Lines Matching full:cs
135 struct cpuset *cs = task_cs(p); in inc_dl_tasks_cs() local
137 cs->nr_deadline_tasks++; in inc_dl_tasks_cs()
142 struct cpuset *cs = task_cs(p); in dec_dl_tasks_cs() local
144 cs->nr_deadline_tasks--; in dec_dl_tasks_cs()
147 static inline int is_partition_valid(const struct cpuset *cs) in is_partition_valid() argument
149 return cs->partition_root_state > 0; in is_partition_valid()
152 static inline int is_partition_invalid(const struct cpuset *cs) in is_partition_invalid() argument
154 return cs->partition_root_state < 0; in is_partition_invalid()
160 static inline void make_partition_invalid(struct cpuset *cs) in make_partition_invalid() argument
162 if (cs->partition_root_state > 0) in make_partition_invalid()
163 cs->partition_root_state = -cs->partition_root_state; in make_partition_invalid()
169 static inline void notify_partition_change(struct cpuset *cs, int old_prs) in notify_partition_change() argument
171 if (old_prs == cs->partition_root_state) in notify_partition_change()
173 cgroup_file_notify(&cs->partition_file); in notify_partition_change()
176 if (is_partition_valid(cs)) in notify_partition_change()
177 WRITE_ONCE(cs->prs_err, PERR_NONE); in notify_partition_change()
267 * decrease cs->attach_in_progress.
268 * wake_up cpuset_attach_wq if cs->attach_in_progress==0.
270 static inline void dec_attach_in_progress_locked(struct cpuset *cs) in dec_attach_in_progress_locked() argument
274 cs->attach_in_progress--; in dec_attach_in_progress_locked()
275 if (!cs->attach_in_progress) in dec_attach_in_progress_locked()
279 static inline void dec_attach_in_progress(struct cpuset *cs) in dec_attach_in_progress() argument
282 dec_attach_in_progress_locked(cs); in dec_attach_in_progress()
302 * @cs: partition root to be checked
306 * It is assumed that @cs is a valid partition root. @excluded_child should
309 static inline bool partition_is_populated(struct cpuset *cs, in partition_is_populated() argument
315 if (cs->css.cgroup->nr_populated_csets) in partition_is_populated()
317 if (!excluded_child && !cs->nr_subparts) in partition_is_populated()
318 return cgroup_is_populated(cs->css.cgroup); in partition_is_populated()
321 cpuset_for_each_child(child, css, cs) { in partition_is_populated()
350 struct cpuset *cs; in guarantee_online_cpus() local
356 cs = task_cs(tsk); in guarantee_online_cpus()
358 while (!cpumask_intersects(cs->effective_cpus, pmask)) in guarantee_online_cpus()
359 cs = parent_cs(cs); in guarantee_online_cpus()
361 cpumask_and(pmask, pmask, cs->effective_cpus); in guarantee_online_cpus()
376 static void guarantee_online_mems(struct cpuset *cs, nodemask_t *pmask) in guarantee_online_mems() argument
378 while (!nodes_intersects(cs->effective_mems, node_states[N_MEMORY])) in guarantee_online_mems()
379 cs = parent_cs(cs); in guarantee_online_mems()
380 nodes_and(*pmask, cs->effective_mems, node_states[N_MEMORY]); in guarantee_online_mems()
385 * @cs: the cpuset that have cpumasks to be allocated.
391 static inline int alloc_cpumasks(struct cpuset *cs, struct tmpmasks *tmp) in alloc_cpumasks() argument
395 if (cs) { in alloc_cpumasks()
396 pmask1 = &cs->cpus_allowed; in alloc_cpumasks()
397 pmask2 = &cs->effective_cpus; in alloc_cpumasks()
398 pmask3 = &cs->effective_xcpus; in alloc_cpumasks()
399 pmask4 = &cs->exclusive_cpus; in alloc_cpumasks()
433 * @cs: the cpuset that have cpumasks to be free.
