From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758578AbbGHOqU (ORCPT ); Wed, 8 Jul 2015 10:46:20 -0400 Received: from mail-lb0-f179.google.com ([209.85.217.179]:34991 "EHLO mail-lb0-f179.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751621AbbGHOqQ (ORCPT ); Wed, 8 Jul 2015 10:46:16 -0400 Date: Wed, 8 Jul 2015 17:46:11 +0300 From: Cyrill Gorcunov To: Iago =?iso-8859-1?Q?L=F3pez?= Galeiras Cc: Jean Delvare , LKML , Djalal Harouni , Alban Crequy , Andrew Morton Subject: Re: config PROC_CHILDREN Message-ID: <20150708144611.GL2054@uranus> References: <20150703093918.75b98eb7@endymion.delvare> <55965195.6010602@endocode.com> <20150704190728.6a1b8a5a@endymion.delvare> <559D3134.1080603@endocode.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <559D3134.1080603@endocode.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jul 08, 2015 at 04:18:28PM +0200, Iago López Galeiras wrote: ... > > > That being said, I am curious... Is this interface so expensive that it > > really deserves a separate option, instead of always enabling it? This > > seems to be a fairly generic feature that a lot of scripts and tools > > could benefit from (starting with pstree I suppose.) > > I don't think I have enough information to answer that question. I'll CC Cyrill > Gorcunov and Andrew Morton. The interface is not expensive per-se but it was developed for checkpoint/restore in first place so we've been wrapping any new code created for this sake with CONFIG_. And we (criu team) were the only users of this interface at those days so it had lot of sence to keep it conditionally enabled.