From mboxrd@z Thu Jan 1 00:00:00 1970 From: Colin Cross Subject: [PATCH 02/10] freezer: skip waking up tasks with PF_FREEZER_SKIP set Date: Mon, 29 Apr 2013 14:45:38 -0700 Message-ID: <1367271946-7239-3-git-send-email-ccross@android.com> References: <1367271946-7239-1-git-send-email-ccross@android.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1367271946-7239-1-git-send-email-ccross-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: containers-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Len Brown , containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, "Rafael J. Wysocki" , arve-z5hGa2qSFaRBDgjK7y7TUQ@public.gmane.org, Pavel Machek , Colin Cross , Tejun Heo , cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-pm@vger.kernel.org If a task has called freezer_do_not_count(), don't bother waking it up. If it happens to wake up later it will call freezer_count() and immediately enter the refrigerator. Signed-off-by: Colin Cross --- kernel/cgroup_freezer.c | 5 ++++- kernel/power/process.c | 4 ++-- 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c index 75dda1e..406dd71 100644 --- a/kernel/cgroup_freezer.c +++ b/kernel/cgroup_freezer.c @@ -331,8 +331,11 @@ static void freeze_cgroup(struct freezer *freezer) struct task_struct *task; cgroup_iter_start(cgroup, &it); - while ((task = cgroup_iter_next(cgroup, &it))) + while ((task = cgroup_iter_next(cgroup, &it))) { + if (freezer_should_skip(task)) + continue; freeze_task(task); + } cgroup_iter_end(cgroup, &it); } diff --git a/kernel/power/process.c b/kernel/power/process.c index eb7e6c1..0680be2 100644 --- a/kernel/power/process.c +++ b/kernel/power/process.c @@ -46,10 +46,10 @@ static int try_to_freeze_tasks(bool user_only) todo = 0; read_lock(&tasklist_lock); do_each_thread(g, p) { - if (p == current || !freeze_task(p)) + if (p == current || freezer_should_skip(p)) continue; - if (!freezer_should_skip(p)) + if (freeze_task(p)) todo++; } while_each_thread(g, p); read_unlock(&tasklist_lock); -- 1.8.2.1