From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: [PATCH 0/1] (Was: freezer: add missing mb's to freezer_count() and
	freezer_should_skip())
Date: Thu, 25 Oct 2012 18:39:41 +0200
Message-ID: <20121025163941.GA3801@redhat.com>
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To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, stable-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, rjw-KKrjLPT3xs0@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

Hi Tejun,

On 10/24, Tejun Heo wrote:
> Hello, Oleg.
>
> On Tue, Oct 23, 2012 at 05:39:19PM +0200, Oleg Nesterov wrote:
> > > Hmm....  Guess we should drop __ from set_current_state.
> >
> > Yes.
> >
> > Or we can change ptrace_stop() and do_signal_stop() to use freezer_do_not_count/
> > freezer_count and remove task_is_stopped_or_traced() from update_if_frozen()
> > and try_to_freeze_tasks(). But this means that do_signal_stop() will call
> > try_to_freeze() twice, unless we add __freezer_count() which only clears
> > PF_FREEZER_SKIP.
>
> Ooh, I like this idea.  If we have a mechanism to mark a task "frozen
> enough", it makes sense to use it universally.

Yes, I agree.

Fortunately we already have freezable_schedule() so this patch is
really simple.

On top of this series.

Oleg.