From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: [PATCH 7/9] cgroup: bounce css release through css->destroy_work Date: Fri, 9 May 2014 17:13:33 -0400 Message-ID: <1399670015-23463-8-git-send-email-tj@kernel.org> References: <1399670015-23463-1-git-send-email-tj@kernel.org> Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=4DPo1FdKSz7tVMhXCqn7IxH4HbzTBL/D7ITuH8FRi1s=; b=Vq4qaC+/AHTL8LeSIIFeH2yNg53UcxKWbpLO2R1pAZHD37X7R+W9a37Kj+AXxDnsi/ yCnggf5ayr5Pw8zHk1vhYx5APgt91qpLRyuzpW+AjrugHnCuGqskDo69Hvg8O9KvN8EF 0PzNRp/7DyX3+wGOdHNoltWBISW/MWSK4HiK3Q89ktntXlY4BFbmcXGawg04bBrl5adG yCWXUOnuIyQxm72Lx0pJI/WVHbM83cU2+0SZAJXFcrbNxnPwlZWuyfn2YtSauYxKnb9Y QLUeUFzOtxYhpJFEw+stJyHl53884WPCHT7O+d2jal5Rv9Xk+4gKxXpdHvJ1aSsBVyuE YlhQ== In-Reply-To: <1399670015-23463-1-git-send-email-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lizefan@huawei.com Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Tejun Heo css release is planned to do more and would require process context. Bounce it through css->destroy_work. Signed-off-by: Tejun Heo --- kernel/cgroup.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/kernel/cgroup.c b/kernel/cgroup.c index bb67acb..b382383 100644 --- a/kernel/cgroup.c +++ b/kernel/cgroup.c @@ -4125,10 +4125,10 @@ static void css_free_rcu_fn(struct rcu_head *rcu_head) queue_work(cgroup_destroy_wq, &css->destroy_work); } -static void css_release(struct percpu_ref *ref) +static void css_release_work_fn(struct work_struct *work) { struct cgroup_subsys_state *css = - container_of(ref, struct cgroup_subsys_state, refcnt); + container_of(work, struct cgroup_subsys_state, destroy_work); struct cgroup_subsys *ss = css->ss; cgroup_idr_remove(&ss->css_idr, css->id); @@ -4136,6 +4136,15 @@ static void css_release(struct percpu_ref *ref) call_rcu(&css->rcu_head, css_free_rcu_fn); } +static void css_release(struct percpu_ref *ref) +{ + struct cgroup_subsys_state *css = + container_of(ref, struct cgroup_subsys_state, refcnt); + + INIT_WORK(&css->destroy_work, css_release_work_fn); + queue_work(cgroup_destroy_wq, &css->destroy_work); +} + static void init_and_link_css(struct cgroup_subsys_state *css, struct cgroup_subsys *ss, struct cgroup *cgrp) { -- 1.9.0