The kernel's swap subsystem is charged with managing anonymous pages in secondary storage when those pages are (hopefully) not being used and the memory they occupy is needed elsewhere. This long-unloved subsystem has
seen a resurgence of developer interest in recent times, so it is not surprising that it was the topic of three separate sessions in the memory-management track at the
2026 Linux Storage,
Filesystem, Memory Management, and BPF Summit. Two of those sessions
were concerned with improving the performance and maintainability of the
swap code, while one (shared with the storage track) was about how swapping could be friendlier to solid-state storage devices.

https://lwn.net/Articles/1072657/
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