Implement workaround for #1518457 (kswapd 100% cpu)

[Joern Heissler]

Bug #1518457 describes an issue that mostly affects EC2 users.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1518457/comments/108
describes a workaround for it:

touch /etc/udev/rules.d/40-vm-hotadd.rules
reboot

Can this workaround please be added to the official EC2 images? EC2 cannot hot swap CPU or memory from what I know.
Having this workaround built in would mean not having to reboot every newly launched instance.

--

AMI: ami-ddf13fb0
aws av zone: us-east-1d
Instance type: t2.nano
lsb_release -d: Description: Ubuntu 16.04 LTS
uname -a: Linux joerntest 4.4.0-28-generic #47-Ubuntu SMP Fri Jun 24 10:09:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

[Patricia Gaughen (gaughen)]

I would prefer to see the problem solved versus applying a workaround to the official ec2 image that would mask the issue. It looks like test kernels were being produced to address the issue but things stalled out.