I have seen this. Just make sure the servers have enough free memory before
you start.
If the memory is being taken up by hugepages, you may not have enough for the
upgrade.
On Mon, 2019-06-10 at 17:47 +0000, Mark Bullis wrote:
> We attempted to upgrade 4 SUSE linux z/VM 6.4 guests this last weekend and 2
> of them failed with
>
> {FAILED] Failed to start Load Kernel Modules
>
> Many Out of Memory messages
>
> Kernel panic - not syncing: Out of memory and no killable processes
>
> CPU: 1 PID:250 Comm kworker/u128:2 Not tainted 4.4.131-94.29-default #1
>
> Then CP entered; disable wait.....
>
> The upgrade was successful, but got the above after the first boot.
>
> The 2 upgrades that succeeded uses a kernel 4.12.14-95.16-default. Had to
> restore the faild systems from backups.
>
> Opened an S.R. with SUSE, and the engineer told be to upgrade again, but
> before rebooting check grub and make sure it selects the right kernel.
> Has anyone else seen this? The 2 failed guests are both 20GiB oracle
> database servers with hugepages turned on. The 2 that succeeded do not use
> hugepages and are only 6GiB in size.
>
>
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