~
kernel/sched/completion.c:28:6: warning: 'complete_on_current_cpu' defined but not used [-Wunused-function]
28 | void complete_on_current_cpu(struct completion *x)
| ^~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/loadavg.c:385:6: warning: 'calc_global_load_tick' defined but not used [-Wunused-function]
385 | void calc_global_load_tick(struct rq *this_rq)
| ^~~~~~~~~~~~~~~~~~~~~
kernel/sched/loadavg.c:349:6: warning: 'calc_global_load' defined but not used [-Wunused-function]
349 | void calc_global_load(void)
| ^~~~~~~~~~~~~~~~
>> kernel/sched/loadavg.c:156:1: warning: 'calc_load_n' defined but not used [-Wunused-function]
156 | calc_load_n(unsigned long load, unsigned long exp,
| ^~~~~~~~~~~
kernel/sched/debug.c:607:13: warning: 'print_rq' defined but not used [-Wunused-function]
607 | static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
| ^~~~~~~~
kernel/sched/loadavg.c:71:6: warning: 'get_avenrun' defined but not used [-Wunused-function]
71 | void get_avenrun(unsigned long *loads, unsigned long offset, int shift)
| ^~~~~~~~~~~
kernel/sched/debug.c:575:1: warning: 'print_task' defined but not used [-Wunused-function]
575 | print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
| ^~~~~~~~~~
cc1: some warnings being treated as errors
vim +/calc_load_n +156 kernel/sched/loadavg.c
5c54f5b9edb1aa Johannes Weiner 2018-10-26 131
5c54f5b9edb1aa Johannes Weiner 2018-10-26 132 /*
5c54f5b9edb1aa Johannes Weiner 2018-10-26 133 * a1 = a0 * e + a * (1 - e)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 134 *
5c54f5b9edb1aa Johannes Weiner 2018-10-26 135 * a2 = a1 * e + a * (1 - e)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 136 * = (a0 * e + a * (1 - e)) * e + a * (1 - e)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 137 * = a0 * e^2 + a * (1 - e) * (1 + e)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 138 *
5c54f5b9edb1aa Johannes Weiner 2018-10-26 139 * a3 = a2 * e + a * (1 - e)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 140 * = (a0 * e^2 + a * (1 - e) * (1 + e)) * e + a * (1 - e)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 141 * = a0 * e^3 + a * (1 - e) * (1 + e + e^2)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 142 *
5c54f5b9edb1aa Johannes Weiner 2018-10-26 143 * ...
5c54f5b9edb1aa Johannes Weiner 2018-10-26 144 *
5c54f5b9edb1aa Johannes Weiner 2018-10-26 145 * an = a0 * e^n + a * (1 - e) * (1 + e + ... + e^n-1) [1]
5c54f5b9edb1aa Johannes Weiner 2018-10-26 146 * = a0 * e^n + a * (1 - e) * (1 - e^n)/(1 - e)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 147 * = a0 * e^n + a * (1 - e^n)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 148 *
5c54f5b9edb1aa Johannes Weiner 2018-10-26 149 * [1] application of the geometric series:
5c54f5b9edb1aa Johannes Weiner 2018-10-26 150 *
5c54f5b9edb1aa Johannes Weiner 2018-10-26 151 * n 1 - x^(n+1)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 152 * S_n := \Sum x^i = -------------
5c54f5b9edb1aa Johannes Weiner 2018-10-26 153 * i=0 1 - x
5c54f5b9edb1aa Johannes Weiner 2018-10-26 154 */
5c54f5b9edb1aa Johannes Weiner 2018-10-26 155 unsigned long
5c54f5b9edb1aa Johannes Weiner 2018-10-26 @156 calc_load_n(unsigned long load, unsigned long exp,
5c54f5b9edb1aa Johannes Weiner 2018-10-26 157 unsigned long active, unsigned int n)
5c54f5b9edb1aa Johannes Weiner 2018-10-26 158 {
5c54f5b9edb1aa Johannes Weiner 2018-10-26 159 return calc_load(load, fixed_power_int(exp, FSHIFT, n), active);
5c54f5b9edb1aa Johannes Weiner 2018-10-26 160 }
5c54f5b9edb1aa Johannes Weiner 2018-10-26 161
--
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