436 static inline void free_cpumasks(struct cpuset *cs, struct tmpmasks *tmp) in free_cpumasks() argument
438 if (cs) { in free_cpumasks()
439 free_cpumask_var(cs->cpus_allowed); in free_cpumasks()
440 free_cpumask_var(cs->effective_cpus); in free_cpumasks()
441 free_cpumask_var(cs->effective_xcpus); in free_cpumasks()
442 free_cpumask_var(cs->exclusive_cpus); in free_cpumasks()
453 * @cs: the cpuset that the trial cpuset duplicates
455 static struct cpuset *alloc_trial_cpuset(struct cpuset *cs) in alloc_trial_cpuset() argument
459 trial = kmemdup(cs, sizeof(*cs), GFP_KERNEL); in alloc_trial_cpuset()
468 cpumask_copy(trial->cpus_allowed, cs->cpus_allowed); in alloc_trial_cpuset()
469 cpumask_copy(trial->effective_cpus, cs->effective_cpus); in alloc_trial_cpuset()
470 cpumask_copy(trial->effective_xcpus, cs->effective_xcpus); in alloc_trial_cpuset()
471 cpumask_copy(trial->exclusive_cpus, cs->exclusive_cpus); in alloc_trial_cpuset()
477 * @cs: the cpuset to be freed
479 static inline void free_cpuset(struct cpuset *cs) in free_cpuset() argument
481 free_cpumasks(cs, NULL); in free_cpuset()
482 kfree(cs); in free_cpuset()
486 static inline struct cpumask *user_xcpus(struct cpuset *cs) in user_xcpus() argument
488 return cpumask_empty(cs->exclusive_cpus) ? cs->cpus_allowed in user_xcpus()
489 : cs->exclusive_cpus; in user_xcpus()
492 static inline bool xcpus_empty(struct cpuset *cs) in xcpus_empty() argument
494 return cpumask_empty(cs->cpus_allowed) && in xcpus_empty()
495 cpumask_empty(cs->exclusive_cpus); in xcpus_empty()
910 static void dl_update_tasks_root_domain(struct cpuset *cs) in dl_update_tasks_root_domain() argument
915 if (cs->nr_deadline_tasks == 0) in dl_update_tasks_root_domain()
918 css_task_iter_start(&cs->css, 0, &it); in dl_update_tasks_root_domain()
928 struct cpuset *cs = NULL; in dl_rebuild_rd_accounting() local
943 cpuset_for_each_descendant_pre(cs, pos_css, &top_cpuset) { in dl_rebuild_rd_accounting()
945 if (cpumask_empty(cs->effective_cpus)) { in dl_rebuild_rd_accounting()
950 css_get(&cs->css); in dl_rebuild_rd_accounting()
954 dl_update_tasks_root_domain(cs); in dl_rebuild_rd_accounting()
957 css_put(&cs->css); in dl_rebuild_rd_accounting()
988 struct cpuset *cs; in rebuild_sched_domains_locked() local
1014 cpuset_for_each_descendant_pre(cs, pos_css, &top_cpuset) { in rebuild_sched_domains_locked()
1015 if (!is_partition_valid(cs)) { in rebuild_sched_domains_locked()
1019 if (!cpumask_subset(cs->effective_cpus, in rebuild_sched_domains_locked()
1056 * @cs: the cpuset in which each task's cpus_allowed mask needs to be changed
1059 * Iterate through each task of @cs updating its cpus_allowed to the
1065 void cpuset_update_tasks_cpumask(struct cpuset *cs, struct cpumask *new_cpus) in cpuset_update_tasks_cpumask() argument
1069 bool top_cs = cs == &top_cpuset; in cpuset_update_tasks_cpumask()
1071 css_task_iter_start(&cs->css, 0, &it); in cpuset_update_tasks_cpumask()
1083 cpumask_and(new_cpus, possible_mask, cs->effective_cpus); in cpuset_update_tasks_cpumask()
1093 * @cs: the cpuset the need to recompute the new effective_cpus mask
1099 struct cpuset *cs, struct cpuset *parent) in compute_effective_cpumask() argument
1101 cpumask_and(new_cpus, cs->cpus_allowed, parent->effective_cpus); in compute_effective_cpumask()
1115 static void update_sibling_cpumasks(struct cpuset *parent, struct cpuset *cs,
1123 static int update_partition_exclusive(struct cpuset *cs, int new_prs) in update_partition_exclusive() argument
1127 if (exclusive && !is_cpu_exclusive(cs)) { in update_partition_exclusive()
1128 if (cpuset_update_flag(CS_CPU_EXCLUSIVE, cs, 1)) in update_partition_exclusive()
1130 } else if (!exclusive && is_cpu_exclusive(cs)) { in update_partition_exclusive()
1132 cpuset_update_flag(CS_CPU_EXCLUSIVE, cs, 0); in update_partition_exclusive()
1144 static void update_partition_sd_lb(struct cpuset *cs, int old_prs) in update_partition_sd_lb() argument
1146 int new_prs = cs->partition_root_state; in update_partition_sd_lb()
1151 * If cs is not a valid partition root, the load balance state in update_partition_sd_lb()
1157 new_lb = is_sched_load_balance(parent_cs(cs)); in update_partition_sd_lb()
1159 if (new_lb != !!is_sched_load_balance(cs)) { in update_partition_sd_lb()
1162 set_bit(CS_SCHED_LOAD_BALANCE, &cs->flags); in update_partition_sd_lb()
1164 clear_bit(CS_SCHED_LOAD_BALANCE, &cs->flags); in update_partition_sd_lb()
1174 static bool tasks_nocpu_error(struct cpuset *parent, struct cpuset *cs, in tasks_nocpu_error() argument
1178 * A populated partition (cs or parent) can't have empty effective_cpus in tasks_nocpu_error()
