This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:
apport-collect 1498206
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1498206
Title:
Fix CPU lockup on Hyper-V/Azure
Status in linux package in Ubuntu:
Incomplete
Bug description:
Description of problem:
Large sized VMs with 32 VCPUs and more than 100G memory sometimes hang at
boot, and the console keeps printing logs like "soft lockup - CPU#14 stuck for
23s!"
This particular issue can be resolved with the following patch upstream:
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/commit/arch/x86/kernel/cpu?id=88c9281a9fba67636ab26c1fd6afbc78a632374f
Repro rate is low. To repro, provision a larger VM (i.e. G5 VM on
Azure) and reboot many times, monitoring the console until the "soft
lockup - CPU" error is seen.
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