From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751322AbeDYFiD (ORCPT ); Wed, 25 Apr 2018 01:38:03 -0400 Received: from mx3.molgen.mpg.de ([141.14.17.11]:49299 "EHLO mx1.molgen.mpg.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750888AbeDYFh6 (ORCPT ); Wed, 25 Apr 2018 01:37:58 -0400 Subject: Re: Regression 4.17-rc1: SSD doesn properly resume causing system hang (NULL pointer dereference) To: Bart Van Assche Cc: jejb@linux.vnet.ibm.com, regressions@leemhuis.info, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, martin.petersen@oracle.com, axboe@kernel.dk, linux-scsi@vger.kernel.org References: <59ca6556-11a6-4f77-76e7-d51c7175eb32@molgen.mpg.de> <67ffdf0050a04bf3615c3d8a3a90b0c9c2aeb1ad.camel@wdc.com> <2cc5f0fb-4caa-9c28-7daa-68993d5cb41a@molgen.mpg.de> <14ff1ed06e36a372680872c227b5abe389c753da.camel@wdc.com> <134955874b401e6764077393c75ab2d4549b940a.camel@wdc.com> <6a2162a7-5f48-c107-0b1c-5258089522c5@molgen.mpg.de> <19e19bc6b2fef11faf428fe75447b06e56af9ffd.camel@wdc.com> From: Paul Menzel Message-ID: Date: Wed, 25 Apr 2018 07:37:55 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 MIME-Version: 1.0 In-Reply-To: <19e19bc6b2fef11faf428fe75447b06e56af9ffd.camel@wdc.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Dear Bart, Am 24.04.2018 um 23:17 schrieb Bart Van Assche: > On Tue, 2018-04-24 at 23:04 +0200, Paul Menzel wrote: >> I applied your change, and rebuilt the Linux kernel. Unfortunately, it >> looks like, it didn’t make a difference. > > In that case I don't know what is causing the failure. Can you run a bisect > to determine which commit introduced this regression? With `scsi_mod.use_blk_mq=n` the system resumes fine, so for to me unknown reasons, that Kconfig option get selected in my Linux kernel configuration. I remember having similar issues when this was enabled by default in Linux 4.13-rc?, so it was just a configuration problem and not a regression. Unfortunately, the Linux configuration files are not under version control, so I cannot check, but it is probably my fault. Sorry for the noise, and please tell me, what I can do to get the option working on this old device. Kind regards, Paul