kernel/cgroup/cpuset.c

2290  * @trialcs: trial cpuset
2293 static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
2314 		cpumask_clear(trialcs->cpus_allowed);
2315 		if (cpumask_empty(trialcs->exclusive_cpus))
2316 			cpumask_clear(trialcs->effective_xcpus);
2318 		retval = cpulist_parse(buf, trialcs->cpus_allowed);
2322 		if (!cpumask_subset(trialcs->cpus_allowed,
2329 		 * trialcs->effective_xcpus is used as a temporary cpumask
2332 		trialcs->partition_root_state = PRS_MEMBER;
2333 		if (!cpumask_empty(trialcs->exclusive_cpus) || is_partition_valid(cs))
2334 			compute_effective_exclusive_cpumask(trialcs, NULL, cs);
2338 	if (cpumask_equal(cs->cpus_allowed, trialcs->cpus_allowed))
2346 		    cpumask_empty(trialcs->effective_xcpus)) {
2349 		} else if (prstate_housekeeping_conflict(old_prs, trialcs->effective_xcpus)) {
2352 		} else if (tasks_nocpu_error(parent, cs, trialcs->effective_xcpus)) {
2362 	force = !cpumask_equal(cs->effective_xcpus, trialcs->effective_xcpus);
2364 	retval = validate_change(cs, trialcs);
2380 			struct cpumask *xcpus = user_xcpus(trialcs);
2398 		struct cpumask *xcpus = trialcs->effective_xcpus;
2401 			xcpus = trialcs->cpus_allowed;
2417 	cpumask_copy(cs->cpus_allowed, trialcs->cpus_allowed);
2418 	cpumask_copy(cs->effective_xcpus, trialcs->effective_xcpus);
2437  * @trialcs: trial cpuset
2442 static int update_exclusive_cpumask(struct cpuset *cs, struct cpuset *trialcs,
2453 		cpumask_clear(trialcs->exclusive_cpus);
2454 		cpumask_clear(trialcs->effective_xcpus);
2456 		retval = cpulist_parse(buf, trialcs->exclusive_cpus);
2462 	if (cpumask_equal(cs->exclusive_cpus, trialcs->exclusive_cpus))
2466 		trialcs->partition_root_state = PRS_MEMBER;
2471 		if (compute_effective_exclusive_cpumask(trialcs, NULL, cs))
2479 	force = !cpumask_equal(cs->effective_xcpus, trialcs->effective_xcpus);
2481 	retval = validate_change(cs, trialcs);
2489 		if (cpumask_empty(trialcs->effective_xcpus)) {
2492 		} else if (prstate_housekeeping_conflict(old_prs, trialcs->effective_xcpus)) {
2495 		} else if (tasks_nocpu_error(parent, cs, trialcs->effective_xcpus)) {
2504 				remote_cpus_update(cs, trialcs->exclusive_cpus,
2505 						   trialcs->effective_xcpus, &tmp);
2511 						trialcs->effective_xcpus, &tmp);
2515 	cpumask_copy(cs->exclusive_cpus, trialcs->exclusive_cpus);
2516 	cpumask_copy(cs->effective_xcpus, trialcs->effective_xcpus);
2747 static int update_nodemask(struct cpuset *cs, struct cpuset *trialcs,
2768 		nodes_clear(trialcs->mems_allowed);
2770 		retval = nodelist_parse(buf, trialcs->mems_allowed);
2774 		if (!nodes_subset(trialcs->mems_allowed,
2781 	if (nodes_equal(cs->mems_allowed, trialcs->mems_allowed)) {
2785 	retval = validate_change(cs, trialcs);
2789 	check_insane_mems_config(&trialcs->mems_allowed);
2792 	cs->mems_allowed = trialcs->mems_allowed;
2795 	/* use trialcs->mems_allowed as a temp variable */
2796 	update_nodemasks_hier(cs, &trialcs->mems_allowed);
2824 	struct cpuset *trialcs;
2829 	trialcs = alloc_trial_cpuset(cs);
2830 	if (!trialcs)
2834 		set_bit(bit, &trialcs->flags);
2836 		clear_bit(bit, &trialcs->flags);
2838 	err = validate_change(cs, trialcs);
2843 				is_sched_load_balance(trialcs));
2845 	spread_flag_changed = ((is_spread_slab(cs) != is_spread_slab(trialcs))
2846 			|| (is_spread_page(cs) != is_spread_page(trialcs)));
2849 	cs->flags = trialcs->flags;
2852 	if (!cpumask_empty(trialcs->cpus_allowed) && balance_flag_changed) {
2862 	free_cpuset(trialcs);
3223 	struct cpuset *trialcs;
3232 	trialcs = alloc_trial_cpuset(cs);
3233 	if (!trialcs) {
3240 		retval = update_cpumask(cs, trialcs, buf);
3243 		retval = update_exclusive_cpumask(cs, trialcs, buf);
3246 		retval = update_nodemask(cs, trialcs, buf);
3253 	free_cpuset(trialcs);