Hello.
On Mon, Apr 25, 2022 at 11:55:05AM -0400, Waiman Long longman@redhat.com wrote:
smp_init() is called after the first two init functions. So we don't have a complete list of active cpus and memory nodes until later in cpuset_init_smp() which is the right time to set up effective_cpus and effective_mems.
Yes.
setup_arch prefill_possible_map cpuset_init (1) cgroup_init cpuset_bind (2a) ... kernel_init kernel_init_freeable ... cpuset_init_smp (3) ... ... cpuset_bind (2b)
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index 9390bfd9f1cd..6bd8f5ef40fe 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -3390,8 +3390,9 @@ static struct notifier_block cpuset_track_online_nodes_nb = { */ void __init cpuset_init_smp(void) {
- cpumask_copy(top_cpuset.cpus_allowed, cpu_active_mask);
- top_cpuset.mems_allowed = node_states[N_MEMORY];
- /*
* cpus_allowd/mems_allowed will be properly set up in cpuset_bind().*/
IIUC, the comment should say
* cpus_allowed/mems_allowed were (v2) or will be (v1) properly set up in cpuset_bind().
(nit)
Reviewed-by: Michal Koutný mkoutny@suse.com