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[2620:137:e000::1:20]) by mx.google.com with ESMTP id b20-20020a056a000a9400b0053e0d9dfee5si15476637pfl.217.2022.11.22.05.25.57; Tue, 22 Nov 2022 05:26:10 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232410AbiKVMpF (ORCPT + 90 others); Tue, 22 Nov 2022 07:45:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229507AbiKVMpC (ORCPT ); Tue, 22 Nov 2022 07:45:02 -0500 Received: from zju.edu.cn (mail.zju.edu.cn [61.164.42.155]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id D011D1C402; Tue, 22 Nov 2022 04:44:57 -0800 (PST) Received: by ajax-webmail-mail-app3 (Coremail) ; Tue, 22 Nov 2022 20:44:54 +0800 (GMT+08:00) X-Originating-IP: [10.14.30.50] Date: Tue, 22 Nov 2022 20:44:54 +0800 (GMT+08:00) X-CM-HeaderCharset: UTF-8 From: "Jinlong Chen" To: "Christoph Hellwig" Cc: axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Re: [RFC PATCH 0/2] elevator: restore old io scheduler on failure in elevator_switch X-Priority: 3 X-Mailer: Coremail Webmail Server Version XT5.0.13 build 20210104(ab8c30b6) Copyright (c) 2002-2022 www.mailtech.cn zju.edu.cn In-Reply-To: <20221122122446.GA5068@lst.de> References: <20221121071305.GB23882@lst.de> <6d74b4a9.5489.1849f42de2d.Coremail.nickyc975@zju.edu.cn> <20221122122446.GA5068@lst.de> Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=UTF-8 MIME-Version: 1.0 Message-ID: <7724857b.55d9.1849f5eb423.Coremail.nickyc975@zju.edu.cn> X-Coremail-Locale: zh_CN X-CM-TRANSID: cC_KCgD3_6tGxHxjlFJeCQ--.57695W X-CM-SenderInfo: qssqjiaqqzq6lmxovvfxof0/1tbiAgECB1ZdtcipPgABsm X-Coremail-Antispam: 1Ur529EdanIXcx71UUUUU7IcSsGvfJ3iIAIbVAYjsxI4VWxJw CS07vEb4IE77IF4wCS07vE1I0E4x80FVAKz4kxMIAIbVAFxVCaYxvI4VCIwcAKzIAtYxBI daVFxhVjvjDU= X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_PASS, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PiBPbiBUdWUsIE5vdiAyMiwgMjAyMiBhdCAwODoxNDozMFBNICswODAwLCBKaW5sb25nIENoZW4g d3JvdGU6Cj4gPiBNb3N0bHkgZmFpbHVyZXMgc3BlY2lmaWMgdG8gdGhlIGludGVuZGVkIGlvIHNj aGVkdWxlciwgbGlrZSBjb25zdW1pbmcgbW9yZQo+ID4gcmVzb3VyY2VzIHRoYW4gdGhlIG9sZCBv bmUgdGhhdCB0aGUgc3lzdGVtIGNhbiBub3QgYWZmb3JkLiBCdXQgc3VyZSBpdCdzCj4gPiByYXJl LCBzbyBkbyB5b3UgdGhpbmsgSSBzaG91bGQganVzdCBjb3JyZWN0IHRoZSBvdXRkYXRlZCBkb2N1 bWVudD8KPiAKPiBJJ2QgYmUgdGVtcHRlZCB0byBqdXN0IGRvY3VtZW50ZWQgdGhlIGJlaGF2aW9y LCBiZWNhdXNlIEkgdGhpbmsgdGhlCj4gY2hhbmNlcyBhcmUgaGlnaCB0aGF0IGlmIHN3aXRjaGlu ZyB0byBvbmUgc2NoZWR1bGUgd2lsbCBmYWlsIHRoYXQKPiBzd2l0Y2hpbmcgYmFjayB0byB0aGUg b2xkIG9uZSB3aWxsIGZhaWwgYXMgd2VsbC4gIEkndmUgZG9uZSBhIHF1aWNrCj4gYXVkaXQgb2Yg YWxsIHRocmVlIHNjaGVkdWxlcnMsIGFuZCB1bmxlc3MgSSBtaXNzZWQgc29tZXRoaW5nIHRoZXJl Cj4gYXJlIG5vIG90aGVyIGZhaWx1cmUgY2FzZXMgZXhjZXB0IGZvciBydW5uaW5nIG91dCBvZiBt ZW1vcnkuCj4gCj4gTWF5YmUgYSBwcmludGsgdG8gZG9jdW1lbnQgdGhhdCBzd2l0Y2hpbmcgdGhl IHNjaGVkdWxlciBmYWlsZWQgYXJlCj4gd2UgYXJlbid0IHVzaW5nIGFueSBzY2hlZHVsZXIgbm93 IG1pZ2h0IGJlIHVzZWZ1bCwgdGhvdWdoLgoKT2ssIHRoZW4gSSdsbCBzZW5kIHR3byBwYXRjaGVz IHdpdGggdGhlIGRvY3VtZW50IHVwZGF0ZWQgYW5kIHRoZSBwcmludGsgYWRkZWQuCgpUaGFua3Mh CkppbmxvbmcgQ2hlbgo=