From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: [PATCH BUGFIX RESEND 0/4] bfq: fix bugs breaking bandwidth guarantees occasionally To: Paolo Valente , Jens Axboe Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, ulf.hansson@linaro.org, broonie@kernel.org, linus.walleij@linaro.org, bfq-iosched@googlegroups.com, oleksandr@natalenko.name References: <20180625195537.7769-1-paolo.valente@linaro.org> From: =?UTF-8?Q?Holger_Hoffst=c3=a4tte?= Message-ID: <371643da-7465-91d8-6765-65905776be64@applied-asynchrony.com> Date: Tue, 26 Jun 2018 18:23:40 +0200 MIME-Version: 1.0 In-Reply-To: <20180625195537.7769-1-paolo.valente@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed List-ID: On 06/25/18 21:55, Paolo Valente wrote: > Hi, > during some bandwidth tests, I found some occasional but severe > malfunctions (losses of bandwidth control). The first three patches in > this series fix the bugs that caused these malfunctions. The last > patch is a fix/improvement of the name of one of the functions > involved with these bugs. > > I guess these patches are appropriate for next kernel release. Ran these overnight on 2 machines on top of recent BFQ and nothing caught on fire. One funny benchmark result stood out since it gave me (repeatedly!) 560 MB/s read bandwidth on an SSD which is rated to do "up to 550MB/s", so I guess BFQ's bandwidth guarantees are now really quite strong. :-) Therefore: Tested-by: Holger Hoffstätte cheers, Holger