system load gradually increase, until a forced shutdown kernel 5.3.0-23 and above

[odror]

There is no issues with kernel 5.3.0-19. the issue is from kernel 5.3.0-23 and above. 20-22 were not tested.

The freeze is related to nvme drive access.

it can be tested with the following command.

sudo /usr/sbin/grub-probe --device /dev/nvme1n1p2 --target=fs_uuid

This command freezes on kernel with the bug.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-19-generic 5.3.0-19.20
ProcVersionSignature: Ubuntu 5.3.0-19.20-generic 5.3.1
Uname: Linux 5.3.0-19-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Dec 7 17:01:27 2019
HibernationDevice: RESUME=UUID=24dfd8ad-f9e6-4f3a-87bd-32549cf5ba9b
InstallationDate: Installed on 2014-04-18 (2059 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Micro-Star International Co., Ltd. MS-7A95
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-19-generic root=UUID=79eaf8ba-9463-4191-9bfb-30f8b81ed108 ro intel_iommu=on
RelatedPackageVersions:
 linux-restricted-modules-5.3.0-19-generic N/A
 linux-backports-modules-5.3.0-19-generic N/A
 linux-firmware 1.183.2
SourcePackage: linux
UpgradeStatus: Upgraded to eoan on 2019-10-27 (41 days ago)
dmi.bios.date: 07/31/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.90
dmi.board.asset.tag: Default string
dmi.board.name: X299 GAMING PRO CARBON AC (MS-7A95)
dmi.board.vendor: Micro-Star International Co., Ltd
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.90:bd07/31/2018:svnMicro-StarInternationalCo.,Ltd.:pnMS-7A95:pvr1.0:rvnMicro-StarInternationalCo.,Ltd:rnX299GAMINGPROCARBONAC(MS-7A95):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:
dmi.product.family: Default string
dmi.product.name: MS-7A95
dmi.product.sku: Default string
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
modified.conffile..etc.default.apport:
 # set this to 0 to disable apport, or to 1 to enable it
 # you can temporarily override this with
 # sudo service apport start force_start=1
 enabled=0
mtime.conffile..etc.default.apport: 2014-09-06T20:58:41

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Kai-Heng Feng (kaihengfeng)]

Please test 5.3.0-25.27 in proposed.