Linux, for the first time, is in the process of merging a security patch that will cause significant slowdown https://lwn.net/SubscriberLink/741878/eb6c9d3913d7cb2b/ … "all existing x86 processors are seemingly affected by information-disclosure vulnerabilities, future processors may not be"
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What about software walks (though tbf that code prob _has_ to be mapped into userspace no matter what)?
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Unclear about actual performance cost of switching to a kernel address space on each syscall. It might not be too bad. Software should maybe not be written assuming syscalls are super fast, I mean performance is good, but vulnerabilites are also real and need to be mitigated
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I like to try out more secure designs in Sortix, even at a performance cost. I don't have as many compatibility constraints and can try out stuff that makes me better than Linux in some regards. Sortix is not secure right now but that doesn't stop me from adding security.
End of conversation
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