From: kernel test robot <lkp@intel.com>
To: Aaron Tomlin <atomlin@atomlin.com>,
akpm@linux-foundation.org, mingo@redhat.com,
peterz@infradead.org, juri.lelli@redhat.com,
vincent.guittot@linaro.org
Cc: oe-kbuild-all@lists.linux.dev, dietmar.eggemann@arm.com,
rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
vschneid@redhat.com, feng.tang@linux.alibaba.com,
pmladek@suse.com, kprateek.nayak@amd.com, atomlin@atomlin.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] sched/debug, sys_info: Introduce SYS_INFO_CPU_RUNQUEUES
Date: Sat, 12 Sep 2026 04:45:18 +0800 [thread overview]
Message-ID: <202609120421.J3jtss6v-lkp@intel.com> (raw)
In-Reply-To: <20260911022844.521413-1-atomlin@atomlin.com>
Hi Aaron,
kernel test robot noticed the following build warnings:
[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on tip/sched/core akpm-mm/mm-nonmm-unstable linus/master v7.3-rc2 next-20260909]
[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/Aaron-Tomlin/sched-debug-sys_info-Introduce-SYS_INFO_CPU_RUNQUEUES/20260910-222844
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20260911022844.521413-1-atomlin%40atomlin.com
patch subject: [PATCH] sched/debug, sys_info: Introduce SYS_INFO_CPU_RUNQUEUES
config: microblaze-randconfig-r132-20260911 (https://download.01.org/0day-ci/archive/20260912/202609120421.J3jtss6v-lkp@intel.com/config)
compiler: microblaze-linux-gcc (GCC) 8.5.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260912/202609120421.J3jtss6v-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609120421.J3jtss6v-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
kernel/sched/build_utility.c: note: in included file:
kernel/sched/debug.c:868:17: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/debug.c:868:17: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/debug.c:868:17: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/debug.c:1220:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/debug.c:1220:9: sparse: expected struct task_struct *tsk
kernel/sched/debug.c:1220:9: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/debug.c:1220:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/debug.c:1220:9: sparse: expected struct task_struct *tsk
kernel/sched/debug.c:1220:9: sparse: got struct task_struct [noderef] __rcu *curr
>> kernel/sched/debug.c:1355:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@
kernel/sched/debug.c:1355:30: sparse: expected struct task_struct *curr
kernel/sched/debug.c:1355:30: sparse: got struct task_struct [noderef] __rcu *curr
>> kernel/sched/debug.c:1360:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu * @@
kernel/sched/debug.c:1360:30: sparse: expected struct task_struct *curr
kernel/sched/debug.c:1360:30: sparse: got struct task_struct [noderef] __rcu *
kernel/sched/build_utility.c: note: in included file:
kernel/sched/topology.c:118:56: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:118:56: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:118:56: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:137:60: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:137:60: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:137:60: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:160:20: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:160:20: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:160:20: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:470:19: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct perf_domain *pd @@ got struct perf_domain [noderef] __rcu *pd @@
kernel/sched/topology.c:470:19: sparse: expected struct perf_domain *pd
kernel/sched/topology.c:470:19: sparse: got struct perf_domain [noderef] __rcu *pd
kernel/sched/topology.c:654:49: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sched_domain *parent @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:654:49: sparse: expected struct sched_domain *parent
kernel/sched/topology.c:654:49: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:753:50: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sched_domain *parent @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:753:50: sparse: expected struct sched_domain *parent
kernel/sched/topology.c:753:50: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:775:55: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain [noderef] __rcu *[noderef] __rcu child @@ got struct sched_domain *[assigned] tmp @@
kernel/sched/topology.c:775:55: sparse: expected struct sched_domain [noderef] __rcu *[noderef] __rcu child
kernel/sched/topology.c:775:55: sparse: got struct sched_domain *[assigned] tmp
kernel/sched/topology.c:788:29: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] tmp @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:788:29: sparse: expected struct sched_domain *[assigned] tmp
kernel/sched/topology.c:788:29: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:793:20: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:793:20: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:793:20: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:826:13: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] tmp @@ got struct sched_domain [noderef] __rcu *sd @@
