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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 46B5CC64EBC for ; Thu, 4 Oct 2018 15:11:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1641020652 for ; Thu, 4 Oct 2018 15:11:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1641020652 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=acm.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727679AbeJDWEn (ORCPT ); Thu, 4 Oct 2018 18:04:43 -0400 Received: from mail-pg1-f194.google.com ([209.85.215.194]:43231 "EHLO mail-pg1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727355AbeJDWEm (ORCPT ); Thu, 4 Oct 2018 18:04:42 -0400 Received: by mail-pg1-f194.google.com with SMTP id 80-v6so3283764pgh.10; Thu, 04 Oct 2018 08:11:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:mime-version:content-transfer-encoding; bh=q2W8R1FFLUHNquwmu9Iew0zKD9sT9pbfhuPUxwlu5Rw=; b=nFBzMvoaiBZ/LOYd5vlFCQfMZiiEAWe/tm+dp7ZQtocDC8NZQHKwfeWPN8Vm5HKejd 8MoUtRLe5GUbaHo8uLCJaoNT+vdD0dex2sh01WJwZuASI4SGt6dT+/vUSTaPqcdaqMu5 A5pPZRSJ7HHG989k0QOj50okW0l4UUnxFF2IHQhvnt4j4zd8WkP/Oo+KGbarlV1a55IC YYuunGLOegwq0w9Tohl+mMDxCZm94CXj1LPr2Xx21nCkuh8KQb3pNG67XKmSvn+tvvMm +LOW6mnAaLdG+xAtpx7Q0j1Bx19Vzff2+K9enKhg4TEeEEnIF1thkxQ+UjdaaRVxj42x T1eg== X-Gm-Message-State: ABuFfoim3W7NTTfv5XX/6wbscNoQiysnHoBeu/1q3fyG2Ip5XsZkAAjv 8YeRPXgCe5iAVDKJEomqiikw+ahQkyH9CA== X-Google-Smtp-Source: ACcGV62hRK5soVGadZevmYUKJmSC+/+0jFdhdwHSTio0dj6SuucY0nQjNmMS7q8ZqgUWV2KvfnxAOw== X-Received: by 2002:a63:78cc:: with SMTP id t195-v6mr6136665pgc.329.1538665859979; Thu, 04 Oct 2018 08:10:59 -0700 (PDT) Received: from ?IPv6:2620:15c:2cd:203:5cdc:422c:7b28:ebb5? ([2620:15c:2cd:203:5cdc:422c:7b28:ebb5]) by smtp.gmail.com with ESMTPSA id r205-v6sm11437839pgr.11.2018.10.04.08.10.58 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 04 Oct 2018 08:10:59 -0700 (PDT) Message-ID: <1538665857.230807.1.camel@acm.org> Subject: Re: [PATCH] block: BFQ default for single queue devices From: Bart Van Assche To: Mark Brown , Linus Walleij Cc: oleksandr@natalenko.name, Paolo Valente , Jens Axboe , linux-block , linux-mmc , linux-mtd@lists.infradead.org, Pavel Machek , Ulf Hansson , Richard Weinberger , Artem Bityutskiy , Adrian Hunter , Jan Kara , aherrmann@suse.com, mgorman@suse.com, Chunyan Zhang , "linux-kernel@vger.kernel.org" , bfq-iosched@googlegroups.com Date: Thu, 04 Oct 2018 08:10:57 -0700 In-Reply-To: <20181004101305.GA6412@sirena.org.uk> References: <20181002124329.21248-1-linus.walleij@linaro.org> <05fdbe23-ec01-895f-e67e-abff85c1ece2@kernel.dk> <1eca41df95ff660eb247a3de666adeb4@natalenko.name> <20181004101305.GA6412@sirena.org.uk> Content-Type: text/plain; charset="UTF-7" X-Mailer: Evolution 3.26.2-1 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2018-10-04 at 11:13 +-0100, Mark Brown wrote: +AD4 On Thu, Oct 04, 2018 at 10:14:38AM +-0200, Linus Walleij wrote: +AD4 +AD4 +AD4 And these are millions and millions of deployed +AD4 +AD4 systems not using udev+-systemd we are talking about, +AD4 +AD4 they are not fringe hobby projects. It's not that I +AD4 +AD4 personally dislike udev or anything, I kind of like +AD4 +AD4 it, but these tailored distros simply don't use it +AD4 +AD4 and they are huge in numbers. They need help to do +AD4 +AD4 the right thing. Fixing a udev rule doesn't solve +AD4 +AD4 even half the world's problems I'm afraid. +AD4 +AD4 Further, even those embedded systems that do use udev (some of them do +AD4 lean heavily on modern init stuff like that and systemd, especially when +AD4 boot time is a priority) they'll still need to get the relevant udev +AD4 rule installed somehow. Hi Mark, Are you aware that the systemd source tree includes a set of udev rules? See also https://github.com/systemd/systemd/tree/master/rules. Bart.