Dear Michal, the reproducer is pretty easy. Start two VMs from the same clone using qemu/kvm and enable ksm + maximaize scan pages to trigger it fast. That's it. Greets, Stefan Am 19.12.18 um 07:47 schrieb Michal Hocko:

On Tue 18-12-18 19:45:57, Stefan Priebe - Profihost AG wrote:

...

Hello Michael,

since your latest mm patches / mm memory hotplug patches added to the SLE15 tree we get the following crash / corruption stack trace everytime ksm is running.

Could you open a bug with more information (is this reproducible, steps to reproduce etc.) please?

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