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Message-ID: <202506302317.HmsFxI84-lkp@intel.com>
Date: Mon, 30 Jun 2025 23:16:49 +0800
From: kernel test robot <lkp@...el.com>
To: Ingo Molnar <mingo@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
x86@...nel.org
Subject: [tip:sched/core 20/43] kernel/sched/core.c:8216: undefined reference
to `scx_rq_activate'
tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
head: 5bc34be478d09c4d16009e665e020ad0fcd0deea
commit: cac5cefbade90ff0bb0b393d301fa3b5234cf056 [20/43] sched/smp: Make SMP unconditional
config: sparc64-randconfig-001-20250630 (https://download.01.org/0day-ci/archive/20250630/202506302317.HmsFxI84-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250630/202506302317.HmsFxI84-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/202506302317.HmsFxI84-lkp@intel.com/
All errors (new ones prefixed by >>):
sparc64-linux-ld: kernel/sched/core.o: in function `sched_cpu_activate':
>> kernel/sched/core.c:8216: undefined reference to `scx_rq_activate'
sparc64-linux-ld: kernel/sched/core.o: in function `sched_cpu_deactivate':
>> kernel/sched/core.c:8272: undefined reference to `scx_rq_deactivate'
vim +8216 kernel/sched/core.c
31b164e2e4af84 kernel/sched/core.c Yang Yingliang 2024-07-03 8193
40190a78f85fec kernel/sched/core.c Thomas Gleixner 2016-03-10 8194 int sched_cpu_activate(unsigned int cpu)
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8195 {
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8196 struct rq *rq = cpu_rq(cpu);
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8197
22f667c97aadbf kernel/sched/core.c Peter Zijlstra 2021-01-15 8198 /*
b5c4477366fb5e kernel/sched/core.c Peter Zijlstra 2021-01-21 8199 * Clear the balance_push callback and prepare to schedule
b5c4477366fb5e kernel/sched/core.c Peter Zijlstra 2021-01-21 8200 * regular tasks.
22f667c97aadbf kernel/sched/core.c Peter Zijlstra 2021-01-15 8201 */
2558aacff85866 kernel/sched/core.c Peter Zijlstra 2020-09-11 8202 balance_push_set(cpu, false);
2558aacff85866 kernel/sched/core.c Peter Zijlstra 2020-09-11 8203
ba2591a5993eab kernel/sched/core.c Peter Zijlstra 2018-05-29 8204 /*
c5511d03ec0909 kernel/sched/core.c Peter Zijlstra (Intel 2018-11-25 8205) * When going up, increment the number of cores with SMT present.
ba2591a5993eab kernel/sched/core.c Peter Zijlstra 2018-05-29 8206 */
31b164e2e4af84 kernel/sched/core.c Yang Yingliang 2024-07-03 8207 sched_smt_present_inc(cpu);
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8208 set_cpu_active(cpu, true);
40190a78f85fec kernel/sched/core.c Thomas Gleixner 2016-03-10 8209
40190a78f85fec kernel/sched/core.c Thomas Gleixner 2016-03-10 8210 if (sched_smp_initialized) {
0fb3978b0aac3a kernel/sched/core.c Ying Huang 2022-02-14 8211 sched_update_numa(cpu, true);
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8212 sched_domains_numa_masks_set(cpu);
40190a78f85fec kernel/sched/core.c Thomas Gleixner 2016-03-10 8213 cpuset_cpu_active();
e761b772523427 kernel/sched.c Max Krasnyansky 2008-07-15 8214 }
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8215
60c27fb59f6cff kernel/sched/core.c Tejun Heo 2024-06-18 @8216 scx_rq_activate(rq);
60c27fb59f6cff kernel/sched/core.c Tejun Heo 2024-06-18 8217
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8218 /*
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8219 * Put the rq online, if not already. This happens:
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8220 *
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8221 * 1) In the early boot process, because we build the real domains
d1ccc66df8bfe3 kernel/sched/core.c Ingo Molnar 2017-02-01 8222 * after all CPUs have been brought up.
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8223 *
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8224 * 2) At runtime, if cpuset_cpu_active() fails to rebuild the
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8225 * domains.
