kernel/sched/fair.c:9246:81: error: 'select_idle_mask' undeclared; did you mean 'select_idle_cpu'?
From: kernel test robot
Date: Tue Jun 21 2022 - 23:28:15 EST
tree: https://github.com/intel-lab-lkp/linux/commits/Vincent-Donnefort/feec-energy-margin-removal/20220621-170631
head: 2059fff7a5a2b6016ef5843c673845283a00a646
commit: a4a1ec79913664ac49b72cda8c3756c4da7c16b4 sched/fair: Rename select_idle_mask to select_rq_mask
date: 18 hours ago
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20220622/202206221127.ZB5LLKZT-lkp@xxxxxxxxx/config)
compiler: gcc-11 (Debian 11.3.0-3) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/a4a1ec79913664ac49b72cda8c3756c4da7c16b4
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Vincent-Donnefort/feec-energy-margin-removal/20220621-170631
git checkout a4a1ec79913664ac49b72cda8c3756c4da7c16b4
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All errors (new ones prefixed by >>):
In file included from include/asm-generic/percpu.h:7,
from arch/x86/include/asm/percpu.h:390,
from arch/x86/include/asm/current.h:6,
from include/linux/sched.h:12,
from include/linux/ratelimit.h:6,
from include/linux/dev_printk.h:16,
from include/linux/device.h:15,
from include/linux/energy_model.h:5,
from kernel/sched/fair.c:23:
kernel/sched/fair.c: In function 'find_idlest_group':
>> kernel/sched/fair.c:9246:81: error: 'select_idle_mask' undeclared (first use in this function); did you mean 'select_idle_cpu'?
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:219:54: note: in definition of macro '__verify_pcpu_ptr'
219 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^~~
include/linux/cpumask.h:761:37: note: in expansion of macro 'this_cpu_ptr'
761 | #define this_cpu_cpumask_var_ptr(x) this_cpu_ptr(x)
| ^~~~~~~~~~~~
kernel/sched/fair.c:9246:56: note: in expansion of macro 'this_cpu_cpumask_var_ptr'
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~~~~~~~~~
kernel/sched/fair.c:9246:81: note: each undeclared identifier is reported only once for each function it appears in
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~
include/linux/percpu-defs.h:219:54: note: in definition of macro '__verify_pcpu_ptr'
219 | const void __percpu *__vpp_verify = (typeof((ptr) + 0))NULL; \
| ^~~
include/linux/cpumask.h:761:37: note: in expansion of macro 'this_cpu_ptr'
761 | #define this_cpu_cpumask_var_ptr(x) this_cpu_ptr(x)
| ^~~~~~~~~~~~
kernel/sched/fair.c:9246:56: note: in expansion of macro 'this_cpu_cpumask_var_ptr'
9246 | struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
| ^~~~~~~~~~~~~~~~~~~~~~~~
vim +9246 kernel/sched/fair.c
57abff067a08488 Vincent Guittot 2019-10-18 9103
57abff067a08488 Vincent Guittot 2019-10-18 9104 /*
57abff067a08488 Vincent Guittot 2019-10-18 9105 * find_idlest_group() finds and returns the least busy CPU group within the
57abff067a08488 Vincent Guittot 2019-10-18 9106 * domain.
57abff067a08488 Vincent Guittot 2019-10-18 9107 *
57abff067a08488 Vincent Guittot 2019-10-18 9108 * Assumes p is allowed on at least one CPU in sd.
