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[$] A call to reconsider address-space isolation
Thursday September 29, 2022. 05:44 PM , from LWN.net
When the kernel is running, it has access to its entire address space —
usually including all of physical memory — even if only a small portion of that address space is actually needed. That increases the kernel's vulnerability to speculative attacks. An address-space isolation patch set aiming to change this situation has been circulating for a few years, but has never been seriously considered for merging into the mainline. At the 2022 Linux Plumbers Conference, Ofir Weisse sought to convince the development community to reconsider address-space isolation.
https://lwn.net/Articles/909469/
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