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Wed, 02 Oct 2019 17:11:42 +0100 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) by AcuMS.aculab.com (fd9f:af1c:a25b:0:43c:695e:880f:8750) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Wed, 2 Oct 2019 17:11:41 +0100 Received: from AcuMS.Aculab.com ([fe80::43c:695e:880f:8750]) by AcuMS.aculab.com ([fe80::43c:695e:880f:8750%12]) with mapi id 15.00.1347.000; Wed, 2 Oct 2019 17:11:41 +0100 From: David Laight To: 'Parth Shah' , "linux-kernel@vger.kernel.org" , "patrick.bellasi@matbug.net" , "tim.c.chen@linux.intel.com" , "valentin.schneider@arm.com" , "qais.yousef@arm.com" , "linux-pm@vger.kernel.org" CC: "peterz@infradead.org" , "vincent.guittot@linaro.org" , "pavel@ucw.cz" , "mingo@redhat.com" , "morten.rasmussen@arm.com" , "pjt@google.com" , "dietmar.eggemann@arm.com" , "tj@kernel.org" , "rafael.j.wysocki@intel.com" , "daniel.lezcano@linaro.org" , "dhaval.giani@oracle.com" , "quentin.perret@arm.com" , subhra mazumdar , "ggherdovich@suse.cz" , "viresh.kumar@linaro.org" , Doug Smythies Subject: RE: [Discussion v2] Usecases for the per-task latency-nice attribute Thread-Topic: [Discussion v2] Usecases for the per-task latency-nice attribute Thread-Index: AQHVd3v+R9Ga+faFYEWoOAwvBU0nZadHhPPg Date: Wed, 2 Oct 2019 16:11:41 +0000 Message-ID: <9645e7c625a84bfabac001fd6ef35559@AcuMS.aculab.com> References: <2bd46086-43ff-f130-8720-8eec694eb55b@linux.ibm.com> In-Reply-To: <2bd46086-43ff-f130-8720-8eec694eb55b@linux.ibm.com> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 X-MC-Unique: fpDrXPGCNbW9bKaxnI-L7w-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogUGFydGggU2hhaA0KPiBTZW50OiAzMCBTZXB0ZW1iZXIgMjAxOSAxMTo0NA0KLi4uDQo+ IDU+IFNlcGFyYXRpbmcgQVZYNTEyIHRhc2tzIGFuZCBsYXRlbmN5IHNlbnNpdGl2ZSB0YXNrcyBv biBzZXBhcmF0ZSBjb3Jlcw0KPiAoIC1UaW0gQ2hlbiApDQo+ID09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQ0K PiBBbm90aGVyIHVzZWNhc2Ugd2UgYXJlIGNvbnNpZGVyaW5nIGlzIHRvIHNlZ3JlZ2F0ZSB0aG9z ZSB3b3JrbG9hZCB0aGF0IHdpbGwNCj4gcHVsbCBkb3duIGNvcmUgY3B1IGZyZXF1ZW5jeSAoZS5n LiBBVlg1MTIpIGZyb20gd29ya2xvYWQgdGhhdCBhcmUgbGF0ZW5jeQ0KPiBzZW5zaXRpdmUuIFRo ZXJlIGFyZSBjZXJ0YWluIHRhc2tzIHRoYXQgbmVlZCB0byBwcm92aWRlIGEgZmFzdCByZXNwb25z ZQ0KPiB0aW1lIChsYXRlbmN5IHNlbnNpdGl2ZSkgYW5kIHRoZXkgYXJlIGJlc3Qgc2NoZWR1bGVk IG9uIGNwdSB0aGF0IGhhcyBhDQo+IGxpZ2h0ZXIgbG9hZCBhbmQgbm90IGhhdmUgb3RoZXIgdGFz a3MgcnVubmluZyBvbiB0aGUgc2libGluZyBjcHUgdGhhdCBjb3VsZA0KPiBwdWxsIGRvd24gdGhl