kernel/sched/topology.c:826:13: sparse: expected struct sched_domain *[assigned] tmp
kernel/sched/topology.c:826:13: sparse: got struct sched_domain [noderef] __rcu *sd
kernel/sched/topology.c:1069:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sched_domain *sdp @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:1069:38: sparse: expected struct sched_domain *sdp
kernel/sched/topology.c:1069:38: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:1076:21: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *sdp @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:1076:21: sparse: expected struct sched_domain *sdp
kernel/sched/topology.c:1076:21: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:1223:70: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:1223:70: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:1223:70: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1252:59: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:1252:59: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:1252:59: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1298:57: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:1298:57: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:1298:57: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1300:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *sibling @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:1300:25: sparse: expected struct sched_domain *sibling
kernel/sched/topology.c:1300:25: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1308:55: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:1308:55: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:1308:55: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1310:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *sibling @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:1310:25: sparse: expected struct sched_domain *sibling
kernel/sched/topology.c:1310:25: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1380:62: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sched_domain *sd @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:1380:62: sparse: expected struct sched_domain *sd
kernel/sched/topology.c:1380:62: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1484:40: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sched_domain *child @@ got struct sched_domain [noderef] __rcu *child @@
kernel/sched/topology.c:1484:40: sparse: expected struct sched_domain *child
kernel/sched/topology.c:1484:40: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1620:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:1620:9: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/topology.c:1620:9: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:1877:52: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:1877:52: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/topology.c:1877:52: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:1987:43: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sched_domain [noderef] __rcu *child @@ got struct sched_domain *child @@
kernel/sched/topology.c:1987:43: sparse: expected struct sched_domain [noderef] __rcu *child
kernel/sched/topology.c:1987:43: sparse: got struct sched_domain *child
kernel/sched/topology.c:2791:31: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain [noderef] __rcu *parent @@ got struct sched_domain *sd @@
kernel/sched/topology.c:2791:31: sparse: expected struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:2791:31: sparse: got struct sched_domain *sd
kernel/sched/topology.c:2919:16: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *parent @@ got struct sched_domain [noderef] __rcu *[noderef] __rcu parent @@
kernel/sched/topology.c:2919:16: sparse: expected struct sched_domain *parent
kernel/sched/topology.c:2919:16: sparse: got struct sched_domain [noderef] __rcu *[noderef] __rcu parent
kernel/sched/topology.c:2921:24: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *parent @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:2921:24: sparse: expected struct sched_domain *parent
kernel/sched/topology.c:2921:24: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:2926:16: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *parent @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:2926:16: sparse: expected struct sched_domain *parent
kernel/sched/topology.c:2926:16: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:2931:24: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *parent @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:2931:24: sparse: expected struct sched_domain *parent
kernel/sched/topology.c:2931:24: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:3008:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd_asym @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:3008:25: sparse: expected struct sched_domain *[assigned] sd_asym
