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x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfLC+2SXTphHZjvpQwji7RZKj3pIR80Zu3dE5pbCCqF5Yjnn4dXAa8Q5dhzkIJBFUyjuM1srmeizcM636x72DLXBcOjqfGMYbX9/MFXTsr2I3O0bc9elH Mz8y9amNTJmP4cHfO/oJmyyTdnYe1QO6+XvjF5ON0F9OWjiwXqlPgbLOlcO2HF629y4azSTr4yIQiW5LxM25vMsDSEP74gO9EccJ7N6b9lsWs03gAQoubhkJ X-CM-Analysis: v=2.3 cv=WaUilXpX c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=wRwT6uffUbIA:10 a=t_PdEiP4ckcA:10 a=F7qjIGpQ-GgA:10 a=kj9zAlcOel0A:10 a=xqWC_Br6kY4A:10 a=Kd1tUaAdevIA:10 a=Lf-vpJhqX20A:10 a=e7ubv2peixlGJVboVy4A:9 a=CjuIK1q_8ugA:10 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751099AbeDPQpY (ORCPT ); Mon, 16 Apr 2018 12:45:24 -0400 Received: from mail-bn3nam01on0117.outbound.protection.outlook.com ([104.47.33.117]:36294 "EHLO NAM01-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750972AbeDPQpX (ORCPT ); Mon, 16 Apr 2018 12:45:23 -0400 From: Sasha Levin To: Pavel Machek CC: Linus Torvalds , Steven Rostedt , Petr Mladek , "stable@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "linux-mm@kvack.org" , Cong Wang , Dave Hansen , Johannes Weiner , Mel Gorman , Michal Hocko , Vlastimil Babka , Peter Zijlstra , Jan Kara , Mathieu Desnoyers , Tetsuo Handa , Byungchul Park , Tejun Heo Subject: Re: [PATCH AUTOSEL for 4.14 015/161] printk: Add console owner and waiter logic to load balance console writes Thread-Topic: [PATCH AUTOSEL for 4.14 015/161] printk: Add console owner and waiter logic to load balance console writes Thread-Index: AQHTz5h7IvK2v80d0k6VVqDoPwJEM6P4GK8AgAnYKwCAAX5DAIAAHfKAgAADdYCAAAWWgIAABF0AgAACQQCAAAQXAIAAAuyAgAAA5gCAAADDAA== Date: Mon, 16 Apr 2018 16:45:16 +0000 Message-ID: <20180416164514.GG2341@sasha-vm> References: <20180415144248.GP2341@sasha-vm> <20180416093058.6edca0bb@gandalf.local.home> <20180416153031.GA5039@amd> <20180416155031.GX2341@sasha-vm> <20180416160608.GA7071@amd> <20180416161412.GZ2341@sasha-vm> <20180416162850.GA7553@amd> <20180416163917.GE2341@sasha-vm> <20180416164230.GA9807@amd> In-Reply-To: <20180416164230.GA9807@amd> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;DM5PR2101MB0869;7:zcLFLMDvOy96YRuQ0deVPDGvDc/UnVSJiSnqRpB2hmuqXq5bJF4zRX2SmhTmwcXpVRD5LZ8lPr58H48UABPViAS4XvzVFcBi633noSpsuCkL5kDhWRT+4KsXzClw0SLw7d+2Yra49Lub4uqWwybtQZnBuEpE3RKwoxGxG4cX/XWPbx7Y0Xi5g8aT75AIYXXMD04cjd3Mk7JgxFZzt9MgRdn/a06b9k9NpXeAinijztaLvyQMeMZBHyZA0IVBl84+;20:NuKLL979vw0twH8v3y1v9F8U+6NtajZTJTzRvLf2mHCjTS9IudiCzUCt0KIuKWcjNYS0euo+ItxJmwFnjSBDnFBv/Aa0UYXWp7EcYD27ziTJfsnc6gN9krQwEZ4QT9aTyoqrGcOML6fzshaORRqxmvhDofbIr2VqCFnN8dvzPTo= x-ms-exchange-antispam-srfa-diagnostics: SOS; x-ms-office365-filtering-ht: Tenant x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(48565401081)(5600026)(4534165)(4627221)(201703031133081)(201702281549075)(2017052603328)(7193020);SRVR:DM5PR2101MB0869; x-ms-traffictypediagnostic: DM5PR2101MB0869: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:; x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(8211001083)(61425038)(6040522)(2401047)(8121501046)(5005006)(93006095)(93001095)(10201501046)(3231232)(944501347)(52105095)(3002001)(6055026)(61426038)(61427038)(6041310)(20161123562045)(20161123560045)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123564045)(20161123558120)(6072148)(201708071742011);SRVR:DM5PR2101MB0869;BCL:0;PCL:0;RULEID:;SRVR:DM5PR2101MB0869; x-forefront-prvs: 