From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-by2nam03on0078.outbound.protection.outlook.com ([104.47.42.78]:61388 "EHLO NAM03-BY2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751599AbcKOTxs (ORCPT ); Tue, 15 Nov 2016 14:53:48 -0500 Subject: Re: [PATCH V4 00/15] blk-throttle: add .high limit To: Shaohua Li , Bart Van Assche References: <986ada43-3217-3277-724a-5c76f8dad74e@sandisk.com> <20161115000529.GA15160@shli-mbp.local> <20161115004922.GA16173@shli-mbp.local> <1bf8605a-9920-19ea-e2ab-2f3d747e55be@sandisk.com> <20161115012857.GA17239@shli-mbp.local> CC: "linux-block@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "Kernel-team@fb.com" , "axboe@fb.com" , "tj@kernel.org" , "vgoyal@redhat.com" From: Bart Van Assche Message-ID: <6f33c69f-f382-1515-d83d-f1109f982ab3@sandisk.com> Date: Tue, 15 Nov 2016 11:53:39 -0800 MIME-Version: 1.0 In-Reply-To: <20161115012857.GA17239@shli-mbp.local> Content-Type: text/plain; charset="windows-1252"; format=flowed Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org On 11/14/2016 05:28 PM, Shaohua Li wrote: > On Mon, Nov 14, 2016 at 05:18:28PM -0800, Bart Van Assche wrote: >> Unless someone can convince me of the opposite I think that coming up with >> an algorithm for estimating I/O cost is essential to guarantee I/O fairness >> without requesting users to perform complicated parameter configurations. > > That's what I tried before: > http://marc.info/?l=linux-kernel&m=145617863208940&w=2 That URL refers to v2 of this patch series. Sorry but I have not found the I/O cost estimation algorithm I was referring to in v2 of this patch series. Bart.