1181 partition_is_populated(parent, cs)) || in tasks_nocpu_error()
1183 partition_is_populated(cs, NULL)); in tasks_nocpu_error()
1186 static void reset_partition_data(struct cpuset *cs) in reset_partition_data() argument
1188 struct cpuset *parent = parent_cs(cs); in reset_partition_data()
1195 cs->nr_subparts = 0; in reset_partition_data()
1196 if (cpumask_empty(cs->exclusive_cpus)) { in reset_partition_data()
1197 cpumask_clear(cs->effective_xcpus); in reset_partition_data()
1198 if (is_cpu_exclusive(cs)) in reset_partition_data()
1199 clear_bit(CS_CPU_EXCLUSIVE, &cs->flags); in reset_partition_data()
1201 if (!cpumask_and(cs->effective_cpus, parent->effective_cpus, cs->cpus_allowed)) in reset_partition_data()
1202 cpumask_copy(cs->effective_cpus, parent->effective_cpus); in reset_partition_data()
1310 * @cs: cpuset
1317 static bool compute_effective_exclusive_cpumask(struct cpuset *cs, in compute_effective_exclusive_cpumask() argument
1320 struct cpuset *parent = parent_cs(cs); in compute_effective_exclusive_cpumask()
1323 xcpus = cs->effective_xcpus; in compute_effective_exclusive_cpumask()
1325 return cpumask_and(xcpus, user_xcpus(cs), parent->effective_xcpus); in compute_effective_exclusive_cpumask()
1328 static inline bool is_remote_partition(struct cpuset *cs) in is_remote_partition() argument
1330 return !list_empty(&cs->remote_sibling); in is_remote_partition()
1333 static inline bool is_local_partition(struct cpuset *cs) in is_local_partition() argument
1335 return is_partition_valid(cs) && !is_remote_partition(cs); in is_local_partition()
1340 * @cs: the cpuset to update
1348 static int remote_partition_enable(struct cpuset *cs, int new_prs, in remote_partition_enable() argument
1367 compute_effective_exclusive_cpumask(cs, tmp->new_cpus); in remote_partition_enable()
1375 list_add(&cs->remote_sibling, &remote_children); in remote_partition_enable()
1389 * @cs: the cpuset to update
1396 static void remote_partition_disable(struct cpuset *cs, struct tmpmasks *tmp) in remote_partition_disable() argument
1400 compute_effective_exclusive_cpumask(cs, tmp->new_cpus); in remote_partition_disable()
1401 WARN_ON_ONCE(!is_remote_partition(cs)); in remote_partition_disable()
1405 list_del_init(&cs->remote_sibling); in remote_partition_disable()
1406 isolcpus_updated = partition_xcpus_del(cs->partition_root_state, in remote_partition_disable()
1408 cs->partition_root_state = -cs->partition_root_state; in remote_partition_disable()
1409 if (!cs->prs_err) in remote_partition_disable()
1410 cs->prs_err = PERR_INVCPUS; in remote_partition_disable()
1411 reset_partition_data(cs); in remote_partition_disable()
1424 * @cs: the cpuset to be updated
1431 static void remote_cpus_update(struct cpuset *cs, struct cpumask *newmask, in remote_cpus_update() argument
1435 int prs = cs->partition_root_state; in remote_cpus_update()
1438 if (WARN_ON_ONCE(!is_remote_partition(cs))) in remote_cpus_update()
1441 WARN_ON_ONCE(!cpumask_subset(cs->effective_xcpus, subpartitions_cpus)); in remote_cpus_update()
1446 adding = cpumask_andnot(tmp->addmask, newmask, cs->effective_xcpus); in remote_cpus_update()
1447 deleting = cpumask_andnot(tmp->delmask, cs->effective_xcpus, newmask); in remote_cpus_update()
1475 remote_partition_disable(cs, tmp); in remote_cpus_update()
1480 * @cs: the cpuset to be updated
1485 * This should be called before the given cs has updated its cpus_allowed
1488 static void remote_partition_check(struct cpuset *cs, struct cpumask *newmask, in remote_partition_check() argument
1497 if (!cpumask_andnot(delmask, cs->effective_xcpus, newmask) || in remote_partition_check()
1541 * @cs: The cpuset that requests change in partition root state
1576 static int update_parent_effective_cpumask(struct cpuset *cs, int cmd, in update_parent_effective_cpumask() argument
1580 struct cpuset *parent = parent_cs(cs); in update_parent_effective_cpumask()
1586 struct cpumask *xcpus; /* cs effective_xcpus */ in update_parent_effective_cpumask()
1597 old_prs = new_prs = cs->partition_root_state; in update_parent_effective_cpumask()
1598 xcpus = user_xcpus(cs); in update_parent_effective_cpumask()
1626 if (!newmask && xcpus_empty(cs)) in update_parent_effective_cpumask()
1629 nocpu = tasks_nocpu_error(parent, cs, xcpus); in update_parent_effective_cpumask()
1673 /* Check newmask again, whether cpus are available for parent/cs */ in update_parent_effective_cpumask()
1674 nocpu |= tasks_nocpu_error(parent, cs, newmask); in update_parent_effective_cpumask()
1733 if (is_partition_valid(cs)) in update_parent_effective_cpumask()
1736 } else if (is_partition_invalid(cs) && in update_parent_effective_cpumask()
