> On Apr 11, 2019, at 7:38 PM, kernel test robot <rong.a.c...@intel.com> wrote:
>
> FYI, we noticed the following commit (built with gcc-7):
>
> commit: 4f4fd7c5798bbdd5a03a60f6269cf1177fbd11ef ("Don't jump to
> compute_result state from check_result state")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
>
> in testcase: mdadm-selftests
> with following parameters:
>
> disk: 1HDD
> test_prefix: 10
>
>
>
> on test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 4G
>
> caused below changes (please refer to attached dmesg/kmsg for entire
> log/backtrace):
>
>
> +-------------------------------------------------+------------+------------+
> | | 81ba6abd2b | 4f4fd7c579 |
> +-------------------------------------------------+------------+------------+
> | boot_successes | 1 | 0 |
> | boot_failures | 3 | 4 |
> | BUG:kernel_reboot-without-warning_in_test_stage | 3 | 4 |
> | mdadm-selftests.10ddf-fail-two-spares.fail | 0 | 4 |
> +-------------------------------------------------+------------+------------+
>
> [ 165.841336 ] Testing on linux-5.1.0-rc3-00023-g4f4fd7c kernel
> [ 165.841339 ]
> [ 167.302289 ] md/raid:md126: not clean -- starting background reconstruction
> [ 167.304321 ] md/raid:md126: device loop13 operational as raid disk 3
> [ 167.306055 ] md/raid:md126: device loop12 operational as raid disk 2
> [ 167.308044 ] md/raid:md126: device loop11 operational as raid disk 1
> [ 167.309522 ] md/raid:md126: device loop10 operational as raid disk 0
> [ 167.320733 ] md/raid:md126: raid level 6 active with 4 out of 4 devices,
> algorithm 10
> [ 167.327158 ] md126: detected capacity change from 0 to 33554432
> [ 167.409736 ] md: resync of RAID array md126
> [ 167.561148 ] md/raid10:md125: not clean -- starting background
> reconstruction
> [ 167.563142 ] md/raid10:md125: active with 4 out of 4 devices
> [ 167.568822 ] md125: detected capacity change from 0 to 33554432
> [ 167.588867 ] md: delaying resync of md125 until md126 has finished (they
> share one or more physical units)
> [ 168.171556 ] md: md126: resync done.
> [ 168.202995 ] md: resync of RAID array md125
> [ 168.438884 ] md: md125: resync done.
> [ 168.998162 ] md/raid10:md125: Disk failure on loop11, disabling device.
> [ 168.998162 ] md/raid10:md125: Operation continuing on 3 devices.
> [ 169.044560 ] md/raid:md126: Disk failure on loop11, disabling device.
> [ 169.044560 ] md/raid:md126: Operation continuing on 3 devices.
> [ 169.104982 ] md: recovery of RAID array md125
> [ 169.129051 ] md: delaying recovery of md126 until md125 has finished (they
> share one or more physical units)
> [ 170.016071 ] md/raid10:md125: Disk failure on loop12, disabling device.
> [ 170.016071 ] md/raid10:md125: Operation continuing on 2 devices.
> [ 170.031796 ] md/raid:md126: Disk failure on loop12, disabling device.
> [ 170.031796 ] md/raid:md126: Operation continuing on 2 devices.
> [ 170.123425 ] md: md125: recovery interrupted.
> [ 170.127705 ] md: recovery of RAID array md126
> [ 170.132003 ] md: delaying recovery of md125 until md126 has finished (they
> share one or more physical units)
> [ 177.280292 ] md: md126: recovery done.
> [ 177.286369 ] md: recovery of RAID array md125
> [ 177.304563 ] md: delaying recovery of md126 until md125 has finished (they
> share one or more physical units)
> [ 183.347549 ] md: md125: recovery done.
> [ 183.350452 ] md: recovery of RAID array md126
> [ 183.368340 ] md: delaying recovery of md125 until md126 has finished (they
> share one or more physical units)
> [ 190.512654 ] md: md126: recovery done.
> [ 190.519633 ] md: recovery of RAID array md125
> [ 197.641803 ] md: md125: recovery done.
> [ 198.039343 ] tests/10ddf-fail-two-spares... FAILED - see /var/tmp/log for
> details
>
>
> To reproduce:
>
> # build kernel
> cd linux
> cp config-5.1.0-rc3-00023-g4f4fd7c .config
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 olddefconfig
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 prepare
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 modules_prepare
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 SHELL=/bin/bash
> make HOSTCC=gcc-7 CC=gcc-7 ARCH=x86_64 bzImage
>
>
> git clone https://github.com/intel/lkp-tests.git
> cd lkp-tests
> find lib/ | cpio -o -H newc --quiet | gzip > modules.cgz
> bin/lkp qemu -k <bzImage> -m modules.cgz job-script # job-script is
> attached in this email
>
>
>
>
> Thanks,
> Rong Chen
>
> <config-5.1.0-rc3-00023-g4f4fd7c><job-script.txt><dmesg.xz><mdadm-selftests.txt>
Thanks for the report. We are discussing this patch. We may
revert it.
Song
