From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Tejun Heo <tj@kernel.org>
Cc: Cong Wang <xiyou.wangcong@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
David Rientjes <rientjes@google.com>,
Michal Hocko <mhocko@suse.cz>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [Patch v4 1/2] freezer: check OOM kill while being frozen
Date: Tue, 09 Sep 2014 01:15:23 +0200 [thread overview]
Message-ID: <1899038.KOOHvy2XUu@vostro.rjw.lan> (raw)
In-Reply-To: <20140908225012.GE3806@mtj.dyndns.org>
On Tuesday, September 09, 2014 07:50:12 AM Tejun Heo wrote:
> Hello,
>
> On Tue, Sep 09, 2014 at 12:48:28AM +0200, Rafael J. Wysocki wrote:
> > Well, not exactly from anywhere. Just from where try_to_freeze() is called
> > I suppose?
>
> Yeap, anywhere try_to_freeze() may be called.
>
> > Which means that if this is a user space task, it won't to a lot before dying,
> > will it?
>
> Userland tasks aren't likely to a lot of damages before dying but then
> again there's no guarantee. As it currently stands, try_to_freeze()
> can be anywhere.
Well, in that case the TIF_MEMDIE test alone is not sufficient in my opinion,
because we can't guarantee that the task will not do something it was frozen
to prevent it from doing.
I'm not sure about the cgroups freezing case, however.
Rafael
next prev parent reply other threads:[~2014-09-08 22:55 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-04 22:30 Cong Wang
2014-09-04 22:30 ` [Patch v4 2/2] freezer: remove obsolete comments in __thaw_task() Cong Wang
2014-09-05 9:45 ` Michal Hocko
2014-09-05 14:09 ` Tejun Heo
2014-09-05 14:08 ` [Patch v4 1/2] freezer: check OOM kill while being frozen Tejun Heo
2014-09-05 16:31 ` Cong Wang
2014-09-05 18:00 ` Tejun Heo
2014-09-05 18:12 ` Cong Wang
2014-09-05 22:45 ` Tejun Heo
2014-09-05 23:32 ` Rafael J. Wysocki
2014-09-08 17:40 ` Cong Wang
2014-09-08 20:54 ` Rafael J. Wysocki
2014-09-08 20:58 ` Cong Wang
2014-09-08 21:53 ` Rafael J. Wysocki
2014-09-08 22:22 ` Tejun Heo
2014-09-08 22:48 ` Rafael J. Wysocki
2014-09-08 22:50 ` Tejun Heo
2014-09-08 23:15 ` Rafael J. Wysocki [this message]
2014-09-08 23:00 ` Cong Wang
2014-09-08 23:23 ` Rafael J. Wysocki
2014-09-08 23:16 ` Cong Wang
2014-09-08 23:42 ` Rafael J. Wysocki
2014-09-08 23:29 ` Cong Wang
2014-09-08 23:59 ` Rafael J. Wysocki
2014-09-10 20:30 ` Cong Wang
2014-09-10 23:38 ` Rafael J. Wysocki
2014-09-10 23:20 ` Cong Wang
2014-09-11 16:30 ` Michal Hocko
2014-09-12 23:59 ` Tejun Heo
2014-09-14 16:43 ` Rafael J. Wysocki
2014-09-15 0:56 ` Tejun Heo
2014-09-15 3:34 ` Rafael J. Wysocki
2014-09-15 9:36 ` Michal Hocko
2014-09-16 22:55 ` Cong Wang
2014-09-22 8:21 ` Michal Hocko
2014-09-09 15:16 ` Michal Hocko
2014-09-09 15:23 ` Tejun Heo
2014-09-09 16:06 ` Michal Hocko
2014-09-09 16:46 ` Tejun Heo
2014-09-09 17:12 ` Michal Hocko
2014-09-09 20:53 ` Rafael J. Wysocki
2014-09-10 13:24 ` Michal Hocko
2014-09-11 13:08 ` Michal Hocko
2014-09-11 14:17 ` Rafael J. Wysocki
2014-09-11 14:04 ` Michal Hocko
2014-09-11 14:26 ` Rafael J. Wysocki
2014-09-11 14:10 ` Michal Hocko
2014-09-11 14:32 ` Rafael J. Wysocki
2014-09-11 14:28 ` Michal Hocko
2014-09-11 14:52 ` Rafael J. Wysocki
2014-09-11 14:45 ` Michal Hocko
2014-09-14 16:39 ` Rafael J. Wysocki
2014-09-12 23:48 ` Tejun Heo
2014-09-15 14:28 ` Michal Hocko
2014-09-16 5:56 ` Tejun Heo
2014-09-09 20:48 ` Rafael J. Wysocki
2014-09-10 5:21 ` Cong Wang
2014-09-05 16:43 ` Cong Wang
2014-09-05 16:54 ` Michal Hocko
2014-09-15 11:22 ` Michal Hocko
2014-09-16 22:58 ` Cong Wang
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