Received: by 2002:ac0:a5a7:0:0:0:0:0 with SMTP id m36-v6csp1485467imm; Wed, 1 Aug 2018 17:21:58 -0700 (PDT) X-Google-Smtp-Source: AAOMgpcqPafmz2YOmwiXglqSId+QIAUUMHs9QW5/WY5inh99jIYal9yn6N4Dq+IIAKihuAxfsds9 X-Received: by 2002:a62:ac12:: with SMTP id v18-v6mr536818pfe.126.1533169318723; Wed, 01 Aug 2018 17:21:58 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1533169318; cv=none; d=google.com; s=arc-20160816; b=k4Gy6fi1iZlgiMYtrRx/HgPf9RBaKWzglWfwXh4Q6Pe4Vam2iW8/oEF5diHJHbkHZm iUEOrxeKb6Zlhe6kV8ppvz7UZDOOLNgfYbIR/Gwk/TSY5tlNSWflLB/7J482wV7SG7Zv 4EvkNDFQj64KGz6usp9QxG+w3sKGM7OpNe1LTUPNsP0Wp6gVJ8CLTDhCX2U0VOqoQ0hy oATcuuNe1ys9wNQAYy8qCsISftHiXlEOq3ePBFBDdx0GeK/CQF8XH9XN9khEZ/9fGRjn 9CSyRCZccD1LQMJvbWPdT0dStj7PF2WpfVNyqptSaHIcEq7uxvAhEJZVHd7gcJigKlf/ W1sA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject:dkim-signature :arc-authentication-results; bh=sWxJ9J/kaBTEDjOI+Mik5ZXgmE9tvuYyIfBHE3AemwM=; b=aDD8Pgom5+ZUWkGdqNHrY/c1hkfqHyoU9f7eujxD/QuKXyML+jJz1tFyJQd8lGz/Vr pUpPh7Hyd0zAanuBklBPD6uIzntZe0VmNK5+wNTMzGd8xv1YqEouch4Q1focIdhMvc6l SEH19S1xsVPuYPuXrcIESPnxnRywYem4CsYlnRhMdXLd8cw7uopGP98DpaHuMb2aQrZP rYZNUV1O4d9+UbgU2RTaFLXE+nSBbM4CN0pCLesAQC/pbvVhd9NXZ0UlJvqjcI6KAe8d WoiTXBj5YDkvZ1JZ1/qVAvKYNm7iAvTP7VUr8MslItQOq79bgbJWU7KsZqjeGyOSL7GN KDFA== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@gmail.com header.s=20161025 header.b=tT0NIMfi; 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 Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 92-v6si281230plw.81.2018.08.01.17.21.43; Wed, 01 Aug 2018 17:21:58 -0700 (PDT) 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; dkim=fail header.i=@gmail.com header.s=20161025 header.b=tT0NIMfi; 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 S1731682AbeHBCIn (ORCPT + 99 others); Wed, 1 Aug 2018 22:08:43 -0400 Received: from mail-pf1-f193.google.com ([209.85.210.193]:40327 "EHLO mail-pf1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728052AbeHBCIn (ORCPT ); Wed, 1 Aug 2018 22:08:43 -0400 Received: by mail-pf1-f193.google.com with SMTP id e13-v6so233918pff.7; Wed, 01 Aug 2018 17:20:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=sWxJ9J/kaBTEDjOI+Mik5ZXgmE9tvuYyIfBHE3AemwM=; b=tT0NIMfip3XpUkdJoP9oklRh0uWzFh5mB8H2XiQlZ9l4OAj8zWYkRcIUHhseD2EgL9 EuGT1dASktaTWFP+A8cq4YUwoLeLMwiHtbndpCiSmp07aL3T2jZ2f8WNY3jidUanQhnm qLxikwptEcO8D03MHQZAJOx5KALrMU0Y3fTA98Uem3Q1SRWw8sebm3uiyoAHyDHWg34m rF7x27/oMyKi5Ymj9KixfzMy6WWj7o+01+BWzegCxE7gL3VzpLeByAcquZrYBImnWjyp 39RYwgs5NW8YvXTyxQuV5DE7jFPVT+G+ffRf7vyEUfKd88dJ01DHz8bGNhXpmQP+tHvP No3A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:subject:to:cc:references:from:message-id :date:user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=sWxJ9J/kaBTEDjOI+Mik5ZXgmE9tvuYyIfBHE3AemwM=; b=jwxt2hUx+8gMADPBbqfU/dYkMG1fsh4a8ySm6uZXeKpYu2PNK1DfBLaaemw+Z4OGPo eOphMIIz7CplXvUzTp+94oAEAt9QHX3pVTsReD0iT0CScamuXj55kpT2HALNQS056366 7cYoy2UFKKwgiPUrdtHNgrAoY+uFOd/nmmqC3+/a2qeRjbYUsrqo6i8dIB1PWJzTHXMz Bcz0nOaaxA88QWJPau6r1SahHxC6qOyitg5tSkpwIBytid0W1xcA80/wOTzK2sfq0T5V 8OuSgQDI+zE9cOqZf2D1NDnp6MngGldU51uppNziv1s5s3vhKhzybt4zowlSjgbj6f1y v/rQ== X-Gm-Message-State: AOUpUlHFu6c8SOW0fRDCYZJtpKD1rElBGiNCWk2QIZCTYAkfLAevusR6 9DXRjLj0fCjsJf2QoTQAZl0CsJAq X-Received: by 2002:a63:ee56:: with SMTP id n22-v6mr462204pgk.402.1533169220127; Wed, 01 Aug 2018 17:20:20 -0700 (PDT) Received: from server.roeck-us.net (108-223-40-66.lightspeed.sntcca.sbcglobal.net. [108.223.40.66]) by smtp.gmail.com with ESMTPSA id c12-v6sm357227pfl.20.2018.08.01.17.20.