[PATCH] kthread_work: wake up worker only when the worker is idle

From: Lai Jiangshan
Date: Sat Jul 26 2014 - 00:03:24 EST

If the worker task is not idle, it may sleep on some conditions by the request
of the work. Our unfriendly wakeup in the insert_kthread_work() may confuse
the worker.

Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
kernel/kthread.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/kthread.c b/kernel/kthread.c
index c2390f4..ef48322 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -591,7 +591,7 @@ static void insert_kthread_work(struct kthread_worker *worker,

list_add_tail(&work->node, pos);
work->worker = worker;
- if (likely(worker->task))
+ if (!worker->current_work && likely(worker->task))


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