Merge branch 'cgroup/for-6.11-fixes' into cgroup/for-6.12
cgroup/for-6.12 is about to receive updates that are dependent on changes from both for-6.11-fixes and for-6.12. Pull in for-6.11-fixes. Signed-off-by: Tejun Heo <tj@kernel.org>
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commit
bc3c27516f
@ -231,6 +231,13 @@ static cpumask_var_t isolated_cpus;
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/* List of remote partition root children */
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static struct list_head remote_children;
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/*
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* A flag to force sched domain rebuild at the end of an operation while
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* inhibiting it in the intermediate stages when set. Currently it is only
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* set in hotplug code.
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*/
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static bool force_sd_rebuild;
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/*
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* Partition root states:
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*
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@ -1467,7 +1474,7 @@ static void update_partition_sd_lb(struct cpuset *cs, int old_prs)
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clear_bit(CS_SCHED_LOAD_BALANCE, &cs->flags);
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}
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if (rebuild_domains)
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if (rebuild_domains && !force_sd_rebuild)
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rebuild_sched_domains_locked();
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}
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@ -1820,7 +1827,7 @@ static void remote_partition_check(struct cpuset *cs, struct cpumask *newmask,
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remote_partition_disable(child, tmp);
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disable_cnt++;
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}
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if (disable_cnt)
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if (disable_cnt && !force_sd_rebuild)
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rebuild_sched_domains_locked();
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}
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@ -1978,6 +1985,8 @@ static int update_parent_effective_cpumask(struct cpuset *cs, int cmd,
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part_error = PERR_CPUSEMPTY;
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goto write_error;
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}
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/* Check newmask again, whether cpus are available for parent/cs */
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nocpu |= tasks_nocpu_error(parent, cs, newmask);
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/*
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* partcmd_update with newmask:
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@ -2423,7 +2432,8 @@ get_css:
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}
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rcu_read_unlock();
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if (need_rebuild_sched_domains && !(flags & HIER_NO_SD_REBUILD))
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if (need_rebuild_sched_domains && !(flags & HIER_NO_SD_REBUILD) &&
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!force_sd_rebuild)
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rebuild_sched_domains_locked();
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}
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@ -2506,7 +2516,8 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
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*/
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if (!*buf) {
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cpumask_clear(trialcs->cpus_allowed);
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cpumask_clear(trialcs->effective_xcpus);
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if (cpumask_empty(trialcs->exclusive_cpus))
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cpumask_clear(trialcs->effective_xcpus);
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} else {
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retval = cpulist_parse(buf, trialcs->cpus_allowed);
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if (retval < 0)
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@ -3084,7 +3095,8 @@ static int update_flag(cpuset_flagbits_t bit, struct cpuset *cs,
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cs->flags = trialcs->flags;
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spin_unlock_irq(&callback_lock);
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if (!cpumask_empty(trialcs->cpus_allowed) && balance_flag_changed)
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if (!cpumask_empty(trialcs->cpus_allowed) && balance_flag_changed &&
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!force_sd_rebuild)
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rebuild_sched_domains_locked();
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if (spread_flag_changed)
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@ -4465,11 +4477,9 @@ hotplug_update_tasks(struct cpuset *cs,
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update_tasks_nodemask(cs);
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}
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static bool force_rebuild;
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void cpuset_force_rebuild(void)
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{
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force_rebuild = true;
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force_sd_rebuild = true;
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}
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/**
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@ -4617,15 +4627,9 @@ static void cpuset_handle_hotplug(void)
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!cpumask_empty(subpartitions_cpus);
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mems_updated = !nodes_equal(top_cpuset.effective_mems, new_mems);
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/*
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* In the rare case that hotplug removes all the cpus in
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* subpartitions_cpus, we assumed that cpus are updated.
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*/
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if (!cpus_updated && !cpumask_empty(subpartitions_cpus))
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cpus_updated = true;
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/* For v1, synchronize cpus_allowed to cpu_active_mask */
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if (cpus_updated) {
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cpuset_force_rebuild();
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spin_lock_irq(&callback_lock);
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if (!on_dfl)
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cpumask_copy(top_cpuset.cpus_allowed, &new_cpus);
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@ -4681,8 +4685,8 @@ static void cpuset_handle_hotplug(void)
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}
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/* rebuild sched domains if cpus_allowed has changed */
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if (cpus_updated || force_rebuild) {
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force_rebuild = false;
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if (force_sd_rebuild) {
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force_sd_rebuild = false;
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rebuild_sched_domains_cpuslocked();
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}
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