RE: Arm64 crash while online/offline memory sections

[Qian Cai (QUIC)]

> Do we know which patch in particular is problematic?

Okay, the winner is "mm,memory_hotplug: Allocate memmap from the added memory range".

https://lore.kernel.org/linux-mm/20210421102701.25051-5-osalvador@xxxxxxx/

That and the rest of the series are the minimal I have to revert to fix the crash.