IGNwdSBjb3JlIGZyZXF1ZW5jeS4NCj4gDQo+IFNvbWUgdXNlcnMgYXJlIHJ1bm5pbmcgbWFjaGlu ZSBsZWFybmluZyBiYXRjaCB0YXNrcyB3aXRoIEFWWDUxMiwgYW5kIGhhdmUNCj4gb2JzZXJ2ZWQg dGhhdCB0aGVzZSB0YXNrcyBhZmZlY3QgdGhlIHRhc2tzIG5lZWRpbmcgYSBmYXN0IHJlc3BvbnNl LiAgVGhleQ0KPiBoYXZlIHRvIHJlbHkgb24gbWFudWFsIENQVSBhZmZpbml0eSB0byBzZXBhcmF0 ZSB0aGVzZSB0YXNrcy4gIFdpdGgNCj4gYXBwcm9wcmlhdGUgbGF0ZW5jeSBoaW50IG9uIHRhc2ss IHRoZSBzY2hlZHVsZXIgY2FuIGJlIHRhdWdodCB0byBzZXBhcmF0ZSB0aGVtLg0KDQpIYXMgdGhp cyBiZWVuIGRpYWdub3NlZCBwcm9wZXJseT8NCkkgY2FuJ3QgcmVhbGx5IHNlZSBob3cgdGhlIGZy ZXF1ZW5jeSBkcm9wIGZyb20gQVZYNTEyIHNpZ25pZmljYW50bHkgYWZmZWN0cyBsYXRlbmN5Lg0K TW9zdCB0YXNrcyB0aGF0IHJlcXVpcmUgbG93IGxhdGVuY3kgcHJvYmFibHkgZG9uJ3QgZG8gYSBs b3Qgb2Ygd29yay4NCkl0IGlzIG11Y2ggbW9yZSBsaWtlbHkgdGhhdCB0aGUgbGF0ZW5jeSBpc3N1 ZXMgaGFwcGVuIGJlY2F1c2UgdGhlIEFWWDUxMiB0YXNrcw0KYXJlIGRvaW5nIHZlcnkgZmV3IHN5 c3RlbSBjYWxscyBzbyBjYW4ndCBiZSBwcmUtZW1wdGVkIGV2ZW4gYnkgYSBoaWdoIHByaW9yaXR5 IHRhc2suDQpUaGlzICdmZWF0dXJlJyBpcyBoaW50ZWQgYnkgdGhpczoNCj4gMj4gVHVyYm9TY2hl ZA0KPiAoIC1QYXJ0aCBTaGFoICkNCj4gPT09PT09PT09PT09PT09PT09PT0NCj4gVHVyYm9TY2hl ZCBbMl0gdHJpZXMgdG8gbWluaW1pemUgdGhlIG51bWJlciBvZiBhY3RpdmUgY29yZXMgaW4gYSBz b2NrZXQgYnkNCj4gcGFja2luZyBhbiB1bi1pbXBvcnRhbnQgYW5kIGxvdy11dGlsaXphdGlvbiAo bmFtZWQgaml0dGVyKSB0YXNrIG9uIGFuDQo+IGFscmVhZHkgYWN0aXZlIGNvcmUgYW5kIHRodXMg cmVmcmFpbnMgZnJvbSB3YWtpbmcgdXAgb2YgYSBuZXcgY29yZSBpZg0KPiBwb3NzaWJsZS4NCg0K Q29uc2lkZXIgdGhpcyBleGFtcGxlIG9mIGEgcHJvY2VzcyB0aGF0IHJlcXVpcmVzIGxvdyBsYXRl bmN5IChzdWIgMW1zIHdvdWxkIGJlIGdvb2QpOg0KLSBBIGhhcmR3YXJlIGludGVycnVwdCAob3Ig dGltZXIgaW50ZXJydXB0KSB3YWtlcyB1cCBvbiB0aHJlYWQuDQotIFdoZW4gdGhhdCB0aHJlYWQg d2FrZXMgaXQgd2FrZXMgdXAgb3RoZXIgdGhyZWFkcyB0aGF0IGFyZSBzbGVlcGluZy4NCi0gQWxs IHRoZSB0aHJlYWRzICdiZWF2ZXIgYXdheScgZm9yIGEgZmV3IG1zIChwcm9jZXNzaW5nIFJUUCBh bmQgb3RoZXIgYXVkaW8pLg0KLSBUaGV5IGFsbCBzbGVlcCBmb3IgdGhlIHJlc3Qgb2YgYSAxMG1z IHBlcmlvZC4NCg0KVGhlIGFmZmluaXRpZXMgYXJlIHNldCBzbyBlYWNoIHRocmVhZCBydW5zIG9u IGEgc2VwYXJhdGUgY3B1LCBhbmQgYWxsIGFyZSBTQ0hFRF9SUi4NCk5vdyBsb29wIGFsbCB0aGUg Y3B1cyBpbiB1c2Vyc3BhY2UgKHJ1bjogd2hpbGUgOjsgZG8gOjsgZG9uZSkgYW5kIHNlZSB3aGF0 IGhhcHBlbnMgdG8gdGhlIGxhdGVuY2llcy4NCllvdSByZWFsbHkgd2FudCB0aGUgU0NIRURfUlIg dGhyZWFkcyB0byBpbW1lZGlhdGVseSBwcmUtZW1wdCB0aGUgcnVubmluZyBwcm9jZXNzZXMuDQpC dXQgSSBzdXNwZWN0IG5vdGhpbmcgaGFwcGVucyB1bnRpbCBhIHRpbWVyIGludGVycnVwdCB0byB0 aGUgdGFyZ2V0IGNwdS4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lk ZSwgQnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0K UmVnaXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==