From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Mon, 7 Nov 2016 14:26:08 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>,
        Tejun Heo <tj@kernel.org>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        Pavel Machek <pavel@ucw.cz>, "Oleg Nesterov" <oleg@redhat.com>,
        <linux-pm@vger.kernel.org>, <linux-fsdevel@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <stable@vger.kernel.org>
Subject: Re: [PATCH] coredump: fix unfreezable coredumping task
Message-Id: <20161107142608.e4fa032b2e32b623663ff2e9@linux-foundation.org>
In-Reply-To: <1475225434-3753-1-git-send-email-aryabinin@virtuozzo.com>
References: <1475225434-3753-1-git-send-email-aryabinin@virtuozzo.com>
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On Fri, 30 Sep 2016 11:50:34 +0300 Andrey Ryabinin <aryabinin@virtuozzo.com> wrote:

> It could be not possible to freeze coredumping task when it waits
> for 'core_state->startup' completion, because threads are frozen
> in get_signal() before they got a chance to complete 'core_state->startup'.
> 
> Use freezer_do_not_count() to tell freezer to ignore coredumping
> task while it waits for core_state->startup completion.
> 
> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
> Cc: stable@vger.kernel.org

The changelog provides no reason why this patch should be merged into
-stable.  Nor into anything else, really.

Please (as always) provide a full description of the bug's end-user
visible effects.