kernel/sched/topology.c:3008:25: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:3143:57: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:3143:57: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/topology.c:3143:57: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:3165:28: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:3165:28: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/topology.c:3165:28: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/topology.c:3191:57: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@
kernel/sched/topology.c:3191:57: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/topology.c:3191:57: sparse: got struct sched_domain [noderef] __rcu *parent
vim +1355 kernel/sched/debug.c
1212
1213 #define PN(x) \
1214 SEQ_printf(m, " .%-30s: %Ld.%06ld\n", #x, SPLIT_NS(rq->x))
1215
1216 P(nr_running);
1217 P(nr_switches);
1218 P(nr_uninterruptible);
1219 PN(next_balance);
> 1220 SEQ_printf(m, " .%-30s: %ld\n", "curr->pid", (long)(task_pid_nr(rq->curr)));
1221 PN(clock);
1222 PN(clock_task);
1223 #undef P
1224 #undef PN
1225
1226 #define P64(n) SEQ_printf(m, " .%-30s: %Ld\n", #n, rq->n);
1227 P64(avg_idle);
1228 P64(max_idle_balance_cost);
1229 #undef P64
1230
1231 #define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, schedstat_val(rq->n));
1232 if (schedstat_enabled()) {
1233 P(yld_count);
1234 P(sched_count);
1235 P(sched_goidle);
1236 P(ttwu_count);
1237 P(ttwu_local);
1238 }
1239 #undef P
1240
1241 print_cfs_stats(m, cpu);
1242 print_rt_stats(m, cpu);
1243 print_dl_stats(m, cpu);
1244
1245 print_rq(m, rq, cpu, true, false);
1246 SEQ_printf(m, "\n");
1247 }
1248
1249 static const char *sched_tunable_scaling_names[] = {
1250 "none",
1251 "logarithmic",
1252 "linear"
1253 };
1254
1255 static void sched_debug_header(struct seq_file *m)
1256 {
1257 u64 ktime, sched_clk, cpu_clk;
1258 unsigned long flags;
1259
1260 local_irq_save(flags);
1261 ktime = ktime_to_ns(ktime_get());
1262 sched_clk = sched_clock();
1263 cpu_clk = local_clock();
1264 local_irq_restore(flags);
1265
1266 SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n",
1267 init_utsname()->release,
1268 (int)strcspn(init_utsname()->version, " "),
1269 init_utsname()->version);
1270
1271 #define P(x) \
1272 SEQ_printf(m, "%-40s: %Ld\n", #x, (long long)(x))
1273 #define PN(x) \
1274 SEQ_printf(m, "%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1275 PN(ktime);
1276 PN(sched_clk);
1277 PN(cpu_clk);
1278 P(jiffies);
1279 #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
1280 P(sched_clock_stable());
1281 #endif
1282 #undef PN
1283 #undef P
1284
1285 SEQ_printf(m, "\n");
1286 SEQ_printf(m, "sysctl_sched\n");
1287
1288 #define P(x) \
1289 SEQ_printf(m, " .%-40s: %Ld\n", #x, (long long)(x))
1290 #define PN(x) \
1291 SEQ_printf(m, " .%-40s: %Ld.%06ld\n", #x, SPLIT_NS(x))
1292 PN(sysctl_sched_base_slice);
1293 P(sysctl_sched_features);
1294 #undef PN
1295 #undef P
1296
1297 SEQ_printf(m, " .%-40s: %d (%s)\n",
1298 "sysctl_sched_tunable_scaling",
1299 sysctl_sched_tunable_scaling,
1300 sched_tunable_scaling_names[sysctl_sched_tunable_scaling]);
1301 SEQ_printf(m, "\n");
1302 }
1303
1304 static int sched_debug_show(struct seq_file *m, void *v)
1305 {
1306 int cpu = (unsigned long)(v - 2);
1307
1308 if (cpu != -1)
1309 print_cpu(m, cpu);
1310 else
1311 sched_debug_header(m);
1312
1313 return 0;
1314 }
1315
1316 void sysrq_sched_debug_show(void)
1317 {
1318 int cpu;
1319
1320 sched_debug_header(NULL);
1321 for_each_online_cpu(cpu) {
1322 /*
1323 * Need to reset softlockup watchdogs on all CPUs, because
1324 * another CPU might be blocked waiting for us to process
1325 * an IPI or stop_machine.
1326 */
1327 touch_nmi_watchdog();
1328 touch_all_softlockup_watchdogs();
1329 print_cpu(NULL, cpu);
1330 }
1331 }
1332
1333 void sched_show_runqueues(void)
1334 {
1335 int cpu;
1336
1337 pr_info("CPU Runqueues:\n");
1338 for_each_online_cpu(cpu) {
1339 struct rq *rq = cpu_rq(cpu);
1340 struct task_struct *curr;
1341 unsigned int nr_running;
1342 u64 nr_switches;
1343 unsigned long flags;
1344 bool locked;
1345
1346 touch_nmi_watchdog();
1347 touch_all_softlockup_watchdogs();
1348
1349 rcu_read_lock();
1350 local_irq_save(flags);
1351 locked = raw_spin_rq_trylock(rq);
1352 if (locked) {
1353 nr_running = rq->nr_running;
1354 nr_switches = rq->nr_switches;
> 1355 curr = rq->curr;
1356 raw_spin_rq_unlock(rq);
1357 } else {
1358 nr_running = READ_ONCE(rq->nr_running);
1359 nr_switches = READ_ONCE(rq->nr_switches);
> 1360 curr = READ_ONCE(rq->curr);
1361 }
1362 local_irq_restore(flags);
1363
1364 pr_info("cpu#%d: nr_running:%u switches:%llu curr:%s[%d]%s\n",
1365 cpu, nr_running, nr_switches,
1366 curr ? curr->comm : "<none>",
1367 curr ? task_pid_nr(curr) : -1,
1368 locked ? "" : " (contended)");
1369
1370 print_rq(NULL, rq, cpu, false, true);
1371 rcu_read_unlock();
1372 }
1373 }
1374
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2026-09-11 20:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-11 2:28 Aaron Tomlin
2026-09-11 20:45 ` kernel test robot [this message]
2026-09-12 1:00 ` Aaron Tomlin
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