From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754740AbdJIP4C (ORCPT ); Mon, 9 Oct 2017 11:56:02 -0400 Received: from mail-io0-f170.google.com ([209.85.223.170]:53013 "EHLO mail-io0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754497AbdJIP4A (ORCPT ); Mon, 9 Oct 2017 11:56:00 -0400 X-Google-Smtp-Source: AOwi7QCbleRDP7E8KpuusT8SdoDP2PCWisqq/Fdr8HsIBCZZYr7/VJPZQO5q/PgXu6aa7lfbvZJlNg== Subject: Re: [PATCH BUGFIX] block, bfq: fix bug related to the burst_size counter To: Paolo Valente Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, ulf.hansson@linaro.org, broonie@kernel.org, lee.tibbert@gmail.com, oleksandr@natalenko.name, angeloruocco90@gmail.com, philm@manjaro.org References: <20171009111123.2961-1-paolo.valente@linaro.org> From: Jens Axboe Message-ID: Date: Mon, 9 Oct 2017 09:55:58 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0 MIME-Version: 1.0 In-Reply-To: <20171009111123.2961-1-paolo.valente@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/09/2017 05:11 AM, Paolo Valente wrote: > Hi Jens, > unfortunately, the patch "block, bfq: decrease burst size when queues > in burst exit", queued for 4.15 [1] introduces a bug, described in > detail in the commit message of this patch. If triggered, this bug may > cause loss of control on I/O-request service order. Applied, but please remember to add a Fixes line when you have a patch that fixes a problem introduced by a previous patch. For this one, I added: Fixes: 7cb04004fa37 ("block, bfq: decrease burst size when queues in burst exit") -- Jens Axboe