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Wed, 19 Aug 2020 22:10:24 +0800 From: =?utf-8?B?YmVuYmppYW5nKOiSi+W9qik=?= To: Dietmar Eggemann CC: Jiang Biao , "mingo@redhat.com" , "peterz@infradead.org" , "juri.lelli@redhat.com" , "vincent.guittot@linaro.org" , "rostedt@goodmis.org" , "bsegall@google.com" , "mgorman@suse.de" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] sched/fair: reduce preemption with IDLE tasks runable(Internet mail) Thread-Topic: [PATCH] sched/fair: reduce preemption with IDLE tasks runable(Internet mail) Thread-Index: AQHWZ6wckGsZD+WUv0OJdOJkfcOxRKklh1uAgAA1DACABNlRgIAAJ90AgAYgFwCAAL04gIAA/wuAgAC/bYCAAQDpAIAB6mEAgAVOvgCAADR0AIADDqgAgAA5AIA= Date: Wed, 19 Aug 2020 14:10:24 +0000 Message-ID: References: <20200801023248.90104-1-benbjiang@gmail.com> <5ed0fd46-3a3d-3c1a-5d75-03a74864e640@arm.com> <592F24A7-BF43-457D-AC40-DC5E35279730@tencent.com> <8bef1f94-f9bf-08a5-2ff3-3485d7796a96@arm.com> <8629CB9F-AFC8-43D6-BD14-B60A0B85ADB3@tencent.com> <5f870781-1648-b4ac-6026-557dfc347109@arm.com> <4964e359-afc5-a256-4950-853a9485eeff@arm.com> <70236E62-AA36-48C1-9382-86353649253C@tencent.com> <3a1047fc-a86a-014a-b17a-eae71f669da1@arm.com> <643B0ECE-D758-4D08-8B1B-C70F34DD9943@tencent.com> <55f04582-69d6-aeb4-85be-3e46a3b15beb@arm.com> <755BFAD0-9072-4D73-9CD7-AF4F74A79D21@tencent.com> <729675a2-b083-4211-62c0-f7ed7f483ae2@arm.com> In-Reply-To: <729675a2-b083-4211-62c0-f7ed7f483ae2@arm.com> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [9.19.161.56] Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org DQoNCj4gT24gQXVnIDE5LCAyMDIwLCBhdCA2OjQ2IFBNLCBEaWV0bWFyIEVnZ2VtYW5uIDxkaWV0 bWFyLmVnZ2VtYW5uQGFybS5jb20+IHdyb3RlOg0KPiANCj4gT24gMTcvMDgvMjAyMCAxNDowNSwg YmVuYmppYW5nKOiSi+W9qikgd3JvdGU6DQo+PiANCj4+IA0KPj4+IE9uIEF1ZyAxNywgMjAyMCwg YXQgNDo1NyBQTSwgRGlldG1hciBFZ2dlbWFubiA8ZGlldG1hci5lZ2dlbWFubkBhcm0uY29tPiB3 cm90ZToNCj4+PiANCj4+PiBPbiAxNC8wOC8yMDIwIDAxOjU1LCBiZW5iamlhbmco6JKL5b2qKSB3 cm90ZToNCj4+Pj4gSGksDQo+Pj4+IA0KPj4+Pj4gT24gQXVnIDEzLCAyMDIwLCBhdCAyOjM5IEFN LCBEaWV0bWFyIEVnZ2VtYW5uIDxkaWV0bWFyLmVnZ2VtYW5uQGFybS5jb20+IHdyb3RlOg0KPj4+ Pj4gDQo+Pj4+PiBPbiAxMi8wOC8yMDIwIDA1OjE5LCBiZW5iamlhbmco6JKL5b2qKSB3cm90ZToN Cj4+Pj4+PiBIaSwNCj4+Pj4+PiANCj4+Pj4+Pj4gT24gQXVnIDExLCAyMDIwLCBhdCAxMTo1NCBQ TSwgRGlldG1hciBFZ2dlbWFubiA8ZGlldG1hci5lZ2dlbWFubkBhcm0uY29tPiB3cm90ZToNCj4+ Pj4+Pj4gDQo+Pj4+Pj4+IE9uIDExLzA4LzIwMjAgMDI6NDEsIGJlbmJqaWFuZyjokovlvaopIHdy