1748 if (child == cs) in update_parent_effective_cpumask()
1750 if (!cpusets_are_exclusive(cs, child)) { in update_parent_effective_cpumask()
1766 WRITE_ONCE(cs->prs_err, part_error); in update_parent_effective_cpumask()
1773 switch (cs->partition_root_state) { in update_parent_effective_cpumask()
1798 * CPU lists in cs haven't been updated yet. So defer it to later. in update_parent_effective_cpumask()
1801 int err = update_partition_exclusive(cs, new_prs); in update_parent_effective_cpumask()
1816 cs->partition_root_state = new_prs; in update_parent_effective_cpumask()
1818 cs->nr_subparts = 0; in update_parent_effective_cpumask()
1821 * Adding to parent's effective_cpus means deletion CPUs from cs in update_parent_effective_cpumask()
1839 update_partition_exclusive(cs, new_prs); in update_parent_effective_cpumask()
1843 update_sibling_cpumasks(parent, cs, tmp); in update_parent_effective_cpumask()
1852 update_partition_sd_lb(cs, old_prs); in update_parent_effective_cpumask()
1854 notify_partition_change(cs, old_prs); in update_parent_effective_cpumask()
1860 * @cs: partition root cpuset
1874 static void compute_partition_effective_cpumask(struct cpuset *cs, in compute_partition_effective_cpumask() argument
1879 bool populated = partition_is_populated(cs, NULL); in compute_partition_effective_cpumask()
1889 compute_effective_exclusive_cpumask(cs, new_ecpus); in compute_partition_effective_cpumask()
1893 cpuset_for_each_child(child, css, cs) { in compute_partition_effective_cpumask()
1899 cs->effective_xcpus)) in compute_partition_effective_cpumask()
1913 cs->nr_subparts--; in compute_partition_effective_cpumask()
1933 * @cs: the cpuset to consider
1944 static void update_cpumasks_hier(struct cpuset *cs, struct tmpmasks *tmp, in update_cpumasks_hier() argument
1953 cpuset_for_each_descendant_pre(cp, pos_css, cs) { in update_cpumasks_hier()
1960 * directly from top cpuset unless it is cs. in update_cpumasks_hier()
1962 if (remote && (cp != cs)) { in update_cpumasks_hier()
1971 if (!cpumask_empty(cp->exclusive_cpus) && (cp != cs)) { in update_cpumasks_hier()
2024 * for cs already in update_cpumask(). We should also call in update_cpumasks_hier()
2028 if ((cp != cs) && old_prs) { in update_cpumasks_hier()
2123 * @cs: Current cpuset
2126 static void update_sibling_cpumasks(struct cpuset *parent, struct cpuset *cs, in update_sibling_cpumasks() argument
2150 if (sibling == cs) in update_sibling_cpumasks()
2171 * @cs: the cpuset to consider
2175 static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs, in update_cpumask() argument
2180 struct cpuset *parent = parent_cs(cs); in update_cpumask()
2183 int old_prs = cs->partition_root_state; in update_cpumask()
2186 if (cs == &top_cpuset) in update_cpumask()
2214 if (!cpumask_empty(trialcs->exclusive_cpus) || is_partition_valid(cs)) in update_cpumask()
2219 if (cpumask_equal(cs->cpus_allowed, trialcs->cpus_allowed)) in update_cpumask()
2226 if (is_partition_valid(cs) && in update_cpumask()
2229 cs->prs_err = PERR_INVCPUS; in update_cpumask()
2232 cs->prs_err = PERR_HKEEPING; in update_cpumask()
2233 } else if (tasks_nocpu_error(parent, cs, trialcs->effective_xcpus)) { in update_cpumask()
2235 cs->prs_err = PERR_NOCPUS; in update_cpumask()
2243 if (!cpumask_equal(cs->effective_xcpus, trialcs->effective_xcpus)) in update_cpumask()
2246 retval = validate_change(cs, trialcs); in update_cpumask()
2278 if (is_partition_valid(cs) || in update_cpumask()
2279 (is_partition_invalid(cs) && !invalidate)) { in update_cpumask()
2282 if (cpumask_empty(xcpus) && is_partition_invalid(cs)) in update_cpumask()
2288 if (is_remote_partition(cs)) in update_cpumask()
2289 remote_cpus_update(cs, xcpus, &tmp); in update_cpumask()
2291 update_parent_effective_cpumask(cs, partcmd_invalidate, in update_cpumask()
2294 update_parent_effective_cpumask(cs, partcmd_update, in update_cpumask()
2296 } else if (!cpumask_empty(cs->exclusive_cpus)) { in update_cpumask()
2300 remote_partition_check(cs, trialcs->effective_xcpus, in update_cpumask()
2305 cpumask_copy(cs->cpus_allowed, trialcs->cpus_allowed); in update_cpumask()
2306 cpumask_copy(cs->effective_xcpus, trialcs->effective_xcpus); in update_cpumask()
2307 if ((old_prs > 0) && !is_partition_valid(cs)) in update_cpumask()
2308 reset_partition_data(cs); in update_cpumask()
2312 update_cpumasks_hier(cs, &tmp, hier_flags); in update_cpumask()
2315 if (cs->partition_root_state) in update_cpumask()
2316 update_partition_sd_lb(cs, old_prs); in update_cpumask()
2324 * @cs: the cpuset to consider
2328 * The tasks' cpumask will be updated if cs is a valid partition root.