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Aug 2018 17:20:19 -0700 (PDT) Subject: Re: linux-next: Tree for Aug 1 To: James Bottomley , Ming Lei Cc: Stephen Rothwell , Linux-Next Mailing List , Linux Kernel Mailing List , linux-scsi References: <20180801175852.36549130@canb.auug.org.au> <20180801224813.GA13074@roeck-us.net> <1533163965.3158.1.camel@HansenPartnership.com> <20180801234727.GA3762@roeck-us.net> <1533168205.3158.12.camel@HansenPartnership.com> From: Guenter Roeck Message-ID: Date: Wed, 1 Aug 2018 17:20:18 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: <1533168205.3158.12.camel@HansenPartnership.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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/01/2018 05:03 PM, James Bottomley wrote: > On Thu, 2018-08-02 at 07:57 +0800, Ming Lei wrote: >> On Thu, Aug 2, 2018 at 7:47 AM, Guenter Roeck >> wrote: >>> On Wed, Aug 01, 2018 at 03:52:45PM -0700, James Bottomley wrote: >>>> On Wed, 2018-08-01 at 15:48 -0700, Guenter Roeck wrote: >>>>> On Wed, Aug 01, 2018 at 05:58:52PM +1000, Stephen Rothwell >>>>> wrote: >>>>>> Hi all, >>>>>> >>>>>> Changes since 20180731: >>>>>> >>>>>> The pci tree gained a conflict against the pci-current tree. >>>>>> >>>>>> The net-next tree gained a conflict against the bpf tree. >>>>>> >>>>>> The block tree lost its build failure. >>>>>> >>>>>> The staging tree still had its build failure due to an >>>>>> interaction >>>>>> with >>>>>> the vfs tree for which I disabled CONFIG_EROFS_FS. >>>>>> >>>>>> The kspp tree lost its build failure. >>>>>> >>>>>> Non-merge commits (relative to Linus' tree): 10070 >>>>>>  9137 files changed, 417605 insertions(+), 179996 deletions(- >>>>>> ) >>>>>> >>>>>> ----------------------------------------------------------- >>>>>> ------ >>>>>> ----------- >>>>>> >>>>> >>>>> The widespread kernel hang issues are still seen. I managed >>>>> to bisect it after working around the transient build failures. >>>>> Bisect log is attached below. Unfortunately, it doesn't help >>>>> much. >>>>> The culprit is reported as: >>>>> >>>>> 2d542828c5e9 Merge remote-tracking branch 'scsi/for-next' >>>>> >>>>> The preceding merge, >>>>> >>>>> 453f1d821165 Merge remote-tracking branch 'cgroup/for-next' >>>>> >>>>> checks out fine, as does the tip of scsi-next (commit >>>>> 103c7b7e0184, >>>>> "Merge branch 'misc' into for-next"). No idea how to proceed. >>>> >>>> This sounds like you may have a problem with this patch: >>>> >>>>     commit d5038a13eca72fb216c07eb717169092e92284f1 >>>>      Author: Johannes Thumshirn >>>>      Date:   Wed Jul 4 10:53:56 2018 +0200 >>>> >>>>          scsi: core: switch to scsi-mq by default >>>> >>>> To verify, boot with the additional kernel parameter >>>> >>>> scsi_mod.use_blk_mq=0 >>>> >>>> Which will reverse the effect of the above patch. >>>> >>> >>> Yes, that fixes the problem. >> >> That may not the root cause, given this issue is only started to >> see from next-20180731, but d5038a13eca7 (scsi: core: switch to >> scsi-mq by default) >> has been in -next for quite a while. >> >> Seems something new causes this issue. > > Read my other email about how to find this. > > https://marc.info/?l=linux-scsi&m=153316446223676 > > Now that we've confirmed the issue, Gunter, could you attempt to bisect > it as that email describes? > Already working on it. Guenter