From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1754521AbcFHWsr (ORCPT <rfc822;w@1wt.eu>);
	Wed, 8 Jun 2016 18:48:47 -0400
Received: from mail-pf0-f180.google.com ([209.85.192.180]:36236 "EHLO
	mail-pf0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S1753106AbcFHWsp (ORCPT
	<rfc822;linux-kernel@vger.kernel.org>);
	Wed, 8 Jun 2016 18:48:45 -0400
Date: Wed, 8 Jun 2016 15:48:42 -0700 (PDT)
From: David Rientjes <rientjes@google.com>
X-X-Sender: rientjes@chino.kir.corp.google.com
To: Oleg Nesterov <oleg@redhat.com>
cc: Andrew Morton <akpm@linux-foundation.org>,
        Michal Hocko <mhocko@kernel.org>,
        Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] proc_oom_score: remove tasklist_lock and pid_alive()
In-Reply-To: <20160608211921.GA15508@redhat.com>
Message-ID: <alpine.DEB.2.10.1606081548300.12203@chino.kir.corp.google.com>
References: <20160608211921.GA15508@redhat.com>
User-Agent: Alpine 2.10 (DEB 1266 2009-07-14)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Wed, 8 Jun 2016, Oleg Nesterov wrote:

> This was needed before to ensure that ->signal != 0 and do_each_thread()
> is safe, see the commit b95c35e76b29b for details.
> 
> Today tsk->signal can't go away and for_each_thread(tsk) is always safe.
> 
> Signed-off-by: Oleg Nesterov <oleg@redhat.com>

Acked-by: David Rientjes <rientjes@google.com>