2330 static int update_exclusive_cpumask(struct cpuset *cs, struct cpuset *trialcs, in update_exclusive_cpumask() argument
2335 struct cpuset *parent = parent_cs(cs); in update_exclusive_cpumask()
2338 int old_prs = cs->partition_root_state; in update_exclusive_cpumask()
2350 if (cpumask_equal(cs->exclusive_cpus, trialcs->exclusive_cpus)) in update_exclusive_cpumask()
2360 if (!cpumask_equal(cs->effective_xcpus, trialcs->effective_xcpus)) in update_exclusive_cpumask()
2363 retval = validate_change(cs, trialcs); in update_exclusive_cpumask()
2373 cs->prs_err = PERR_INVCPUS; in update_exclusive_cpumask()
2376 cs->prs_err = PERR_HKEEPING; in update_exclusive_cpumask()
2377 } else if (tasks_nocpu_error(parent, cs, trialcs->effective_xcpus)) { in update_exclusive_cpumask()
2379 cs->prs_err = PERR_NOCPUS; in update_exclusive_cpumask()
2382 if (is_remote_partition(cs)) { in update_exclusive_cpumask()
2384 remote_partition_disable(cs, &tmp); in update_exclusive_cpumask()
2386 remote_cpus_update(cs, trialcs->effective_xcpus, in update_exclusive_cpumask()
2389 update_parent_effective_cpumask(cs, partcmd_invalidate, in update_exclusive_cpumask()
2392 update_parent_effective_cpumask(cs, partcmd_update, in update_exclusive_cpumask()
2399 remote_partition_check(cs, trialcs->effective_xcpus, in update_exclusive_cpumask()
2403 cpumask_copy(cs->exclusive_cpus, trialcs->exclusive_cpus); in update_exclusive_cpumask()
2404 cpumask_copy(cs->effective_xcpus, trialcs->effective_xcpus); in update_exclusive_cpumask()
2405 if ((old_prs > 0) && !is_partition_valid(cs)) in update_exclusive_cpumask()
2406 reset_partition_data(cs); in update_exclusive_cpumask()
2414 if (is_partition_valid(cs) || hier_flags) in update_exclusive_cpumask()
2415 update_cpumasks_hier(cs, &tmp, hier_flags); in update_exclusive_cpumask()
2418 if (cs->partition_root_state) in update_exclusive_cpumask()
2419 update_partition_sd_lb(cs, old_prs); in update_exclusive_cpumask()
2510 * @cs: the cpuset in which each task's mems_allowed mask needs to be changed
2512 * Iterate through each task of @cs updating its mems_allowed to the
2516 void cpuset_update_tasks_nodemask(struct cpuset *cs) in cpuset_update_tasks_nodemask() argument
2522 cpuset_being_rebound = cs; /* causes mpol_dup() rebind */ in cpuset_update_tasks_nodemask()
2524 guarantee_online_mems(cs, &newmems); in cpuset_update_tasks_nodemask()
2536 css_task_iter_start(&cs->css, 0, &it); in cpuset_update_tasks_nodemask()
2547 migrate = is_memory_migrate(cs); in cpuset_update_tasks_nodemask()
2549 mpol_rebind_mm(mm, &cs->mems_allowed); in cpuset_update_tasks_nodemask()
2551 cpuset_migrate_mm(mm, &cs->old_mems_allowed, &newmems); in cpuset_update_tasks_nodemask()
2559 * cs->old_mems_allowed. in cpuset_update_tasks_nodemask()
2561 cs->old_mems_allowed = newmems; in cpuset_update_tasks_nodemask()
2569 * @cs: the cpuset to consider
2579 static void update_nodemasks_hier(struct cpuset *cs, nodemask_t *new_mems) in update_nodemasks_hier() argument
2585 cpuset_for_each_descendant_pre(cp, pos_css, cs) { in update_nodemasks_hier()
2631 * Will take tasklist_lock, scan tasklist for tasks in cpuset cs,
2635 static int update_nodemask(struct cpuset *cs, struct cpuset *trialcs, in update_nodemask() argument
2644 if (cs == &top_cpuset) { in update_nodemask()
2669 if (nodes_equal(cs->mems_allowed, trialcs->mems_allowed)) { in update_nodemask()
2673 retval = validate_change(cs, trialcs); in update_nodemask()
2680 cs->mems_allowed = trialcs->mems_allowed; in update_nodemask()
2684 update_nodemasks_hier(cs, &trialcs->mems_allowed); in update_nodemask()
2703 * cs: the cpuset to update
2709 int cpuset_update_flag(cpuset_flagbits_t bit, struct cpuset *cs, in cpuset_update_flag() argument
2717 trialcs = alloc_trial_cpuset(cs); in cpuset_update_flag()
2726 err = validate_change(cs, trialcs); in cpuset_update_flag()
2730 balance_flag_changed = (is_sched_load_balance(cs) != in cpuset_update_flag()
2733 spread_flag_changed = ((is_spread_slab(cs) != is_spread_slab(trialcs)) in cpuset_update_flag()
2734 || (is_spread_page(cs) != is_spread_page(trialcs))); in cpuset_update_flag()
2737 cs->flags = trialcs->flags; in cpuset_update_flag()
2745 cpuset1_update_tasks_flags(cs); in cpuset_update_flag()
2753 * @cs: the cpuset to update
2759 static int update_prstate(struct cpuset *cs, int new_prs) in update_prstate() argument
2761 int err = PERR_NONE, old_prs = cs->partition_root_state; in update_prstate()