0644578634 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(7916004)(366004)(39380400002)(346002)(396003)(39860400002)(376002)(69234005)(377424004)(189003)(199004)(68736007)(305945005)(2906002)(102836004)(7736002)(3846002)(72206003)(93886005)(3280700002)(6916009)(7416002)(6506007)(105586002)(53936002)(54906003)(14454004)(3660700001)(33716001)(33656002)(6512007)(9686003)(6436002)(486006)(6116002)(10090500001)(6246003)(1076002)(478600001)(316002)(106356001)(81166006)(4326008)(99286004)(2900100001)(10290500003)(59450400001)(8676002)(229853002)(11346002)(81156014)(476003)(76176011)(446003)(22452003)(6486002)(33896004)(86362001)(26005)(39060400002)(8936002)(5660300001)(86612001)(25786009)(5250100002)(186003)(97736004)(66066001)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:DM5PR2101MB0869;H:DM5PR2101MB1032.namprd21.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; x-microsoft-antispam-message-info: jAP7gfQ310pWiLCUp0428PSwDLJ7ZFGYyYcfpOCS+NjjTkQzzREYR7e7+Rg6FAEO0MhhcW9ofrT2aaeFzTK2iHQqQA8DpLBq7Ect+WkXgGxnOhT3DPjfGv1lDIlUv7h66JsgcjQU+R3QQXW0VdoSIalg+seCBpIDwKiDQOxiZNmu5ijnmSYYYDsudOebAA1t spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: c2f89d01-c9a1-4d8a-2b30-08d5a3b96f29 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: c2f89d01-c9a1-4d8a-2b30-08d5a3b96f29 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Apr 2018 16:45:17.0028 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB0869 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 Mon, Apr 16, 2018 at 06:42:30PM +0200, Pavel Machek wrote: >On Mon 2018-04-16 16:39:20, Sasha Levin wrote: >> On Mon, Apr 16, 2018 at 06:28:50PM +0200, Pavel Machek wrote: >> > >> >> >> Is there a reason not to take LED fixes if they fix a bug and don'= t >> >> >> cause a regression? Sure, we can draw some arbitrary line, maybe >> >> >> designate some subsystems that are more "important" than others, b= ut >> >> >> what's the point? >> >> > >> >> >There's a tradeoff. >> >> > >> >> >You want to fix serious bugs in stable, and you really don't want >> >> >regressions in stable. And ... stable not having 1000s of patches >> >> >would be nice, too. >> >> >> >> I don't think we should use a number cap here, but rather look at the >> >> regression rate: how many patches broke something? >> >> >> >> Since the rate we're seeing now with AUTOSEL is similar to what we we= re >> >> seeing before AUTOSEL, what's the problem it's causing? >> > >> >Regression rate should not be the only criteria. >> > >> >More patches mean bigger chance customer's patches will have a >> >conflict with something in -stable, for example. >> >> Out of tree patches can't be a consideration here. There are no >> guarantees for out of tree code, ever. > >Out of tree code is not consideration for mainline, agreed. Stable >should be different. This is a discussion we could have with in right forum, but FYI stable doesn't even guarantee KABI compatibility between minor versions at this point.