From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A45FDC43381 for ; Wed, 20 Mar 2019 20:14:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 61B3D21873 for ; Wed, 20 Mar 2019 20:14:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="SUGkr8+U" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727197AbfCTUOP (ORCPT ); Wed, 20 Mar 2019 16:14:15 -0400 Received: from mail-vs1-f41.google.com ([209.85.217.41]:33538 "EHLO mail-vs1-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726023AbfCTUOO (ORCPT ); Wed, 20 Mar 2019 16:14:14 -0400 Received: by mail-vs1-f41.google.com with SMTP id z6so2347092vsc.0 for ; Wed, 20 Mar 2019 13:14:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=1zZeT05whuybyDrapIV48mjlbNFtb37A7qCqc56yIGc=; b=SUGkr8+U8A+feG+he2GxGRPbRli9k4Lhvgdv4UNdAn+BCYrH5B3S63+f/E6Lig0jaM r00scBwv/I0DzUltES4SZEQtSaNqC29J0eY7D6geCUAx9nsBaauXBr20uLsd0hEMxcEL Vay7kVd8DQQsYp7UzkNgtAcM14pklSRg/umAUagtAoz92ul0FaLcZ4S6MVjzDU+k5oa+ wf7Lwp2oGoMc2clGMZV0T8xyYoiwPtmTYmbWPfJGQCUTA1TBUv1AK2M5/txBZesOA6hJ d4KZ+Hl0VsZfFQeIAV8lBCYCWEJbLGP5WkgeM6y2yqGwcViZLoIVoauwdZZLE+Tpmcnl woCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=1zZeT05whuybyDrapIV48mjlbNFtb37A7qCqc56yIGc=; b=ThO+SvFWm9qaFkKHGfCVmP7HClC27EVetyemZO8j7wrVJnbCsXDEkaeBdXcK1LWE9A gOW7xT4EjqawrQMcM9Lpz/gu7dEQmQgUJJzmgSebalBMV4XWiDHntK1L9kxsUMDv6atr +cXsIU4HsplJ4X8tt1x9ZPIKRNyfoquhFcUan7N3I8jd/sOvj7GB0daWQLczBZUsHIoX WDZCfDbyEqFEtciSjRKEJQ/6YEidYaMQ5M9/FduSOIEHfKjDkAc5FI/SCRwO7L/YWDcY 7M+mo+xPMuZX3KJdy6bzuXd0IAjzITDha08ZitSvGxYEaZSa9VChtvtWaXxJvMnvKVmh tr+w== X-Gm-Message-State: APjAAAXAOhAXLxQOghBwVnYV2BpYuq5S5XlQjzcXW6i0T2WchUK1j7if 901fvy0ZPFNR/edBxhHPutLIiz/zVTGquCCR14wj9A== X-Google-Smtp-Source: APXvYqzCKV4kWTMTbPXuuKqt9OegK7bxr5tEfXXQ98F+iCM1BgVxys2D/Rv4dbV9SeGGjIRcQihGVz+sVqqVnfCMSx8= X-Received: by 2002:a67:f353:: with SMTP id p19mr6248659vsm.114.1553112853311; Wed, 20 Mar 2019 13:14:13 -0700 (PDT) MIME-Version: 1.0 References: <20190320200702.GA27111@avx2> In-Reply-To: <20190320200702.GA27111@avx2> From: Daniel Colascione Date: Wed, 20 Mar 2019 13:14:01 -0700 Message-ID: Subject: Re: pidfd design To: Alexey Dobriyan Cc: Christian Brauner , linux-kernel , Joel Fernandes , Andy Lutomirski Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 20, 2019 at 1:07 PM Alexey Dobriyan wrote: > > What would be your opinion to having a > > /proc//handle > > file instead of having a dirfd. > > This is even worse than depending on PROC_FS. Just for the dependency > pidfd code should be backed out immediately. Forget about /proc. We already have pidfds, and we've had them since /proc was added ages ago. Backing out procfs is a bold proposal.