2762 struct cpuset *parent = parent_cs(cs); in update_prstate()
2782 if ((new_prs > 0) && cpumask_empty(cs->exclusive_cpus)) { in update_prstate()
2784 cpumask_and(cs->effective_xcpus, in update_prstate()
2785 cs->cpus_allowed, parent->effective_xcpus); in update_prstate()
2789 err = update_partition_exclusive(cs, new_prs); in update_prstate()
2797 if (xcpus_empty(cs)) { in update_prstate()
2810 err = update_parent_effective_cpumask(cs, cmd, NULL, &tmpmask); in update_prstate()
2812 err = remote_partition_enable(cs, new_prs, &tmpmask); in update_prstate()
2824 if (is_remote_partition(cs)) in update_prstate()
2825 remote_partition_disable(cs, &tmpmask); in update_prstate()
2827 update_parent_effective_cpumask(cs, partcmd_disable, in update_prstate()
2842 update_partition_exclusive(cs, new_prs); in update_prstate()
2846 cs->partition_root_state = new_prs; in update_prstate()
2847 WRITE_ONCE(cs->prs_err, err); in update_prstate()
2848 if (!is_partition_valid(cs)) in update_prstate()
2849 reset_partition_data(cs); in update_prstate()
2851 partition_xcpus_newstate(old_prs, new_prs, cs->effective_xcpus); in update_prstate()
2856 update_cpumasks_hier(cs, &tmpmask, !new_prs ? HIER_CHECKALL : 0); in update_prstate()
2859 update_partition_sd_lb(cs, old_prs); in update_prstate()
2861 notify_partition_change(cs, old_prs); in update_prstate()
2874 static int cpuset_can_attach_check(struct cpuset *cs) in cpuset_can_attach_check() argument
2876 if (cpumask_empty(cs->effective_cpus) || in cpuset_can_attach_check()
2877 (!is_in_v2_mode() && nodes_empty(cs->mems_allowed))) in cpuset_can_attach_check()
2882 static void reset_migrate_dl_data(struct cpuset *cs) in reset_migrate_dl_data() argument
2884 cs->nr_migrate_dl_tasks = 0; in reset_migrate_dl_data()
2885 cs->sum_migrate_dl_bw = 0; in reset_migrate_dl_data()
2892 struct cpuset *cs, *oldcs; in cpuset_can_attach() local
2900 cs = css_cs(css); in cpuset_can_attach()
2905 ret = cpuset_can_attach_check(cs); in cpuset_can_attach()
2909 cpus_updated = !cpumask_equal(cs->effective_cpus, oldcs->effective_cpus); in cpuset_can_attach()
2910 mems_updated = !nodes_equal(cs->effective_mems, oldcs->effective_mems); in cpuset_can_attach()
2930 cs->nr_migrate_dl_tasks++; in cpuset_can_attach()
2931 cs->sum_migrate_dl_bw += task->dl.dl_bw; in cpuset_can_attach()
2935 if (!cs->nr_migrate_dl_tasks) in cpuset_can_attach()
2938 if (!cpumask_intersects(oldcs->effective_cpus, cs->effective_cpus)) { in cpuset_can_attach()
2939 int cpu = cpumask_any_and(cpu_active_mask, cs->effective_cpus); in cpuset_can_attach()
2942 reset_migrate_dl_data(cs); in cpuset_can_attach()
2947 ret = dl_bw_alloc(cpu, cs->sum_migrate_dl_bw); in cpuset_can_attach()
2949 reset_migrate_dl_data(cs); in cpuset_can_attach()
2959 cs->attach_in_progress++; in cpuset_can_attach()
2968 struct cpuset *cs; in cpuset_cancel_attach() local
2971 cs = css_cs(css); in cpuset_cancel_attach()
2974 dec_attach_in_progress_locked(cs); in cpuset_cancel_attach()
2976 if (cs->nr_migrate_dl_tasks) { in cpuset_cancel_attach()
2977 int cpu = cpumask_any(cs->effective_cpus); in cpuset_cancel_attach()
2979 dl_bw_free(cpu, cs->sum_migrate_dl_bw); in cpuset_cancel_attach()
2980 reset_migrate_dl_data(cs); in cpuset_cancel_attach()
2994 static void cpuset_attach_task(struct cpuset *cs, struct task_struct *task) in cpuset_attach_task() argument
2998 if (cs != &top_cpuset) in cpuset_attach_task()
3010 cpuset1_update_task_spread_flags(cs, task); in cpuset_attach_task()
3018 struct cpuset *cs; in cpuset_attach() local
3023 cs = css_cs(css); in cpuset_attach()
3027 cpus_updated = !cpumask_equal(cs->effective_cpus, in cpuset_attach()
3029 mems_updated = !nodes_equal(cs->effective_mems, oldcs->effective_mems); in cpuset_attach()
3039 cpuset_attach_nodemask_to = cs->effective_mems; in cpuset_attach()
3043 guarantee_online_mems(cs, &cpuset_attach_nodemask_to); in cpuset_attach()
3046 cpuset_attach_task(cs, task); in cpuset_attach()
3054 cpuset_attach_nodemask_to = cs->effective_mems; in cpuset_attach()
3055 if (!is_memory_migrate(cs) && !mems_updated) in cpuset_attach()
3072 if (is_memory_migrate(cs)) in cpuset_attach()
3081 cs->old_mems_allowed = cpuset_attach_nodemask_to; in cpuset_attach()
3083 if (cs->nr_migrate_dl_tasks) { in cpuset_attach()
3084 cs->nr_deadline_tasks += cs->nr_migrate_dl_tasks; in cpuset_attach()
3085 oldcs->nr_deadline_tasks -= cs->nr_migrate_dl_tasks; in cpuset_attach()
3086 reset_migrate_dl_data(cs); in cpuset_attach()
3089 dec_attach_in_progress_locked(cs); in cpuset_attach()
