Commit be34f0f3 authored Sep 21, 2014 by Oleg Nesterov Committed by Ingo Molnar Sep 24, 2014

sched/numa: Kill the wrong/dead TASK_DEAD check in task_numa_fault()



current->state == TASK_DEAD means that the task is doing its
last schedule(), page fault is obviously impossible at this
stage.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20140921194743.GA30114@redhat.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 9c58c79a

kernel/sched/fair.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -1817,10 +1817,6 @@ void task_numa_fault(int last_cpupid, int mem_node, int pages, int flags)
		if (!p->mm)
		return;

		/* Do not worry about placement if exiting */
		if (p->state == TASK_DEAD)
		return;

		/* Allocate buffer to track faults on a per-node basis */
		if (unlikely(!p->numa_faults_memory)) {
		int size = sizeof(p->numa_faults_memory)

Admin message