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[209.132.180.67]) by mx.google.com with ESMTP id b29si963085pfm.54.2018.02.07.03.04.13; Wed, 07 Feb 2018 03:04:28 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753721AbeBGLDf (ORCPT + 99 others); Wed, 7 Feb 2018 06:03:35 -0500 Received: from mout.gmx.net ([212.227.17.22]:60506 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753476AbeBGLDd (ORCPT ); Wed, 7 Feb 2018 06:03:33 -0500 Received: from homer.simpson.net ([185.191.217.115]) by mail.gmx.com (mrgmx103 [212.227.17.168]) with ESMTPSA (Nemesis) id 0MSdRI-1eK2aJ09Po-00RW1E; Wed, 07 Feb 2018 12:03:19 +0100 Message-ID: <1518001397.29698.6.camel@gmx.de> Subject: Re: [PATCH BUGFIX 1/1] block, bfq: add requeue-request hook From: Mike Galbraith To: Paolo Valente Cc: Oleksandr Natalenko , Jens Axboe , linux-block , Linux Kernel Mailing List , Ulf Hansson , Mark Brown , Linus Walleij , 'Paolo Valente' via bfq-iosched , Alban Browaeys , Ming Lei , Ivan Kozik , SERENA ZIVIANI <169364@studenti.unimore.it>, Serena Ziviani , Holger =?ISO-8859-1?Q?Hoffst=E4tte?= Date: Wed, 07 Feb 2018 12:03:17 +0100 In-Reply-To: <5584030F-8F4E-4C98-84A5-79873A1BF775@linaro.org> References: <20180205190510.5499-1-paolo.valente@linaro.org> <20180205190510.5499-2-paolo.valente@linaro.org> <1517903761.9843.12.camel@gmx.de> <899B68CC-5955-4418-8BFF-DC55A743A61B@linaro.org> <1517918234.25841.31.camel@gmx.de> <77124223e6116350a5184a5199850304@natalenko.name> <1517924768.25841.32.camel@gmx.de> <8842084cc8a26b7f46ae600bda8a7bd0@natalenko.name> <82ffc96aacc3945861cbb708df346338@natalenko.name> <1517995431.25619.5.camel@gmx.de> <1517998516.6606.1.camel@gmx.de> <5584030F-8F4E-4C98-84A5-79873A1BF775@linaro.org> Content-Type: text/plain; charset="ISO-8859-15" X-Mailer: Evolution 3.20.5 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K0:XQzQx+7iEiGwZkuoEo3hnypBuiGqH9RV/ZTdRlUYeyT9YmYXMQ3 ypMawGVRV4pf1G/kvYm88c2Y1T2rZCweuxTZkEQkubrLAQNBbhe8bVKrmM75m/tuNuzi0MC jlYUoal2vCnpR5Gr6XyvsZ6VWOlfN6PXKLnltep3ZMiQJCrka26kxTdOiHkgzAfmR5WhLHe a4T2v70lrHDURcqjMzM0Q== X-UI-Out-Filterresults: notjunk:1;V01:K0:1UjZHybs+0U=:/25OraoP8ccHGlhysE9miJ EfRDcbT162/+CkDGeAuJdwyqRj/E81BXzIBqjts/ShtQW2gg50qdKhbdbSdKUddYp2ztI5Qzz 6RQhZ6ca2Uwp2FETgRiqacsfKoVEGWZS/GpujfRjCoSBjBP/ZbULHp84qzGqAkML47lrBSKLW wYPbEgJi4FY1mQBRhwlsK62y8160HjugZM4HZSA6k03WUri0ETVp97hmO72xmNUHYorL5/gSD cdM2U9O1fZ0RN9MIgB8/kS73ujmV9BySQsA1rGDRRVlMpFUnkw/UFAfZSc16lREGpU3t0ffuQ FEM2ukdxBP4M5YyfZdxviNCAeoj/EEbKxxboXE2qpCAkya2fmh25tYuzyaby5+J7bUBuc2Kby qp0/QSaCVllb0Y3yN8T2ElXOvdoxkM8omLTMxQiMRbSUHmkVhokd1MoBVUmBmAs90oAOs5iOA L6stlVpE6fnXDI+flAdoOfoD6G61mlqA8E9CYvHRBWgvAB0Be8AWV2yByIxb/Epg6h559R4bH zSfoFFxVS0n79PIAM8OE52bkKA9GiKFxohcsGuAm8YI8DJ/gG0Yrs2fTUSKtmpTV+B2vf8Sy1 KoybGxgOGGX8ZVy8xYFgsF+c/UbW9SOsT2r+MiyO/uSL/PbUcCXG3Z8TNqLYc7GBNgY9AWwt+ jmgSg/5UmPdoeOJlDlaapjA1ankmzBLYbVtkF2/tLjZ02Or/EUTyVx/gYSBxfaCwd9TEFQFHn UUj+3I9B4bt33+nKRdhS+QkQbGU173Mpa+/YetGhl1uedO49XjGJADtNG1KjPZ8hbHuCdZcfz op/JXgtD6IJdUIFvHl/tNaPUf1C59T6IZSzudBXQvxZWXK9Ihk= Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2018-02-07 at 11:27 +0100, Paolo Valente wrote: > > 2. Could you please turn that BUG_ON into: > if (!(rq->rq_flags & RQF_ELVPRIV)) > return; > and see what happens? That seems to make it forgets how to make boom. -Mike