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=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 AED2FC2BBC7 for ; Tue, 14 Apr 2020 09:51:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 86C512064A for ; Tue, 14 Apr 2020 09:51:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="viGb6zZa" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437894AbgDNJvZ (ORCPT ); Tue, 14 Apr 2020 05:51:25 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51728 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2437964AbgDNJvV (ORCPT ); Tue, 14 Apr 2020 05:51:21 -0400 Received: from mail-ed1-x543.google.com (mail-ed1-x543.google.com [IPv6:2a00:1450:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 095D2C072EDA; Tue, 14 Apr 2020 02:51:21 -0700 (PDT) Received: by mail-ed1-x543.google.com with SMTP id i7so16272422edq.3; Tue, 14 Apr 2020 02:51:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:reply-to:from:date:message-id :subject:to:cc; bh=rqmlYsX6Ig4L8f/9zje28ecRn6nWF5ISzXFA0f6dr0c=; b=viGb6zZafzgvsPdJTt7sP+eFNtVC8uu2+ZAIqSTgeeAvLzmPWA4CODCd0ljvR5Mkyj 0/DrJxUV+SG8Mssk8pLboXdVGKZuPVBoDFNOuM6LlPNcngb0k7P1C+W/OAA4qC1aiXjT W2iAGZGg9n06w5NyzaG3bAcQ6/9SwU1Npv91z70nN7ERPJC6eHX6QdBxqtZwXY54b289 QXJHAu9vZDTJ+2OuozqeK3srjPu4TNxPC68Ztmz4yQ+A8g+XitMb+MDfSF0GozO7ogeX SxRZYIIAQg77rcd3OLEM2jPtO0PwI62BqlpB/ktRuEMufdDDVie1GBJ+62ahrbGK84hR R8fQ== 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:reply-to :from:date:message-id:subject:to:cc; bh=rqmlYsX6Ig4L8f/9zje28ecRn6nWF5ISzXFA0f6dr0c=; b=tgUZwmAbrZjCF+6mqJCXlNmfrb6PNDsDSfHVaHv9RkQU/2kbrNNShfBsMfiFEGbuNF ekv1AAKPrJ19BO1D0PsncyvuYZyajcV6booW1qlH9UxfeVrhAnOg/0Ad8M+45nUrpnny RYAPVtX5jy9i2TlyvRYlk1ZAib5dGE/H39PoZXvFeaVSRmWTFmp2ic0ZEODhBI9zZAUF LVSVveNLh1ZUqOa2UNWvkoqv0ZCmP2zCtqobgAxOUTt07jJyj/dG+Mr+Z/g2si9Td6YV nhUvXGlwkp5OzF54MK2vQkPNd5gswu/txJeuHKzvdBjTigLHgS9N3s1RWPRWAH8fF8by Kxtw== X-Gm-Message-State: AGi0PubFsUtjNuEcjG3BcLsNfyCPHQ6Ooty7bp7+YsQ/049jXxL0sS7v gax6Ya4deHfXicmPp0Y3EOUFH0jtiBa4zXRFnCc= X-Google-Smtp-Source: APiQypKp8eHSjjE16jhChIfVgTCOhYk4SKLhW5qt7sQqopmQ2+MHareRjtFeA98UxsEX++pwQZfXhSUDGga/1kTQGPE= X-Received: by 2002:a17:906:add7:: with SMTP id lb23mr11378783ejb.6.1586857879752; Tue, 14 Apr 2020 02:51:19 -0700 (PDT) MIME-Version: 1.0 References: <96bedbaf-49ea-f24b-b7b1-fb9a57fb6c7d@gmail.com> <20200411154031.642557-1-avagin@gmail.com> <20200413154746.39275d0981f69e57a7ecab3e@linux-foundation.org> In-Reply-To: <20200413154746.39275d0981f69e57a7ecab3e@linux-foundation.org> Reply-To: mtk.manpages@gmail.com From: "Michael Kerrisk (man-pages)" Date: Tue, 14 Apr 2020 11:51:08 +0200 Message-ID: Subject: Re: [PATCH v2] timens: show clock symbolic names in /proc/pid/timens_offsets To: Andrew Morton Cc: Andrei Vagin , Thomas Gleixner , Linux API , lkml , "Eric W . Biederman" , Dmitry Safonov <0x7f454c46@gmail.com> Content-Type: text/plain; charset="UTF-8" Sender: linux-api-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-api@vger.kernel.org On Tue, 14 Apr 2020 at 00:47, Andrew Morton wrote: > > On Sun, 12 Apr 2020 07:51:47 +0200 "Michael Kerrisk (man-pages)" wrote: > > > Hi Andrei, > > > > On Sat, 11 Apr 2020 at 17:40, Andrei Vagin wrote: > > > > > > Michael Kerrisk suggested to replace numeric clock IDs on symbolic > > > names. > > > > > > Now the content of these files looks like this: > > > $ cat /proc/774/timens_offsets > > > monotonic 864000 0 > > > boottime 1728000 0 > > > > Thanks. > > > > Assuming no-one has objections to the patch, please do mark for stable@. > > > > `grep -r timens_offsets Documentation' comes up blank. Is > /proc/pid/timens_offsets documented anywhere? If not, it should be! > And this patch should update that documentation. > > I assume the time namespace feature itself is documented under clone(2)? We're good, so far. There's time_namespaces(7) [1] and documentation of CLONE_NEWTIME in unshare(2) [2]. CLONE_NEWTIME support for clone3() is still a work in progress [3]. Thanks, Michael [1] http://man7.org/linux/man-pages/man7/time_namespaces.7.html [2] http://man7.org/linux/man-pages/man2/unshare.2.html [3] https://lore.kernel.org/lkml/20200317083043.226593-1-areber@redhat.com/ -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/