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=-3.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=unavailable 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 6D90DC43387 for ; Thu, 27 Dec 2018 23:42:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1118720869 for ; Thu, 27 Dec 2018 23:42:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1545954125; bh=k6p7gJ05xPVEAlLpXeuRETqv2Lu6OouHV4sFMd/s5k0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=JLKQUaGCNpe3f5xxZaTk+Xea3LD/1Xn3co2K4VY6HmL8j5746hIYIZqaWnEpx9JQa BYEtT2Nhz5U0mBreAauhJf/veLugCSQlT0gnkoo2NjvVpi5VYnNxDtfzc3oGeXfkHW ylxHTssld8pDdoIF70xdoCp/+TTHBgDUwKXFaDUI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733224AbeL0Xlu (ORCPT ); Thu, 27 Dec 2018 18:41:50 -0500 Received: from mail-yb1-f196.google.com ([209.85.219.196]:40510 "EHLO mail-yb1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727907AbeL0Xlu (ORCPT ); Thu, 27 Dec 2018 18:41:50 -0500 Received: by mail-yb1-f196.google.com with SMTP id x201so4030458ybg.7; Thu, 27 Dec 2018 15:41:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=xXBTIXHVAax3PJVgWEmGAt722IyPRVkq/7ftu76zskQ=; b=nHfNQX9WXbd4v1mYIWQy9AJqEYEykYb6VEtomgVx398VGjNDSzl1QME1bez7OOt2Vw wSqtfmtGl2Gc9HatZWi/yVq3upLi8AJolttyrb0KzXCS+OGY+dsUPieA7cy199UNekp4 pPzQcLgMIGp1H+wAlId3XaC5phb2GrqvWxY1ZIOjP23OxnhDaIA9C1IPYlXkYoNBwQar u97YBGsc2chKeilI6xnMZ2oVYWXKbWOi3ucrHJkfmRlc/JnJHq8WVIyDoQwGTM3iGhbM Q5PIgAeFdI4adTRai6O64MmXbIFRr0EhhZ06navKwHiU5mFIpXG+ofq4TJkz89aleImg XvsQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to:user-agent; bh=xXBTIXHVAax3PJVgWEmGAt722IyPRVkq/7ftu76zskQ=; b=nqcIdhueK6hjdrT6g/ts6tPodjw7mu1CWs8PYNjm2RJUZGAlOUgXgvb46sLWtNkuu6 Xt+t3W+/2JBFkRV4VrGbTpBpWPBdxGAVxUbN+L//4aE8DMkWn+/WaC+zBtgt5bhOtJuZ kzeI8qcMvZOqRFdYmJ4JbPJmmEyLXeDW8VP7v06dh2VR4l07tHsQl0Y+YAFeef5oAeUN /8rV0Tkb0N3rCegV33Se/vr1DmfUhH/0aqalGxR04Ny9NHcdws9M/SlY97KQGlRa4ZLs zlRocP0yQ60vXyvUplzwGA4xq5dpQV6rVQRJJJg2o7l0dcFvW3+teAI2/8SMXQuniR6A 1nlQ== X-Gm-Message-State: AJcUukf1IyJbM/FHIPP6Qa3QM+bInzbtfzKjhN2rfIhtgvtyT52C529p fsnCE0HAavJKt3mHvBSEdFg= X-Google-Smtp-Source: AFSGD/VzIZXeDLBlBNwHflUwXYh0UgkX4wlTAZfzxQkH57xCRgOFqGov3CIUJ2Go8/Y5FqpPwM9LCA== X-Received: by 2002:a25:15c1:: with SMTP id 184-v6mr25095796ybv.332.1545954108520; Thu, 27 Dec 2018 15:41:48 -0800 (PST) Received: from localhost ([2620:10d:c091:180::1:7729]) by smtp.gmail.com with ESMTPSA id z186sm21072531ywd.107.2018.12.27.15.41.46 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 27 Dec 2018 15:41:47 -0800 (PST) Date: Thu, 27 Dec 2018 15:41:44 -0800 From: Tejun Heo To: Paolo Valente Cc: bfq-iosched@googlegroups.com, Angelo Ruocco , Jens Axboe , Greg Kroah-Hartman , Li Zefan , Angelo Ruocco , Dennis Zhou , Josef Bacik , Liu Bo , Bart Van Assche , Johannes Weiner , linux-block , linux-kernel , Ulf Hansson , Linus Walleij , broonie@kernel.org, oleksandr@natalenko.name, cgroups@vger.kernel.org, linux-doc@vger.kernel.org, Jonathan Corbet Subject: Re: [PATCH V2 00/10] unify the interface of the proportional-share policy in blkio/io Message-ID: <20181227234144.GE2509588@devbig004.ftw2.facebook.com> References: <20181120162816.GV2509588@devbig004.ftw2.facebook.com> <25296DAE-73EC-46CC-9A98-A8B7E9017BB7@linaro.org> <7D7FAB43-5F62-4402-A9B3-E7C2E30AE680@linaro.org> <20181130184256.GI2509588@devbig004.ftw2.facebook.com> <5534B7D4-A5D9-4F44-9620-970A7F9EC140@linaro.org> <874A0232-2103-4364-BD88-F33B85D6A764@linaro.org> <20181218164126.GX2509588@devbig004.ftw2.facebook.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, Paolo. On Sun, Dec 23, 2018 at 12:00:14PM +0100, Paolo Valente wrote: > 4.21 is coming ... and the legacy proportional share interface will > be gone with cfq. This will break legacy code using the > proportional-share interface on top of bfq. This code may just fail > when trying to use interface files that don't exist any longer. Sounds like inheriting .cfq namespace would be the easiest. Would that work? Thanks. -- tejun