Re: block: Always check queue limits for cloned requests

From	Mike Snitzer <snitzer@redhat.com>
Newsgroups	linux.kernel
Subject	Re: block: Always check queue limits for cloned requests
Date	2015-11-29 18:00 +0100
Message-ID	<qAduq-8V-15@gated-at.bofh.it> (permalink)
References	<qyZtw-1TC-25@gated-at.bofh.it> <qz4CS-5DC-15@gated-at.bofh.it> <qA8O5-5GP-1@gated-at.bofh.it> <qAcoG-7WA-3@gated-at.bofh.it> <qAcRH-8lW-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Sun, Nov 29 2015 at 11:15am -0500,
Markus Trippelsdorf <markus@trippelsdorf.de> wrote:

> On 2015.11.29 at 16:43 +0100, Hannes Reinecke wrote:
> > On 11/29/2015 12:49 PM, Markus Trippelsdorf wrote:
> > > 
> > > I'm still seeing the issue (BUG at drivers/scsi/scsi_lib.c:1096!) even
> > > with this patch applied.
> > > 
> > > markus@x4 linux % git describe
> > > v4.4-rc2-215-g081f3698e606
> > > 
> > Can you generate a crashdump?
> > I would need to cross-check with the other dumps I'm having to figure
> > out if this really is the same issue.
> > There have been other reports (and fixes) which show we're fighting
> > several distinct issues here.
> 
> Unfortunately no. The crash happens on the disk where I store my log
> files. And after it happened the magic SysRq keys don't work anymore.
> 
> The crash only happens on my spinning rust drive that uses the cfq
> scheduler. The SSDs (deadline) are fine.
> 
> The BUG happens reproducibly when building http://www.sagemath.org/ on
> that drive.

Are you using DM multipath?  If unsure, please let us know which
device(s) map to the "spinning rust drive", and provide output from:
lsblk
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Thread

[PATCH] block: Always check queue limits for cloned requests Hannes Reinecke <hare@suse.de> - 2015-11-26 08:50 +0100
  Re: block: Always check queue limits for cloned requests Mike Snitzer <snitzer@redhat.com> - 2015-11-26 14:20 +0100
    Re: block: Always check queue limits for cloned requests Markus Trippelsdorf <markus@trippelsdorf.de> - 2015-11-29 13:00 +0100
      Re: block: Always check queue limits for cloned requests Hannes Reinecke <hare@suse.de> - 2015-11-29 16:50 +0100
        Re: block: Always check queue limits for cloned requests Markus Trippelsdorf <markus@trippelsdorf.de> - 2015-11-29 17:20 +0100
          Re: block: Always check queue limits for cloned requests Mike Snitzer <snitzer@redhat.com> - 2015-11-29 18:00 +0100
            Re: block: Always check queue limits for cloned requests Markus Trippelsdorf <markus@trippelsdorf.de> - 2015-11-29 18:10 +0100
              Re: block: Always check queue limits for cloned requests Ming Lei <tom.leiming@gmail.com> - 2015-11-30 07:20 +0100
                Re: block: Always check queue limits for cloned requests Markus Trippelsdorf <markus@trippelsdorf.de> - 2015-11-30 08:20 +0100
              Re: block: Always check queue limits for cloned requests Hannes Reinecke <hare@suse.de> - 2015-11-30 07:50 +0100

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