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=-7.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 A69B9C6369E for ; Wed, 18 Nov 2020 16:59:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E54D2168B for ; Wed, 18 Nov 2020 16:59:04 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=6wind.com header.i=@6wind.com header.b="WNrGUqhH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727505AbgKRQ6o (ORCPT ); Wed, 18 Nov 2020 11:58:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33982 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727005AbgKRQ6n (ORCPT ); Wed, 18 Nov 2020 11:58:43 -0500 Received: from mail-wm1-x342.google.com (mail-wm1-x342.google.com [IPv6:2a00:1450:4864:20::342]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1AA73C0613D4 for ; Wed, 18 Nov 2020 08:58:43 -0800 (PST) Received: by mail-wm1-x342.google.com with SMTP id 1so3373986wme.3 for ; Wed, 18 Nov 2020 08:58:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind.com; s=google; h=reply-to:subject:to:cc:references:from:organization:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=OytZM9hptUdqtMzFdTg4WEZizJON99Eg20ghykuO9vc=; b=WNrGUqhHS4yZ/pEL+CxEc5saR+1VXRMaC+JB5Eo34fMw+1U319UKbGToZScnXSKe+q wA1k2m8Q1MWZiltsu8Fo6kDt7CENeMcPw/nCBz66dZWQ6spIm6b8URGWkI6Ud+8Vdqkf +oECZih6Na8JcDVeQBxoWIXQYGXCt6Hl+cZJbpkNhEiAT8OPX+EvZwwsZ+nEQKEDyBJX av/gTZMAbbbCPBAGlH6AXxfqvBzvyXPval3fgCKeaTabFhOmukmyKilg3RV1dB0yNq48 eCcU+46hrLQDMq2HEPQU8mkHTRGR52odDTUS/A7mlqWiX1PgSqe1wZ/g06x8uzuBTz7S ATIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:reply-to:subject:to:cc:references:from :organization:message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=OytZM9hptUdqtMzFdTg4WEZizJON99Eg20ghykuO9vc=; b=AvVeVMlyEh+2HLM7yR7rRuppVqMiPfmLtpilb1W/+j3Bs7j0PA+zvq4FWnflCQn2/h 0He8PviuVqBHrl5UxpnD6zzsdvPl9l8GHBkpddoGpG9wmKclQqovIFIkKQkjMhkEPKeN R7q4UfhW2USP97t2Ue5dwAZ0iK1MsX8YdORTl9W07jCse3Wp3s6qc2NkVAmXF0yuP5yL qT9wHAtQdn2xholbn8DyxDoxJFNZ1j5KOjPHh/bDSVO99c9ZMIeX4Efz+7vz80XHChBQ s3nXqfNn/jF+BLxgItGri+9JrwqLt9Y4lT8+4z+9ezrwRNpt7rKFlBrVqBDQ3OqNMnqP +4bQ== X-Gm-Message-State: AOAM530CPwR5JYl0Dc7JVXQ9LIbNyB4FkSTt5OL71kRNB4EjygmnXbZv V29i3XvyGkgofUcmbrL/4VnF3g== X-Google-Smtp-Source: ABdhPJzmP2nVMybvb5jiiNCLz0yOAMvMCp/v8aKfzwDUpeZe4ei7pclGFqXCekzBLYwSbiiX2b3qFA== X-Received: by 2002:a1c:4d0f:: with SMTP id o15mr15589wmh.142.1605718721834; Wed, 18 Nov 2020 08:58:41 -0800 (PST) Received: from ?IPv6:2a01:e0a:410:bb00:580d:332b:4e93:1d8a? ([2a01:e0a:410:bb00:580d:332b:4e93:1d8a]) by smtp.gmail.com with ESMTPSA id w10sm35477290wra.34.2020.11.18.08.58.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 18 Nov 2020 08:58:40 -0800 (PST) Reply-To: nicolas.dichtel@6wind.com Subject: Re: [PATCH net-next] net-loopback: allow lo dev initial state to be controlled To: David Ahern , =?UTF-8?B?TWFoZXNoIEJhbmRld2FyICjgpK7gpLngpYfgpLYg4KSs4KSC4KSh4KWH4KS14KS+?= =?UTF-8?B?4KSwKQ==?= , Ido Schimmel Cc: Jakub Kicinski , Jian Yang , David Miller , linux-netdev , Jian Yang , Eric Dumazet References: <20201111204308.3352959-1-jianyang.kernel@gmail.com> <20201114101709.42ee19e0@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> <20201116123447.2be5a827@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> <20201117171830.GA286718@shredder.lan> From: Nicolas Dichtel Organization: 6WIND Message-ID: <7e16f1f3-2551-dff5-8039-bcede955bbfc@6wind.com> Date: Wed, 18 Nov 2020 17:58:39 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Le 18/11/2020 à 02:12, David Ahern a écrit : [snip] > If there is no harm in just creating lo in the up state, why not just do > it vs relying on a sysctl? It only affects 'local' networking so no real > impact to containers that do not do networking (ie., packets can't > escape). Linux has a lot of sysctl options; is this one really needed? > +1 And thus, it will benefit to everybody.