57abff067a08488 Vincent Guittot 2019-10-18 9109 */
57abff067a08488 Vincent Guittot 2019-10-18 9110 static struct sched_group *
45da27732b0b9b7 Valentin Schneider 2020-04-15 9111 find_idlest_group(struct sched_domain *sd, struct task_struct *p, int this_cpu)
57abff067a08488 Vincent Guittot 2019-10-18 9112 {
57abff067a08488 Vincent Guittot 2019-10-18 9113 struct sched_group *idlest = NULL, *local = NULL, *group = sd->groups;
57abff067a08488 Vincent Guittot 2019-10-18 9114 struct sg_lb_stats local_sgs, tmp_sgs;
57abff067a08488 Vincent Guittot 2019-10-18 9115 struct sg_lb_stats *sgs;
57abff067a08488 Vincent Guittot 2019-10-18 9116 unsigned long imbalance;
57abff067a08488 Vincent Guittot 2019-10-18 9117 struct sg_lb_stats idlest_sgs = {
57abff067a08488 Vincent Guittot 2019-10-18 9118 .avg_load = UINT_MAX,
57abff067a08488 Vincent Guittot 2019-10-18 9119 .group_type = group_overloaded,
57abff067a08488 Vincent Guittot 2019-10-18 9120 };
57abff067a08488 Vincent Guittot 2019-10-18 9121
57abff067a08488 Vincent Guittot 2019-10-18 9122 do {
57abff067a08488 Vincent Guittot 2019-10-18 9123 int local_group;
57abff067a08488 Vincent Guittot 2019-10-18 9124
57abff067a08488 Vincent Guittot 2019-10-18 9125 /* Skip over this group if it has no CPUs allowed */
57abff067a08488 Vincent Guittot 2019-10-18 9126 if (!cpumask_intersects(sched_group_span(group),
57abff067a08488 Vincent Guittot 2019-10-18 9127 p->cpus_ptr))
57abff067a08488 Vincent Guittot 2019-10-18 9128 continue;
57abff067a08488 Vincent Guittot 2019-10-18 9129
97886d9dcd86820 Aubrey Li 2021-03-24 9130 /* Skip over this group if no cookie matched */
97886d9dcd86820 Aubrey Li 2021-03-24 9131 if (!sched_group_cookie_match(cpu_rq(this_cpu), p, group))
97886d9dcd86820 Aubrey Li 2021-03-24 9132 continue;
97886d9dcd86820 Aubrey Li 2021-03-24 9133
57abff067a08488 Vincent Guittot 2019-10-18 9134 local_group = cpumask_test_cpu(this_cpu,
57abff067a08488 Vincent Guittot 2019-10-18 9135 sched_group_span(group));
57abff067a08488 Vincent Guittot 2019-10-18 9136
57abff067a08488 Vincent Guittot 2019-10-18 9137 if (local_group) {
57abff067a08488 Vincent Guittot 2019-10-18 9138 sgs = &local_sgs;
57abff067a08488 Vincent Guittot 2019-10-18 9139 local = group;
57abff067a08488 Vincent Guittot 2019-10-18 9140 } else {
57abff067a08488 Vincent Guittot 2019-10-18 9141 sgs = &tmp_sgs;
57abff067a08488 Vincent Guittot 2019-10-18 9142 }
57abff067a08488 Vincent Guittot 2019-10-18 9143
57abff067a08488 Vincent Guittot 2019-10-18 9144 update_sg_wakeup_stats(sd, group, sgs, p);
57abff067a08488 Vincent Guittot 2019-10-18 9145
57abff067a08488 Vincent Guittot 2019-10-18 9146 if (!local_group && update_pick_idlest(idlest, &idlest_sgs, group, sgs)) {
57abff067a08488 Vincent Guittot 2019-10-18 9147 idlest = group;
57abff067a08488 Vincent Guittot 2019-10-18 9148 idlest_sgs = *sgs;
57abff067a08488 Vincent Guittot 2019-10-18 9149 }
57abff067a08488 Vincent Guittot 2019-10-18 9150
57abff067a08488 Vincent Guittot 2019-10-18 9151 } while (group = group->next, group != sd->groups);
57abff067a08488 Vincent Guittot 2019-10-18 9152
57abff067a08488 Vincent Guittot 2019-10-18 9153
57abff067a08488 Vincent Guittot 2019-10-18 9154 /* There is no idlest group to push tasks to */
57abff067a08488 Vincent Guittot 2019-10-18 9155 if (!idlest)
57abff067a08488 Vincent Guittot 2019-10-18 9156 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9157
7ed735c33104f3c Vincent Guittot 2019-12-04 9158 /* The local group has been skipped because of CPU affinity */
7ed735c33104f3c Vincent Guittot 2019-12-04 9159 if (!local)
7ed735c33104f3c Vincent Guittot 2019-12-04 9160 return idlest;
7ed735c33104f3c Vincent Guittot 2019-12-04 9161
57abff067a08488 Vincent Guittot 2019-10-18 9162 /*
57abff067a08488 Vincent Guittot 2019-10-18 9163 * If the local group is idler than the selected idlest group
57abff067a08488 Vincent Guittot 2019-10-18 9164 * don't try and push the task.
57abff067a08488 Vincent Guittot 2019-10-18 9165 */
57abff067a08488 Vincent Guittot 2019-10-18 9166 if (local_sgs.group_type < idlest_sgs.group_type)
57abff067a08488 Vincent Guittot 2019-10-18 9167 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9168
57abff067a08488 Vincent Guittot 2019-10-18 9169 /*
57abff067a08488 Vincent Guittot 2019-10-18 9170 * If the local group is busier than the selected idlest group
57abff067a08488 Vincent Guittot 2019-10-18 9171 * try and push the task.
