* [PATCH 5/7] slab, workqueue: remove keventd_up() usage
[not found] <1473967821-24363-1-git-send-email-tj@kernel.org>
@ 2016-09-15 19:30 ` Tejun Heo
2016-09-22 8:01 ` Joonsoo Kim
0 siblings, 1 reply; 2+ messages in thread
From: Tejun Heo @ 2016-09-15 19:30 UTC (permalink / raw)
To: torvalds
Cc: linux-kernel, jiangshanlai, akpm, kernel-team, Tejun Heo,
Christoph Lameter, Pekka Enberg, David Rientjes, Joonsoo Kim,
linux-mm
Now that workqueue can handle work item queueing from very early
during boot, there is no need to gate schedule_delayed_work_on() while
!keventd_up(). Remove it.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mm@kvack.org
---
Hello,
This change depends on an earlier workqueue patch and is followed by a
patch to remove keventd_up(). It'd be great if it can be routed
through the wq/for-4.9 branch.
Thanks.
mm/slab.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/mm/slab.c b/mm/slab.c
index b672710..dc69b6b 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -550,12 +550,7 @@ static void start_cpu_timer(int cpu)
{
struct delayed_work *reap_work = &per_cpu(slab_reap_work, cpu);
- /*
- * When this gets called from do_initcalls via cpucache_init(),
- * init_workqueues() has already run, so keventd will be setup
- * at that time.
- */
- if (keventd_up() && reap_work->work.func == NULL) {
+ if (reap_work->work.func == NULL) {
init_reap_node(cpu);
INIT_DEFERRABLE_WORK(reap_work, cache_reap);
schedule_delayed_work_on(cpu, reap_work,
--
2.7.4
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