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Commit 8df185a9 authored by Mike Travis's avatar Mike Travis Committed by Ingo Molnar
Browse files

kthread: reduce stack pressure in create_kthread and kthreadd 



  * Replace:

  	set_cpus_allowed(..., CPU_MASK_ALL)

    with:

  	set_cpus_allowed_ptr(..., CPU_MASK_ALL_PTR)

    to remove excessive stack requirements when NR_CPUS=4096.

Signed-off-by: default avatarMike Travis <travis@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 8b95d917

kernel/kthread.c

+2 −2
Original line number Diff line number Diff line
@@ -106,7 +106,7 @@ static void create_kthread(struct kthread_create_info *create) 
		 */

		sched_setscheduler(create->result, SCHED_NORMAL, &param);

		set_user_nice(create->result, KTHREAD_NICE_LEVEL);

		set_cpus_allowed(create->result, CPU_MASK_ALL);

		set_cpus_allowed_ptr(create->result, CPU_MASK_ALL_PTR);

	}

	complete(&create->done);

}
@@ -233,7 +233,7 @@ int kthreadd(void *unused) 
	set_task_comm(tsk, "kthreadd");

	ignore_signals(tsk);

	set_user_nice(tsk, KTHREAD_NICE_LEVEL);

	set_cpus_allowed(tsk, CPU_MASK_ALL);

	set_cpus_allowed_ptr(tsk, CPU_MASK_ALL_PTR);



	current->flags |= PF_NOFREEZE | PF_FREEZER_NOSIG;