57abff067a08488 Vincent Guittot 2019-10-18 9172 */
57abff067a08488 Vincent Guittot 2019-10-18 9173 if (local_sgs.group_type > idlest_sgs.group_type)
57abff067a08488 Vincent Guittot 2019-10-18 9174 return idlest;
57abff067a08488 Vincent Guittot 2019-10-18 9175
57abff067a08488 Vincent Guittot 2019-10-18 9176 switch (local_sgs.group_type) {
57abff067a08488 Vincent Guittot 2019-10-18 9177 case group_overloaded:
57abff067a08488 Vincent Guittot 2019-10-18 9178 case group_fully_busy:
5c339005f854fa7 Mel Gorman 2020-11-20 9179
5c339005f854fa7 Mel Gorman 2020-11-20 9180 /* Calculate allowed imbalance based on load */
5c339005f854fa7 Mel Gorman 2020-11-20 9181 imbalance = scale_load_down(NICE_0_LOAD) *
5c339005f854fa7 Mel Gorman 2020-11-20 9182 (sd->imbalance_pct-100) / 100;
5c339005f854fa7 Mel Gorman 2020-11-20 9183
57abff067a08488 Vincent Guittot 2019-10-18 9184 /*
57abff067a08488 Vincent Guittot 2019-10-18 9185 * When comparing groups across NUMA domains, it's possible for
57abff067a08488 Vincent Guittot 2019-10-18 9186 * the local domain to be very lightly loaded relative to the
57abff067a08488 Vincent Guittot 2019-10-18 9187 * remote domains but "imbalance" skews the comparison making
57abff067a08488 Vincent Guittot 2019-10-18 9188 * remote CPUs look much more favourable. When considering
57abff067a08488 Vincent Guittot 2019-10-18 9189 * cross-domain, add imbalance to the load on the remote node
57abff067a08488 Vincent Guittot 2019-10-18 9190 * and consider staying local.
57abff067a08488 Vincent Guittot 2019-10-18 9191 */
57abff067a08488 Vincent Guittot 2019-10-18 9192
57abff067a08488 Vincent Guittot 2019-10-18 9193 if ((sd->flags & SD_NUMA) &&
57abff067a08488 Vincent Guittot 2019-10-18 9194 ((idlest_sgs.avg_load + imbalance) >= local_sgs.avg_load))
57abff067a08488 Vincent Guittot 2019-10-18 9195 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9196
57abff067a08488 Vincent Guittot 2019-10-18 9197 /*
57abff067a08488 Vincent Guittot 2019-10-18 9198 * If the local group is less loaded than the selected
57abff067a08488 Vincent Guittot 2019-10-18 9199 * idlest group don't try and push any tasks.
57abff067a08488 Vincent Guittot 2019-10-18 9200 */
57abff067a08488 Vincent Guittot 2019-10-18 9201 if (idlest_sgs.avg_load >= (local_sgs.avg_load + imbalance))
57abff067a08488 Vincent Guittot 2019-10-18 9202 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9203
57abff067a08488 Vincent Guittot 2019-10-18 9204 if (100 * local_sgs.avg_load <= sd->imbalance_pct * idlest_sgs.avg_load)
57abff067a08488 Vincent Guittot 2019-10-18 9205 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9206 break;
57abff067a08488 Vincent Guittot 2019-10-18 9207
57abff067a08488 Vincent Guittot 2019-10-18 9208 case group_imbalanced:
57abff067a08488 Vincent Guittot 2019-10-18 9209 case group_asym_packing:
57abff067a08488 Vincent Guittot 2019-10-18 9210 /* Those type are not used in the slow wakeup path */
57abff067a08488 Vincent Guittot 2019-10-18 9211 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9212
57abff067a08488 Vincent Guittot 2019-10-18 9213 case group_misfit_task:
57abff067a08488 Vincent Guittot 2019-10-18 9214 /* Select group with the highest max capacity */
57abff067a08488 Vincent Guittot 2019-10-18 9215 if (local->sgc->max_capacity >= idlest->sgc->max_capacity)
57abff067a08488 Vincent Guittot 2019-10-18 9216 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9217 break;
57abff067a08488 Vincent Guittot 2019-10-18 9218
57abff067a08488 Vincent Guittot 2019-10-18 9219 case group_has_spare:
cb29a5c19d2d68a Mel Gorman 2022-05-20 9220 #ifdef CONFIG_NUMA
57abff067a08488 Vincent Guittot 2019-10-18 9221 if (sd->flags & SD_NUMA) {
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9222 int imb_numa_nr = sd->imb_numa_nr;
57abff067a08488 Vincent Guittot 2019-10-18 9223 #ifdef CONFIG_NUMA_BALANCING
57abff067a08488 Vincent Guittot 2019-10-18 9224 int idlest_cpu;
