[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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T
[Expired for linux (Ubuntu Bionic) because there has been no activity
for 60 days.]
** Changed in: linux (Ubuntu Bionic)
Status: Incomplete => Expired
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** Changed in: linux (Ubuntu)
Status: Triaged => Incomplete
** Changed in: linux (Ubuntu Bionic)
Status: Triaged => Incomplete
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Titl
processor : 0
BogoMIPS: 200.00
Features: fp asimd evtstrm aes pmull sha1 sha2 crc32 cpuid
CPU implementer : 0x43
CPU architecture: 8
CPU variant : 0x1
CPU part: 0x0a1
CPU revision: 1
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** Attachment added: "stress-ng disk test on CRB with
CONFIG_ARM64_SW_TTBR0_PAN disabled."
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1754053/+attachment/5162584/+files/seuss-disk.test
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If CONFIG_ARM64_SW_TTBR0_PAN is disabled in the kernel we dont see these
random crashes anymore. I ran /usr/lib/plainbox-provider-
checkbox/bin/disk_stress_ng and /usr/lib/plainbox-provider-
checkbox/bin/memory_stress_ng tests on CRB (seuss) the last couple of
days and did not see any crash. Howeve
** Changed in: linux (Ubuntu)
Status: Won't Fix => Triaged
** Changed in: linux (Ubuntu Bionic)
Status: Won't Fix => Triaged
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Title:
Collected more data points on this issue.
1. Tried offline CPUs. We found that the crash typically was on CPU:40,
so offlined CPU40 and repeated the test. The test seemed to make
progress but panicked on a different CPU. I tried to offline several
more CPU, but the crash seems to move on to other
-- pre-req for apt-add-repository --
$ sudo apt-get install -y python-software-properties
-- Install cert --
$ sudo apt-add-repository -y ppa:hardware-certification/public
$ sudo apt-get update
$ sudo apt-get install -y canonical-certification-server
Edit this file for iperf3:
/etc/xdg/ca
-- linux-hwe-edge --
Reproduce the issue with linux-hwe-edge running stress-ng sda. Again we see
softlockups causing system to get unstable.
** Attachment added: "trace from 4.15 kernel."
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1754053/+attachment/5103003/+files/cavium-seuss.out2
Based on all the testing with different kernels I suspect this might be
a HW/FW issue, and we might want to seek guidance from Cavium on how to
effectively address this issue on Seuss. Please note that the issue is
not reproduced on a similar CRB system, and occurs *only on* Seuss.
Where there any
-- linux mainline --
The current mainline kernel (4.16 04-01-2018) from
http://kernel.ubuntu.com/~kernel-ppa/mainline/ was installed and tested using
stress-ng sda. Again softlockups causing system to be unstable.
** Attachment added: "trace from 4.16 kernel."
https://bugs.launchpad.net/ubun
-- linux-hwe --
Reproduced with linux-hwe on xenial running stress-ng sda. We either see soft
lockups or we see the kernel oopsing on random fs/jbd2/ code, which I believe
is a side effect of lockups.
** Attachment added: "trace from 4.13 kernel."
https://bugs.launchpad.net/ubuntu/+source/l
These observations were on a system in our lab called "seuss". My
suggestions for next steps would be:
1) Determine how reliable this failure is.
a) Deploy xenial/hwe on seuss, and downgrade the kernel to the version in the
crash log (4.13.0-36-generic #40~16.04.1-Ubuntu).
b) Run the com.canoni
** Description changed:
Seen on a Cavium CRB1S a couple of times while running the
- com.canonical.certification::disk/disk_stress_ng_sda kernel from the
+ com.canonical.certification::disk/disk_stress_ng_sda testcase from the
canonical-certification-server test suite:
[ 1823.116031] Unab
** Changed in: linux (Ubuntu Artful)
Importance: Undecided => High
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => High
** Tags added: kernel-da-key
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