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8226 */
2f027354122f58 kernel/sched/core.c Yang Yingliang 2024-07-03 8227 sched_set_rq_online(rq, cpu);
7d97669933eb94 kernel/sched/core.c Thomas Gleixner 2016-03-10 8228
40190a78f85fec kernel/sched/core.c Thomas Gleixner 2016-03-10 8229 return 0;
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8230 }
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8231
40190a78f85fec kernel/sched/core.c Thomas Gleixner 2016-03-10 8232 int sched_cpu_deactivate(unsigned int cpu)
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8233 {
120455c514f732 kernel/sched/core.c Peter Zijlstra 2020-09-25 8234 struct rq *rq = cpu_rq(cpu);
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8235 int ret;
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8236
53916d5fd3c0b6 kernel/sched/core.c Juri Lelli 2024-11-15 8237 ret = dl_bw_deactivate(cpu);
53916d5fd3c0b6 kernel/sched/core.c Juri Lelli 2024-11-15 8238
53916d5fd3c0b6 kernel/sched/core.c Juri Lelli 2024-11-15 8239 if (ret)
53916d5fd3c0b6 kernel/sched/core.c Juri Lelli 2024-11-15 8240 return ret;
53916d5fd3c0b6 kernel/sched/core.c Juri Lelli 2024-11-15 8241
e0b257c3b71bd9 kernel/sched/core.c Anna-Maria Behnsen 2020-12-15 8242 /*
e0b257c3b71bd9 kernel/sched/core.c Anna-Maria Behnsen 2020-12-15 8243 * Remove CPU from nohz.idle_cpus_mask to prevent participating in
e0b257c3b71bd9 kernel/sched/core.c Anna-Maria Behnsen 2020-12-15 8244 * load balancing when not active
e0b257c3b71bd9 kernel/sched/core.c Anna-Maria Behnsen 2020-12-15 8245 */
e0b257c3b71bd9 kernel/sched/core.c Anna-Maria Behnsen 2020-12-15 8246 nohz_balance_exit_idle(rq);
e0b257c3b71bd9 kernel/sched/core.c Anna-Maria Behnsen 2020-12-15 8247
135fb3e19773e6 kernel/sched/core.c Thomas Gleixner 2016-03-10 8248 set_cpu_active(cpu, false);
741ba80f6f9a47 kernel/sched/core.c Peter Zijlstra 2021-01-16 8249
741ba80f6f9a47 kernel/sched/core.c Peter Zijlstra 2021-01-16 8250 /*
741ba80f6f9a47 kernel/sched/core.c Peter Zijlstra 2021-01-16 8251 * From this point forward, this CPU will refuse to run any task that
741ba80f6f9a47 kernel/sched/core.c Peter Zijlstra 2021-01-16 8252 * is not: migrate_disable() or KTHREAD_IS_PER_CPU, and will actively
741ba80f6f9a47 kernel/sched/core.c Peter Zijlstra 2021-01-16 8253 * push those tasks away until this gets cleared, see
741ba80f6f9a47 kernel/sched/core.c Peter Zijlstra 2021-01-16 8254 * sched_cpu_dying().
741ba80f6f9a47 kernel/sched/core.c Peter Zijlstra 2021-01-16 8255 */
975707f227b07a kernel/sched/core.c Peter Zijlstra 2021-01-20 8256 balance_push_set(cpu, true);
975707f227b07a kernel/sched/core.c Peter Zijlstra 2021-01-20 8257
b2454caa8977ad kernel/sched/core.c Peter Zijlstra 2016-03-10 8258 /*
975707f227b07a kernel/sched/core.c Peter Zijlstra 2021-01-20 8259 * We've cleared cpu_active_mask / set balance_push, wait for all
975707f227b07a kernel/sched/core.c Peter Zijlstra 2021-01-20 8260 * preempt-disabled and RCU users of this state to go away such that
975707f227b07a kernel/sched/core.c Peter Zijlstra 2021-01-20 8261 * all new such users will observe it.
b2454caa8977ad kernel/sched/core.c Peter Zijlstra 2016-03-10 8262 *
5ba2ffba13a1e2 kernel/sched/core.c Peter Zijlstra 2021-01-12 8263 * Specifically, we rely on ttwu to no longer target this CPU, see
5ba2ffba13a1e2 kernel/sched/core.c Peter Zijlstra 2021-01-12 8264 * ttwu_queue_cond() and is_cpu_allowed().
5ba2ffba13a1e2 kernel/sched/core.c Peter Zijlstra 2021-01-12 8265 *
402de7fc880fef kernel/sched/core.c Ingo Molnar 2024-05-27 8266 * Do sync before park smpboot threads to take care the RCU boost case.
b2454caa8977ad kernel/sched/core.c Peter Zijlstra 2016-03-10 8267 */
309ba859b95085 kernel/sched/core.c Paul E. McKenney 2018-07-11 8268 synchronize_rcu();
40190a78f85fec kernel/sched/core.c Thomas Gleixner 2016-03-10 8269
2f027354122f58 kernel/sched/core.c Yang Yingliang 2024-07-03 8270 sched_set_rq_offline(rq, cpu);
120455c514f732 kernel/sched/core.c Peter Zijlstra 2020-09-25 8271
60c27fb59f6cff kernel/sched/core.c Tejun Heo 2024-06-18 @8272 scx_rq_deactivate(rq);
60c27fb59f6cff kernel/sched/core.c Tejun Heo 2024-06-18 8273
c5511d03ec0909 kernel/sched/core.c Peter Zijlstra (Intel 2018-11-25 8274) /*
c5511d03ec0909 kernel/sched/core.c Peter Zijlstra (Intel 2018-11-25 8275) * When going down, decrement the number of cores with SMT present.
c5511d03ec0909 kernel/sched/core.c Peter Zijlstra (Intel 2018-11-25 8276) */
31b164e2e4af84 kernel/sched/core.c Yang Yingliang 2024-07-03 8277 sched_smt_present_dec(cpu);
3c474b3239f12f kernel/sched/core.c Peter Zijlstra 2021-08-19 8278
:::::: The code at line 8216 was first introduced by commit
:::::: 60c27fb59f6cffa73fc8c60e3a22323c78044576 sched_ext: Implement sched_ext_ops.cpu_online/offline()
:::::: TO: Tejun Heo <tj@...nel.org>
:::::: CC: Tejun Heo <tj@...nel.org>
--
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