Hotplugging and poisoning

Memory hotplugging is one of the least-loved areas of the memory-management subsystem; there are many use cases for it, but nobody has taken ownership of it. A similar situation exists for hardware page poisoning, a somewhat neglected mechanism for dealing with memory errors. At the 2018 Linux Storage, Filesystem, and Memory-Management summit, Michal Hocko and Mike Kravetz dedicated a pair of brief memory-management track sessions to problems that have been encountered in these subsystems, one of which seems more likely to get the attention it needs than the other.

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