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=-2.3 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FAKE_REPLY_C,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT 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 2FA35C43381 for ; Wed, 20 Mar 2019 20:07:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C7F4621841 for ; Wed, 20 Mar 2019 20:07:08 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="FVKbo80S" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727336AbfCTUHH (ORCPT ); Wed, 20 Mar 2019 16:07:07 -0400 Received: from mail-wm1-f51.google.com ([209.85.128.51]:38757 "EHLO mail-wm1-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726123AbfCTUHH (ORCPT ); Wed, 20 Mar 2019 16:07:07 -0400 Received: by mail-wm1-f51.google.com with SMTP id a188so477257wmf.3 for ; Wed, 20 Mar 2019 13:07:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=i2CZ2h17IUTfC8WxVSpqJhUQ56dM9AQtPWmIlXcrDl0=; b=FVKbo80SI+42LmCHZJvOHvWzk7+b+wBTJiKEPa48rO5HujMlpo8/QojQ9YJP+FxMI3 B+pstJUepqfPEIF1YmgWFtMh+Zpumje1ueefKQcVSoZyETP2Un19mhENRFGcHpFQz9AN vwbJIc34yf9eIYdFWHN4A+9IPuEQAyH37Lz5+PkeibNaAW1FpVxCSxtCyaTjlKjHOkZP 3ODi9QP6wlC5m+dDpSNnBd7z1hPXL5maAayR7pq9fkvr1m3wqOkJnC1+V4SCjP5dhNCm LARIurLqd0rhV2Wfmb/I7Sw6Tu6m83NBQdAaL2iXqKXQBuX63Cl49/X9aMwq68QTJtAy cJ+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=i2CZ2h17IUTfC8WxVSpqJhUQ56dM9AQtPWmIlXcrDl0=; b=BAHaayWDkW3MCgDFwx4EqCKO6nzv1Nd3KdjWixyHlne8UkB3L57HTZwjHpWDemvxDv 8llY7tKbO+SSJmTwiSovQcNvYcv6jhXBnKSUc7Uxyr+APuBoBQZjf1Or4X2RC1VM0zsF Ar+1qlPaolB5z4mnuB0YiWcMijS72GNBPQ1Af6o/nT0j5wr5VbIl0v/zKkPTZKY0pFYt E2oLcAd+smlSu55SXB8wZyaz2cDsffofvwYu46ikeYyLD6WOYsguaTOigyNWpyzisF/r bJ9mqZpLSKocoztasyQJxZyotL0Mnl2IYJu/K+EYefIbw6jTJPrQHvtkI1iKmSzBM8SN hGHQ== X-Gm-Message-State: APjAAAXc7HSpjmSkBeATTz+0dYfxeY1PGYtftu7UOCjSBmlACXuTX/UU l0NpL2G6qXXRrcBk0cfDZw== X-Google-Smtp-Source: APXvYqzTXph3URt/BZzlcgWs8a2s/GSn/LjXj6+fgVo/FylUSSi2NBrXK8ee2H8Q7du6WthYmKtdlg== X-Received: by 2002:a1c:66c2:: with SMTP id a185mr64553wmc.139.1553112425351; Wed, 20 Mar 2019 13:07:05 -0700 (PDT) Received: from avx2 ([46.53.240.229]) by smtp.gmail.com with ESMTPSA id f20sm6715964wrg.91.2019.03.20.13.07.04 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 20 Mar 2019 13:07:04 -0700 (PDT) Date: Wed, 20 Mar 2019 23:07:02 +0300 From: Alexey Dobriyan To: christian@brauner.io Cc: linux-kernel@vger.kernel.org, dancol@google.com, joel@joelfernandes.org, luto@kernel.org Subject: Re: pidfd design Message-ID: <20190320200702.GA27111@avx2> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > 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.