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From: Marcelo Tosatti <mtosatti@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
	Chris Friesen <chris.friesen@windriver.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Jim Somerville <Jim.Somerville@windriver.com>,
	Christoph Lameter <cl@linux.com>,
	Frederic Weisbecker <frederic@kernel.org>,
	Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 1/4] kthread: switch to cpu_possible_mask
Date: Wed, 01 Apr 2020 09:10:19 -0300	[thread overview]
Message-ID: <20200401121342.883941670@redhat.com> (raw)
In-Reply-To: <20200401121018.104226700@redhat.com>

Next patch will switch unbound kernel threads mask to 
housekeeping_cpumask(), a subset of cpu_possible_mask.

Switch from cpu_all_mask to cpu_possible_mask separately,
to ease bisection.

Suggested-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

---
 kernel/kthread.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6/kernel/kthread.c
===================================================================
--- linux-2.6.orig/kernel/kthread.c
+++ linux-2.6/kernel/kthread.c
@@ -347,7 +347,7 @@ struct task_struct *__kthread_create_on_
 		 * 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;
@@ -572,7 +572,7 @@ 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;



  reply	other threads:[~2020-04-01 12:15 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-01 12:10 [patch 0/4] affine kernel threads to nohz_full= cpumask (v4) Marcelo Tosatti
2020-04-01 12:10 ` Marcelo Tosatti [this message]
2020-04-01 12:10 ` [patch 2/4] isolation: set HK_FLAG_SCHED on nohz_full CPUs Marcelo Tosatti
2020-04-01 12:10 ` [patch 3/4] isolcpus: affine kernel threads to housekeeping cpus Marcelo Tosatti
2020-04-01 22:32   ` Randy Dunlap
2020-04-03 10:37   ` [patch 3/4 v2] " Marcelo Tosatti
2020-04-01 12:10 ` [patch 4/4] isolcpus: undeprecate on documentation Marcelo Tosatti
2020-04-20 16:02 ` [patch 0/4] affine kernel threads to nohz_full= cpumask (v4) Frederic Weisbecker

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