b3RlOg0KPj4+Pj4+Pj4gSGksDQo+Pj4+Pj4+PiANCj4+Pj4+Pj4+PiBPbiBBdWcgMTAsIDIwMjAs IGF0IDk6MjQgUE0sIERpZXRtYXIgRWdnZW1hbm4gPGRpZXRtYXIuZWdnZW1hbm5AYXJtLmNvbT4g d3JvdGU6DQo+Pj4+Pj4+Pj4gDQo+Pj4+Pj4+Pj4gT24gMDYvMDgvMjAyMCAxNzo1MiwgYmVuYmpp YW5nKOiSi+W9qikgd3JvdGU6DQo+Pj4+Pj4+Pj4+IEhpLCANCj4+Pj4+Pj4+Pj4gDQo+Pj4+Pj4+ Pj4+PiBPbiBBdWcgNiwgMjAyMCwgYXQgOToyOSBQTSwgRGlldG1hciBFZ2dlbWFubiA8ZGlldG1h ci5lZ2dlbWFubkBhcm0uY29tPiB3cm90ZToNCj4+Pj4+Pj4+Pj4+IA0KPj4+Pj4+Pj4+Pj4gT24g MDMvMDgvMjAyMCAxMzoyNiwgYmVuYmppYW5nKOiSi+W9qikgd3JvdGU6DQo+Pj4+Pj4+Pj4+Pj4g DQo+Pj4+Pj4+Pj4+Pj4gDQo+Pj4+Pj4+Pj4+Pj4+IE9uIEF1ZyAzLCAyMDIwLCBhdCA0OjE2IFBN LCBEaWV0bWFyIEVnZ2VtYW5uIDxkaWV0bWFyLmVnZ2VtYW5uQGFybS5jb20+IHdyb3RlOg0KPj4+ Pj4+Pj4+Pj4+PiANCj4+Pj4+Pj4+Pj4+Pj4gT24gMDEvMDgvMjAyMCAwNDozMiwgSmlhbmcgQmlh byB3cm90ZToNCj4+Pj4+Pj4+Pj4+Pj4+IEZyb206IEppYW5nIEJpYW8gPGJlbmJqaWFuZ0B0ZW5j ZW50LmNvbT4NCj4gDQo+IFsuLi5dDQo+IA0KPj4+IEFyZSB5b3Ugc3VyZSBhYm91dCB0aGlzPw0K Pj4gWWVzLiA6KQ0KPj4+IA0KPj4+IFRoZSBtYXRoIGlzIHRlbGxpbmcgbWUgZm9yIHRoZToNCj4+ PiANCj4+PiBpZGxlIHRhc2s6ICAgICAgKDMgLyAoMTAyNCArIDEwMjQgKyAzKSleKC0xKSAqIDRt cyA9IDI3MzVtcw0KPj4+IA0KPj4+IG5vcm1hbCB0YXNrOiAoMTAyNCAvICgxMDI0ICsgMTAyNCAr IDMpKV4oLTEpICogNG1zID0gICAgOG1zDQo+Pj4gDQo+Pj4gKDRtcyAtIDI1MCBIeikNCj4+IE15 IHRpY2sgaXMgMW1zIC0gMTAwMEhaLCB3aGljaCBzZWVtcyByZWFzb25hYmxlIGZvciA2MDBtcz8g OikNCj4gDQo+IE9LLCBJIHNlZS4NCj4gDQo+IEJ1dCBoZXJlIHRoZSBkaWZmZXJlbnQgc2NoZWQg c2xpY2VzIChjaGVja19wcmVlbXB0X3RpY2soKS0+DQo+IHNjaGVkX3NsaWNlKCkpIGJldHdlZW4g bm9ybWFsIHRhc2tzIGFuZCB0aGUgaWRsZSB0YXNrIHBsYXkgYSByb2xlIHRvLg0KPiANCj4gTm9y bWFsIHRhc2tzIGdldCB+M21zIHdoZXJlYXMgdGhlIGlkbGUgdGFzayBnZXRzIDwwLjAxbXMuDQo+ IA0KPiBTbyB0aGUgaWRsZSB0YXNrIHJ1bnMgZXZlcnkgfjY4MG1zIGJ1dCBvbmx5IGZvciAxIHRp Y2sgKDFtcykgKDQgdGltZXMNCj4gbGVzcyB0aGFuIHRoZSBub3JtYWwgdGFza3MpLiBUaGUgY29u ZGl0aW9uICdpZiAoZGVsdGFfZXhlYyA+DQo+IGlkZWFsX3J1bnRpbWUpJyBpbiBjaGVja19wcmVl bXB0X3RpY2soKSBpcyBvbmx5IHRydWUgYXQgdGhlIDR0aCB0aWNrDQo+IHdoZW4gYSBub3JtYWwg dGFzayBydW5zIGV2ZW4gdGhvdWdoIHRoZSBzbGljZSBpcyAzbXMuDQo+IA0KPiBJbiB0aGUgMjUw IEh6IGV4YW1wbGUgdGhlIHNjaGVkIHNsaWNlIGRpZmZzIGFyZSBoaWRkZW4gYmVoaW5kIHRoZSA0 bXMgdGljay4NCkV4YWN0bHkuIFRpY2sgc2l6ZSBkZWNpZGVzIHRoZSBzaW5nbGUgcnVudGltZSBh bmQgdGhlIGludGVydmFsIGJldHdlZW4NCnR3byBydW5zIG9mIGlkbGUgdGFzay4gDQpUaGF0IG1h a2VzIHNlbnNlIGZvciBtb3N0IG9mIHRoZSB0ZXN0IHJlc3VsdHMgYWJvdmUuDQoNClRoeC4NClJl Z2FyZHMsDQpKaWFuZw0KDQoNCg==