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From: Paul Menzel <pmenzel+linux-block@molgen.mpg.de>
To: Bart Van Assche <Bart.VanAssche@wdc.com>
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
Subject: Re: Regression 4.17-rc1: SSD doesn properly resume causing system hang (NULL pointer dereference)
Date: Wed, 25 Apr 2018 07:37:55 +0200	[thread overview]
Message-ID: <d5e8823e-27bd-dabe-174f-b111a48b440a@molgen.mpg.de> (raw)
In-Reply-To: <19e19bc6b2fef11faf428fe75447b06e56af9ffd.camel@wdc.com>

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

  reply	other threads:[~2018-04-25  5:38 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-24 16:14 Regression 4.17-rc1: SSD doesn’t " Paul Menzel
2018-04-24 16:26 ` Regression 4.17-rc1: SSD doesnʼt " Bart Van Assche
2018-04-24 17:10   ` Paul Menzel
2018-04-24 17:31     ` Regression 4.17-rc1: SSD doesn " Bart Van Assche
2018-04-24 17:37       ` Paul Menzel
2018-04-24 18:27         ` Bart Van Assche
2018-04-24 21:04           ` Paul Menzel
2018-04-24 21:17             ` Bart Van Assche
2018-04-25  5:37               ` Paul Menzel [this message]
2018-04-25 12:26                 ` Bart Van Assche
2018-04-25 12:34                   ` Regression 4.17-rc1: SSD doesn’t " Paul Menzel

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