From: Oleg Nesterov <oleg@redhat.com>
To: Jeff Layton <jlayton@redhat.com>
Cc: Tejun Heo <tj@kernel.org>, "Rafael J. Wysocki" <rjw@sisk.pl>,
Steve French <sfrench@samba.org>,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
linux-cifs@vger.kernel.org,
"J. Bruce Fields" <bfields@fieldses.org>,
Neil Brown <neilb@suse.de>,
trond.myklebust@netapp.com, linux-nfs@vger.kernel.org
Subject: Re: [RFC PATCH] freezer: revert 27920651fe "PM / Freezer: Make fake_signal_wake_up() wake TASK_KILLABLE tasks too"
Date: Wed, 2 Nov 2011 16:13:54 +0100 [thread overview]
Message-ID: <20111102151354.GA28527@redhat.com> (raw)
In-Reply-To: <20111102074257.7174691c@tlielax.poochiereds.net>
On 11/02, Jeff Layton wrote:
>
> On Tue, 1 Nov 2011 14:57:10 -0700
> Tejun Heo <tj@kernel.org> wrote:
>
> > For now, let's go with the count/dont_count. Can you please write up
> > a patch for that? Jeff, does this seem okay to you?
> >
>
> Let me make sure I understand since I don't have a great grasp of the
> freezer internals...
>
> This will set the PF_FREEZER_SKIP flag on the task, which prevents
> try_to_freeze_tasks from incrementing the "todo" var for this process
> and should let the suspend proceed.
>
> So this really makes try_to_freeze_tasks set PF_FREEZING on the task,
> but not get upset that it doesn't actually call try_to_freeze().
Yes. PF_FREEZER_SKIP means, "please count me as frozen". This task can
do nothing except refrigerator() after wakeup.
> Is that sufficient for a process that's just sleeping here?
I think this should work... but this is the question to you ;)
Oleg.
next prev parent reply other threads:[~2011-11-02 15:18 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-31 22:17 Tejun Heo
2011-10-31 23:17 ` Tejun Heo
2011-10-31 23:24 ` Rafael J. Wysocki
2011-10-31 23:30 ` Tejun Heo
2011-11-01 0:55 ` Tejun Heo
2011-11-01 8:13 ` Jeff Layton
2011-11-01 10:59 ` Jeff Layton
2011-11-01 16:30 ` Tejun Heo
2011-11-01 16:49 ` Trond Myklebust
2011-11-01 16:55 ` Tejun Heo
2011-11-01 17:59 ` Oleg Nesterov
2011-11-01 18:06 ` Tejun Heo
2011-11-01 18:13 ` Oleg Nesterov
2011-11-01 18:27 ` Tejun Heo
2011-11-01 19:39 ` Oleg Nesterov
2011-11-01 19:46 ` Oleg Nesterov
2011-11-01 21:57 ` Tejun Heo
2011-11-02 11:42 ` Jeff Layton
2011-11-02 15:13 ` Oleg Nesterov [this message]
2011-11-02 16:23 ` Oleg Nesterov
2011-11-02 23:11 ` Rafael J. Wysocki
2011-11-03 11:15 ` Jeff Layton
2011-11-03 15:10 ` Oleg Nesterov
2011-11-02 17:53 ` [PATCH] wait_event_freezekillable: use freezer_do_not_count/freezer_count Oleg Nesterov
2011-11-03 10:42 ` Jeff Layton
2011-11-03 14:13 ` Tejun Heo
2011-11-03 15:27 ` Jeff Layton
2011-11-03 15:30 ` Tejun Heo
2011-11-01 18:26 ` [RFC PATCH] freezer: revert 27920651fe "PM / Freezer: Make fake_signal_wake_up() wake TASK_KILLABLE tasks too" Jeff Layton
2011-10-31 23:45 ` Steve French
2011-10-31 23:53 ` Tejun Heo
2011-11-01 0:02 ` Steve French
2011-11-01 17:50 ` Oleg Nesterov
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