linux-kernel - [scatterlist] 8f39742f03: suspend

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Date:   Fri, 1 Nov 2019 11:33:49 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Sultan Alsawaf <sultan@...neltoast.com>
Cc:     Sultan Alsawaf <sultan@...neltoast.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Thomas Hellstrom <thellstrom@...are.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Ming Lei <ming.lei@...hat.com>,
        Gal Pressman <galpress@...zon.com>,
        linux-kernel@...r.kernel.org, lkp@...ts.01.org
Subject: [scatterlist]  8f39742f03: suspend_stress.fail

FYI, we noticed the following commit (built with gcc-7):

commit: 8f39742f0383b3228de59f3d0e69715b8ec7eb61 ("[PATCH] scatterlist: Speed up for_each_sg() loop macro")
url: https://github.com/0day-ci/linux/commits/Sultan-Alsawaf/scatterlist-Speed-up-for_each_sg-loop-macro/20191029-045656


in testcase: suspend_stress
with following parameters:

	mode: freeze
	iterations: 10



on test machine: 4 threads BroadWell with 8G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):




If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>

test started
(then system reboots upon the first freeze.
with commit 8005803a2ca0af49f36f6e9329b5ecda3df27347, we can
always do 10 iterations of freeze.)


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Oliver Sang


View attachment "config-5.4.0-rc5-00020-g8f39742f0383b" of type "text/plain" (200562 bytes)

View attachment "job-script" of type "text/plain" (4925 bytes)

View attachment "suspend_stress" of type "text/plain" (13 bytes)

View attachment "job.yaml" of type "text/plain" (3788 bytes)