3100 struct cpuset *cs = css_cs(of_css(of)); in cpuset_write_resmask() local
3107 * CPU or memory hotunplug may leave @cs w/o any execution in cpuset_write_resmask()
3112 * As writes to "cpus" or "mems" may restore @cs's execution in cpuset_write_resmask()
3121 * protection is okay as we check whether @cs is online after in cpuset_write_resmask()
3125 css_get(&cs->css); in cpuset_write_resmask()
3130 if (!is_cpuset_online(cs)) in cpuset_write_resmask()
3133 trialcs = alloc_trial_cpuset(cs); in cpuset_write_resmask()
3141 retval = update_cpumask(cs, trialcs, buf); in cpuset_write_resmask()
3144 retval = update_exclusive_cpumask(cs, trialcs, buf); in cpuset_write_resmask()
3147 retval = update_nodemask(cs, trialcs, buf); in cpuset_write_resmask()
3159 css_put(&cs->css); in cpuset_write_resmask()
3174 struct cpuset *cs = css_cs(seq_css(sf)); in cpuset_common_seq_show() local
3182 seq_printf(sf, "%*pbl\n", cpumask_pr_args(cs->cpus_allowed)); in cpuset_common_seq_show()
3185 seq_printf(sf, "%*pbl\n", nodemask_pr_args(&cs->mems_allowed)); in cpuset_common_seq_show()
3188 seq_printf(sf, "%*pbl\n", cpumask_pr_args(cs->effective_cpus)); in cpuset_common_seq_show()
3191 seq_printf(sf, "%*pbl\n", nodemask_pr_args(&cs->effective_mems)); in cpuset_common_seq_show()
3194 seq_printf(sf, "%*pbl\n", cpumask_pr_args(cs->exclusive_cpus)); in cpuset_common_seq_show()
3197 seq_printf(sf, "%*pbl\n", cpumask_pr_args(cs->effective_xcpus)); in cpuset_common_seq_show()
3215 struct cpuset *cs = css_cs(seq_css(seq)); in sched_partition_show() local
3218 switch (cs->partition_root_state) { in sched_partition_show()
3234 err = perr_strings[READ_ONCE(cs->prs_err)]; in sched_partition_show()
3247 struct cpuset *cs = css_cs(of_css(of)); in sched_partition_write() local
3262 css_get(&cs->css); in sched_partition_write()
3265 if (!is_cpuset_online(cs)) in sched_partition_write()
3268 retval = update_prstate(cs, val); in sched_partition_write()
3272 css_put(&cs->css); in sched_partition_write()
3366 struct cpuset *cs; in cpuset_css_alloc() local
3371 cs = kzalloc(sizeof(*cs), GFP_KERNEL); in cpuset_css_alloc()
3372 if (!cs) in cpuset_css_alloc()
3375 if (alloc_cpumasks(cs, NULL)) { in cpuset_css_alloc()
3376 kfree(cs); in cpuset_css_alloc()
3380 __set_bit(CS_SCHED_LOAD_BALANCE, &cs->flags); in cpuset_css_alloc()
3381 fmeter_init(&cs->fmeter); in cpuset_css_alloc()
3382 cs->relax_domain_level = -1; in cpuset_css_alloc()
3383 INIT_LIST_HEAD(&cs->remote_sibling); in cpuset_css_alloc()
3387 __set_bit(CS_MEMORY_MIGRATE, &cs->flags); in cpuset_css_alloc()
3389 return &cs->css; in cpuset_css_alloc()
3394 struct cpuset *cs = css_cs(css); in cpuset_css_online() local
3395 struct cpuset *parent = parent_cs(cs); in cpuset_css_online()
3405 set_bit(CS_ONLINE, &cs->flags); in cpuset_css_online()
3407 set_bit(CS_SPREAD_PAGE, &cs->flags); in cpuset_css_online()
3409 set_bit(CS_SPREAD_SLAB, &cs->flags); in cpuset_css_online()
3415 clear_bit(CS_SCHED_LOAD_BALANCE, &cs->flags); in cpuset_css_online()
3421 cpumask_copy(cs->effective_cpus, parent->effective_cpus); in cpuset_css_online()
3422 cs->effective_mems = parent->effective_mems; in cpuset_css_online()
3452 cs->mems_allowed = parent->mems_allowed; in cpuset_css_online()
3453 cs->effective_mems = parent->mems_allowed; in cpuset_css_online()
3454 cpumask_copy(cs->cpus_allowed, parent->cpus_allowed); in cpuset_css_online()
3455 cpumask_copy(cs->effective_cpus, parent->cpus_allowed); in cpuset_css_online()
3476 struct cpuset *cs = css_cs(css); in cpuset_css_offline() local
3481 if (is_partition_valid(cs)) in cpuset_css_offline()
3482 update_prstate(cs, 0); in cpuset_css_offline()
3485 is_sched_load_balance(cs)) in cpuset_css_offline()
3486 cpuset_update_flag(CS_SCHED_LOAD_BALANCE, cs, 0); in cpuset_css_offline()
3489 clear_bit(CS_ONLINE, &cs->flags); in cpuset_css_offline()
3497 struct cpuset *cs = css_cs(css); in cpuset_css_free() local
3499 free_cpuset(cs); in cpuset_css_free()
3527 struct cpuset *cs = css_cs(cset->subsys[cpuset_cgrp_id]); in cpuset_can_fork() local
3532 same_cs = (cs == task_cs(current)); in cpuset_can_fork()
3542 ret = cpuset_can_attach_check(cs); in cpuset_can_fork()
3558 cs->attach_in_progress++; in cpuset_can_fork()
3566 struct cpuset *cs = css_cs(cset->subsys[cpuset_cgrp_id]); in cpuset_cancel_fork() local
3570 same_cs = (cs == task_cs(current)); in cpuset_cancel_fork()
3576 dec_attach_in_progress(cs); in cpuset_cancel_fork()
3586 struct cpuset *cs; in cpuset_fork() local
