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Fri, 19 Jan 2018 07:16:10 -0500 Received: from mail-ot0-f196.google.com ([74.125.82.196]:46612 "EHLO mail-ot0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751200AbeASMQJ (ORCPT ); Fri, 19 Jan 2018 07:16:09 -0500 X-Google-Smtp-Source: ACJfBouWETYCAr82wGriH8pe/7utll2FyJUX4NrW6mU0MRjxsBI1WGtcDEYPqqfZTdyTYZLB9Z/1YA== Subject: Re: [PATCH 4.4 045/115] sched/deadline: Throttle a constrained deadline task activated after the deadline To: Greg Kroah-Hartman , Ben Hutchings Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, "Peter Zijlstra (Intel)" , Juri Lelli , Linus Torvalds , Luca Abeni , Mike Galbraith , Romulo Silva de Oliveira , Steven Rostedt , Thomas Gleixner , Tommaso Cucinotta , Ingo Molnar , Sasha Levin References: <20171218152851.886086917@linuxfoundation.org> <20171218152855.351654393@linuxfoundation.org> <1516323645.3417.5.camel@codethink.co.uk> <20180119075304.GE25687@kroah.com> From: Daniel Bristot de Oliveira Message-ID: Date: Fri, 19 Jan 2018 13:16:01 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: <20180119075304.GE25687@kroah.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On 01/19/2018 08:53 AM, Greg Kroah-Hartman wrote: > On Fri, Jan 19, 2018 at 01:00:45AM +0000, Ben Hutchings wrote: >> On Mon, 2017-12-18 at 16:48 +0100, Greg Kroah-Hartman wrote: >>> 4.4-stable review patch.  If anyone has any objections, please let me >>> know. >>> >>> ------------------ >>> >>> From: Daniel Bristot de Oliveira >>> >>> >>> [ Upstream commit df8eac8cafce7d086be3bd5cf5a838fa37594dfb ] >> [...] >> >> I think this needs another fix on top: >> >> commit ae83b56a56f8d9643dedbee86b457fa1c5d42f59 >> Author: Xunlei Pang >> Date:   Wed May 10 21:03:37 2017 +0800 >> >>     sched/deadline: Zero out positive runtime after throttling constrained tasks > > Now queued up, thanks. > >> There's another fix related to this, but it doesn't appear to fix a >> regression and I don't know how critical it is: >> >> commit 3effcb4247e74a51f5d8b775a1ee4abf87cc089a >> Author: Daniel Bristot de Oliveira >> Date:   Mon May 29 16:24:03 2017 +0200 >> >>     sched/deadline: Use the revised wakeup rule for suspending constrained dl tasks > > I'll hold off on this one until someone actually asks for it, as it's a > big change. > > thanks again for the review, Hi, This fix is also needed. Do you guys need some help in the backport? if so, please let me know! I will be glad to help. -- Daniel > > greg k-h >