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authorMarcelo Tosatti <mtosatti@redhat.com>2020-05-27 16:29:08 +0200
committerPeter Zijlstra <peterz@infradead.org>2020-06-15 14:10:03 +0200
commit043eb8e1051143a24811e6f35c276e35ae8247b6 (patch)
tree19eaec0b052cdcaba74b1a48fcff7085d6d1a03d
parent461daba06bdcb9c7a3f92b9bbd110e1f7d093ffc (diff)
kthread: Switch to cpu_possible_mask
Next patch will switch unbound kernel threads mask to housekeeping_cpumask(), a subset of cpu_possible_mask. So in order to ease bisection, lets first switch kthreads default affinity from cpu_all_mask to cpu_possible_mask. It looks safe to do so as cpu_possible_mask seem to be initialized at setup_arch() time, way before kthreadd is created. Suggested-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200527142909.23372-2-frederic@kernel.org
-rw-r--r--kernel/kthread.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c
index 8e3d2d7fdf5e..b86d37cda109 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -383,7 +383,7 @@ struct task_struct *__kthread_create_on_node(int (*threadfn)(void *data),
* The kernel thread should not inherit these properties.
*/
sched_setscheduler_nocheck(task, SCHED_NORMAL, &param);
- set_cpus_allowed_ptr(task, cpu_all_mask);
+ set_cpus_allowed_ptr(task, cpu_possible_mask);
}
kfree(create);
return task;
@@ -608,7 +608,7 @@ int kthreadd(void *unused)
/* Setup a clean context for our children to inherit. */
set_task_comm(tsk, "kthreadd");
ignore_signals(tsk);
- set_cpus_allowed_ptr(tsk, cpu_all_mask);
+ set_cpus_allowed_ptr(tsk, cpu_possible_mask);
set_mems_allowed(node_states[N_MEMORY]);
current->flags |= PF_NOFREEZE;