Hi Philip,
The crash was happening on u-12tb1.112xlarge instances (448 cores, 12TB
RAM), and would happen once very few hours on average when the system
was busy.
Our systems worked fine for months after the upgrade to 24.04. Then we
started experiencing (different) crashes with the now retracted
Public bug reported:
We have a repeating (every few hours) kernel OOPS:
BUG: kernel NULL pointer dereference, address: 00a0.
This repeats on several different hardwares so this is not a hardware
issue.
Attached as a file are 5 dmesg logs and kdump reports.
[ 6315.768576] [ T52862]
Another time, on a system idle post reboot:
[21103.156799] [ cut here ]
[21103.156806] kernel BUG at mm/migrate.c:654!
[21103.158475] invalid opcode: [#1] SMP NOPTI
[21103.160470] CPU: 400 PID: 570155 Comm: memclean Tainted: P O
6.5.0-1014-aws #14~22.0
Public bug reported:
After the upgrade to 22.04.4, and kernel linux-signed-aws-6.5, we are
getting the following bug in dmesg:
[176614.768600] kernel BUG at mm/migrate.c:654!
[176614.770487] invalid opcode: [#1] SMP NOPTI
[176614.772485] CPU: 252 PID: 1306651 Comm: memclean Tainted: P
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
Memory leak on large server
Status in linux package in
apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/2023143/+attachment/5678295/+files/WifiSyslog.txt
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apport information
** Attachment added: "acpidump.txt"
https://bugs.launchpad.net/bugs/2023143/+attachment/5678296/+files/acpidump.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/2023143/+attachment/5678294/+files/UdevDb.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/2023143/+attachment/5678293/+files/ProcModules.txt
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** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/2023143/+attachment/5678292/+files/ProcInterrupts.txt
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apport information
** Attachment added: "AudioDevicesInUse.txt"
https://bugs.launchpad.net/bugs/2023143/+attachment/5678289/+files/AudioDevicesInUse.txt
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apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/2023143/+attachment/5678291/+files/ProcCpuinfoMinimal.txt
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** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/2023143/+attachment/5678290/+files/CurrentDmesg.txt
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Public bug reported:
Hi,
We are trying to diagnose a kernel memory look on a production Ubuntu 22.04.2
LTS.
We have tried several official Ubuntu kernels, 5.15aws, 5.19aws and now even
6.2.0-1004-aws (all Ubuntu signed):
```
# cat /proc/version_signature
Ubuntu 6.2.0-1004.4-aws 6.2.6
```
This i
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