57abff067a08488 Vincent Guittot 2019-10-18 9225 /*
57abff067a08488 Vincent Guittot 2019-10-18 9226 * If there is spare capacity at NUMA, try to select
57abff067a08488 Vincent Guittot 2019-10-18 9227 * the preferred node
57abff067a08488 Vincent Guittot 2019-10-18 9228 */
57abff067a08488 Vincent Guittot 2019-10-18 9229 if (cpu_to_node(this_cpu) == p->numa_preferred_nid)
57abff067a08488 Vincent Guittot 2019-10-18 9230 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9231
57abff067a08488 Vincent Guittot 2019-10-18 9232 idlest_cpu = cpumask_first(sched_group_span(idlest));
57abff067a08488 Vincent Guittot 2019-10-18 9233 if (cpu_to_node(idlest_cpu) == p->numa_preferred_nid)
57abff067a08488 Vincent Guittot 2019-10-18 9234 return idlest;
cb29a5c19d2d68a Mel Gorman 2022-05-20 9235 #endif /* CONFIG_NUMA_BALANCING */
57abff067a08488 Vincent Guittot 2019-10-18 9236 /*
2cfb7a1b031b0e8 Mel Gorman 2022-02-08 9237 * Otherwise, keep the task close to the wakeup source
2cfb7a1b031b0e8 Mel Gorman 2022-02-08 9238 * and improve locality if the number of running tasks
2cfb7a1b031b0e8 Mel Gorman 2022-02-08 9239 * would remain below threshold where an imbalance is
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9240 * allowed while accounting for the possibility the
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9241 * task is pinned to a subset of CPUs. If there is a
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9242 * real need of migration, periodic load balance will
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9243 * take care of it.
57abff067a08488 Vincent Guittot 2019-10-18 9244 */
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9245 if (p->nr_cpus_allowed != NR_CPUS) {
f5b2eeb49991047 K Prateek Nayak 2022-04-07 @9246 struct cpumask *cpus = this_cpu_cpumask_var_ptr(select_idle_mask);
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9247
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9248 cpumask_and(cpus, sched_group_span(local), p->cpus_ptr);
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9249 imb_numa_nr = min(cpumask_weight(cpus), sd->imb_numa_nr);
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9250 }
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9251
cb29a5c19d2d68a Mel Gorman 2022-05-20 9252 imbalance = abs(local_sgs.idle_cpus - idlest_sgs.idle_cpus);
cb29a5c19d2d68a Mel Gorman 2022-05-20 9253 if (!adjust_numa_imbalance(imbalance,
cb29a5c19d2d68a Mel Gorman 2022-05-20 9254 local_sgs.sum_nr_running + 1,
f5b2eeb49991047 K Prateek Nayak 2022-04-07 9255 imb_numa_nr)) {
57abff067a08488 Vincent Guittot 2019-10-18 9256 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9257 }
cb29a5c19d2d68a Mel Gorman 2022-05-20 9258 }
cb29a5c19d2d68a Mel Gorman 2022-05-20 9259 #endif /* CONFIG_NUMA */
57abff067a08488 Vincent Guittot 2019-10-18 9260
57abff067a08488 Vincent Guittot 2019-10-18 9261 /*
57abff067a08488 Vincent Guittot 2019-10-18 9262 * Select group with highest number of idle CPUs. We could also
57abff067a08488 Vincent Guittot 2019-10-18 9263 * compare the utilization which is more stable but it can end
57abff067a08488 Vincent Guittot 2019-10-18 9264 * up that the group has less spare capacity but finally more
57abff067a08488 Vincent Guittot 2019-10-18 9265 * idle CPUs which means more opportunity to run task.
57abff067a08488 Vincent Guittot 2019-10-18 9266 */
57abff067a08488 Vincent Guittot 2019-10-18 9267 if (local_sgs.idle_cpus >= idlest_sgs.idle_cpus)
57abff067a08488 Vincent Guittot 2019-10-18 9268 return NULL;
57abff067a08488 Vincent Guittot 2019-10-18 9269 break;
57abff067a08488 Vincent Guittot 2019-10-18 9270 }
57abff067a08488 Vincent Guittot 2019-10-18 9271
57abff067a08488 Vincent Guittot 2019-10-18 9272 return idlest;
57abff067a08488 Vincent Guittot 2019-10-18 9273 }
57abff067a08488 Vincent Guittot 2019-10-18 9274
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