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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Sun, 8 Dec 2019 05:58:04 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xB85w4vN56295506 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 8 Dec 2019 05:58:04 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EAA9B4C04A; Sun, 8 Dec 2019 05:58:03 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 36C494C046; Sun, 8 Dec 2019 05:57:59 +0000 (GMT) Received: from localhost.localdomain (unknown [9.85.71.101]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Sun, 8 Dec 2019 05:57:59 +0000 (GMT) Subject: Re: [RFC 0/3] Introduce per-task latency_tolerance for scheduler hints To: Dietmar Eggemann , Valentin Schneider Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, mingo@redhat.com, vincent.guittot@linaro.org, patrick.bellasi@matbug.net, qais.yousef@arm.com, pavel@ucw.cz, dhaval.giani@oracle.com, qperret@qperret.net, David.Laight@ACULAB.COM, morten.rasmussen@arm.com, pjt@google.com, tj@kernel.org, viresh.kumar@linaro.org, rafael.j.wysocki@intel.com, daniel.lezcano@linaro.org References: <20191125094618.30298-1-parth@linux.ibm.com> <450fc7e2-49d5-d809-281f-7d9a99d3e530@arm.com> <838f233e-fa4c-d5a3-9b50-69e2e121edda@arm.com> <5c5b61fa-e8f7-5aa7-0fe0-91cb0d4736fb@linux.ibm.com> <1cc0a6a4-85e9-4b53-7139-261558682582@arm.com> From: Parth Shah Date: Sun, 8 Dec 2019 11:27:58 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <1cc0a6a4-85e9-4b53-7139-261558682582@arm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 x-cbid: 19120805-0016-0000-0000-000002D2BAC1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19120805-0017-0000-0000-00003334C8D7 Message-Id: <0936f3e7-8aa7-67f4-4262-48346367a522@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-12-07_08:2019-12-05,2019-12-07 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 mlxlogscore=788 lowpriorityscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 phishscore=0 bulkscore=0 clxscore=1015 adultscore=0 spamscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1912080053 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/6/19 6:01 PM, Dietmar Eggemann wrote: > On 05.12.19 18:13, Parth Shah wrote: >> >> >> On 12/5/19 7:33 PM, Dietmar Eggemann wrote: >>> On 05/12/2019 11:49, Valentin Schneider wrote: >>>> >>>> On 05/12/2019 09:24, Dietmar Eggemann wrote: >>>>> On 25/11/2019 10:46, Parth Shah wrote: > > [...] > >>> OK, I went through this thread again. So Google or we have to provide >>> the missing per-taskgroup API via cpu controller's attributes (like for >>> uclamp) for the EAS usecase. >> >> I suppose many others (including myself) will also be interested in having >> per-taskgroup attribute via CPU controller. > > Ok, let us have a look since Android needs it. > > [...] > >> I kept choosing appropriate name and possible values for this new attribute >> in the separate thread. https://lkml.org/lkml/2019/9/30/215 >> From which discussion, looking at Patrick's comment >> https://lkml.org/lkml/2019/9/18/678 I thought of picking latency_tolerance >> as the appropriate name. >> Still will be happy to change as per the community needs. > > Yeah, SCHED_FLAG_LATENCY_TOLERANCE seems to be pretty long. > Hi, I'm thinking of sending v2 for the patch series and for the sake of continuity, I will maintain the name as it is because I'm expecting further response from other developers for the latency_nice. Will re-spin the series with new name if people agrees upon. Best, Parth