3590 cs = task_cs(task); in cpuset_fork()
3591 same_cs = (cs == task_cs(current)); in cpuset_fork()
3595 if (cs == &top_cpuset) in cpuset_fork()
3605 guarantee_online_mems(cs, &cpuset_attach_nodemask_to); in cpuset_fork()
3606 cpuset_attach_task(cs, task); in cpuset_fork()
3608 dec_attach_in_progress_locked(cs); in cpuset_fork()
3671 hotplug_update_tasks(struct cpuset *cs, in hotplug_update_tasks() argument
3676 if (cpumask_empty(new_cpus) && !is_partition_valid(cs)) in hotplug_update_tasks()
3677 cpumask_copy(new_cpus, parent_cs(cs)->effective_cpus); in hotplug_update_tasks()
3679 *new_mems = parent_cs(cs)->effective_mems; in hotplug_update_tasks()
3682 cpumask_copy(cs->effective_cpus, new_cpus); in hotplug_update_tasks()
3683 cs->effective_mems = *new_mems; in hotplug_update_tasks()
3687 cpuset_update_tasks_cpumask(cs, new_cpus); in hotplug_update_tasks()
3689 cpuset_update_tasks_nodemask(cs); in hotplug_update_tasks()
3699 * @cs: cpuset in interest
3702 * Compare @cs's cpu and mem masks against top_cpuset and if some have gone
3703 * offline, update @cs accordingly. If @cs ends up with no CPU or memory,
3706 static void cpuset_hotplug_update_tasks(struct cpuset *cs, struct tmpmasks *tmp) in cpuset_hotplug_update_tasks() argument
3716 wait_event(cpuset_attach_wq, cs->attach_in_progress == 0); in cpuset_hotplug_update_tasks()
3724 if (cs->attach_in_progress) { in cpuset_hotplug_update_tasks()
3729 parent = parent_cs(cs); in cpuset_hotplug_update_tasks()
3730 compute_effective_cpumask(&new_cpus, cs, parent); in cpuset_hotplug_update_tasks()
3731 nodes_and(new_mems, cs->mems_allowed, parent->effective_mems); in cpuset_hotplug_update_tasks()
3733 if (!tmp || !cs->partition_root_state) in cpuset_hotplug_update_tasks()
3740 remote = is_remote_partition(cs); in cpuset_hotplug_update_tasks()
3741 if (remote || (is_partition_valid(cs) && is_partition_valid(parent))) in cpuset_hotplug_update_tasks()
3742 compute_partition_effective_cpumask(cs, &new_cpus); in cpuset_hotplug_update_tasks()
3745 partition_is_populated(cs, NULL)) { in cpuset_hotplug_update_tasks()
3746 remote_partition_disable(cs, tmp); in cpuset_hotplug_update_tasks()
3747 compute_effective_cpumask(&new_cpus, cs, parent); in cpuset_hotplug_update_tasks()
3759 if (is_local_partition(cs) && (!is_partition_valid(parent) || in cpuset_hotplug_update_tasks()
3760 tasks_nocpu_error(parent, cs, &new_cpus))) in cpuset_hotplug_update_tasks()
3766 else if (is_partition_valid(parent) && is_partition_invalid(cs)) in cpuset_hotplug_update_tasks()
3770 update_parent_effective_cpumask(cs, partcmd, NULL, tmp); in cpuset_hotplug_update_tasks()
3771 if ((partcmd == partcmd_invalidate) || is_partition_valid(cs)) { in cpuset_hotplug_update_tasks()
3772 compute_partition_effective_cpumask(cs, &new_cpus); in cpuset_hotplug_update_tasks()
3778 cpus_updated = !cpumask_equal(&new_cpus, cs->effective_cpus); in cpuset_hotplug_update_tasks()
3779 mems_updated = !nodes_equal(new_mems, cs->effective_mems); in cpuset_hotplug_update_tasks()
3787 hotplug_update_tasks(cs, &new_cpus, &new_mems, in cpuset_hotplug_update_tasks()
3790 cpuset1_hotplug_update_tasks(cs, &new_cpus, &new_mems, in cpuset_hotplug_update_tasks()
3882 struct cpuset *cs; in cpuset_handle_hotplug() local
3886 cpuset_for_each_descendant_pre(cs, pos_css, &top_cpuset) { in cpuset_handle_hotplug()
3887 if (cs == &top_cpuset || !css_tryget_online(&cs->css)) in cpuset_handle_hotplug()
3891 cpuset_hotplug_update_tasks(cs, ptmp); in cpuset_handle_hotplug()
3894 css_put(&cs->css); in cpuset_handle_hotplug()
3967 struct cpuset *cs; in cpuset_cpus_allowed() local
3972 cs = task_cs(tsk); in cpuset_cpus_allowed()
3973 if (cs != &top_cpuset) in cpuset_cpus_allowed()
3980 if ((cs == &top_cpuset) || cpumask_empty(pmask)) { in cpuset_cpus_allowed()
4027 * But we used cs && cs->cpus_allowed lockless and thus can in cpuset_cpus_allowed_fallback()
4090 static struct cpuset *nearest_hardwall_ancestor(struct cpuset *cs) in nearest_hardwall_ancestor() argument
4092 while (!(is_mem_exclusive(cs) || is_mem_hardwall(cs)) && parent_cs(cs)) in nearest_hardwall_ancestor()
4093 cs = parent_cs(cs); in nearest_hardwall_ancestor()
4094 return cs; in nearest_hardwall_ancestor()
4139 struct cpuset *cs; /* current cpuset ancestors */ in cpuset_node_allowed() local
4163 cs = nearest_hardwall_ancestor(task_cs(current)); in cpuset_node_allowed()
4164 allowed = node_isset(node, cs->mems_allowed); in cpuset_node_allowed()