From: Michal Hocko <mhocko@kernel.org>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
akpm@linux-foundation.org, rientjes@google.com,
kwalker@redhat.com, skozina@redhat.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH -mm v2 1/3] mm/oom_kill: remove the wrong fatal_signal_pending() check in oom_kill_process()
Date: Fri, 2 Oct 2015 16:24:48 +0200 [thread overview]
Message-ID: <20151002142448.GC16302@dhcp22.suse.cz> (raw)
In-Reply-To: <20151002135756.GB28533@redhat.com>
On Fri 02-10-15 15:57:56, Oleg Nesterov wrote:
> On 10/02, Michal Hocko wrote:
> >
> > So clone without CLONE_THREAD should create a new thread group leader
> > and so create a new thread group.
>
> Yes.
>
> > Unless there is some other trickery
> > which I do not see right now for_each_thread from the parent task
> > shouldn't see those which are cloned without CLONE_THREAD.
>
> Yes.
>
> But I still do not understand what are you talking about, sorry ;)
yes this whole thing was off-topic and I am sorry to add more confusion
to it.
> So let me say just in case that coredump (namely zap_threads()) will
> also kill other thread groups with the same ->mm.
Yes, I wanted to make sure to clarify what the thread_group is supposed
to mean here but I only made it more confusing now that I am reading the
whole thing again. Sorry about that.
Calling processes which only share the mm as threads is confusing and
only obscures the discussion.
--
Michal Hocko
SUSE Labs
next prev parent reply other threads:[~2015-10-02 14:24 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-29 14:17 [PATCH -mm 0/3] mm/oom_kill: ensure we actually kill all tasks sharing the same mm Oleg Nesterov
2015-09-29 14:18 ` [PATCH -mm 1/3] mm/oom_kill: remove the wrong fatal_signal_pending() Oleg Nesterov
2015-09-29 22:36 ` David Rientjes
2015-09-30 1:42 ` Tetsuo Handa
2015-09-30 13:47 ` Oleg Nesterov
2015-09-30 15:20 ` [PATCH -mm 1/3] mm/oom_kill: remove the wrongfatal_signal_pending() Tetsuo Handa
2015-09-30 13:43 ` [PATCH -mm 1/3] mm/oom_kill: remove the wrong fatal_signal_pending() Oleg Nesterov
2015-09-29 14:18 ` [PATCH -mm 2/3] mm/oom_kill: cleanup the "kill sharing same memory" Oleg Nesterov
2015-09-29 22:39 ` David Rientjes
2015-09-30 13:49 ` Oleg Nesterov
2015-09-29 14:18 ` [PATCH -mm 3/3] mm/oom_kill: fix the wrong task->mm == mm checks in Oleg Nesterov
2015-09-29 22:41 ` David Rientjes
2015-09-30 13:50 ` Oleg Nesterov
2015-09-30 2:16 ` Tetsuo Handa
2015-09-30 13:59 ` Oleg Nesterov
2015-09-30 18:23 ` [PATCH -mm v2 0/3] mm/oom_kill: ensure we actually kill all tasks sharing the same mm Oleg Nesterov
2015-09-30 18:24 ` [PATCH -mm v2 1/3] mm/oom_kill: remove the wrong fatal_signal_pending() check in oom_kill_process() Oleg Nesterov
2015-09-30 21:14 ` David Rientjes
2015-10-01 10:52 ` [PATCH -mm v2 1/3] mm/oom_kill: remove the wrong fatal_signal_pending()check " Tetsuo Handa
2015-10-01 12:49 ` [PATCH -mm v2 1/3] mm/oom_kill: remove the wrong fatal_signal_pending() check " Michal Hocko
2015-10-01 15:00 ` Oleg Nesterov
2015-10-01 15:27 ` Michal Hocko
2015-10-01 15:41 ` Oleg Nesterov
2015-10-01 16:19 ` Michal Hocko
2015-10-01 17:53 ` Oleg Nesterov
2015-10-02 11:32 ` Tetsuo Handa
2015-10-02 12:11 ` Michal Hocko
2015-10-02 12:33 ` Tetsuo Handa
2015-10-02 13:32 ` Michal Hocko
2015-10-02 13:57 ` Oleg Nesterov
2015-10-02 14:24 ` Michal Hocko [this message]
2015-10-02 14:07 ` Tetsuo Handa
2015-10-02 14:15 ` Oleg Nesterov
2015-10-02 13:52 ` Oleg Nesterov
2015-10-02 14:36 ` Tetsuo Handa
2015-09-30 18:24 ` [PATCH -mm v2 2/3] mm/oom_kill: cleanup the "kill sharing same memory" loop Oleg Nesterov
2015-09-30 21:15 ` David Rientjes
2015-10-01 12:50 ` Michal Hocko
2015-09-30 18:24 ` [PATCH -mm v2 3/3] mm/oom_kill: fix the wrong task->mm == mm checks in oom_kill_process() Oleg Nesterov
2015-09-30 21:15 ` David Rientjes
2015-10-01 12:56 ` Michal Hocko
2015-10-01 22:24 ` Andrew Morton
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