The key is the test TST_SEL_RET on line 682. It compares the RPL of the return CS selector (saved on the stack by the original CALL) against the current CPL. If RPL == CPL, the PLA returns 0x000 (continue) and LD_DESCRIPTOR finishes normally -- same-privilege return. If RPL CPL, the caller is returning to a less-privileged ring, so the PLA redirects to 0x686 (RETF_OUTER_LEV) -- the cross-privilege path that must also restore the caller's stack. If RPL
The trade-off is performance. Every syscall goes through user-space interception, which adds overhead. I/O-heavy workloads feel this the most. For short-lived code execution like scripts and tests, it is usually fine, but for sustained high-throughput I/O, it can matter.
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James also hears from Catherine and Jo, who have lived with ME for many years. They describe their diagnostic journeys and how they manage their symptoms in their daily lives.
That is until recently, when a social media platform’s ill-kept privacy files surfaced on the public internet and an increasingly litigious group of people decided to take matters to court. Now, in an attempt to work proactively to keep underage users safe online and also ensure the privacy of everyone’s collected data, companies are pursuing new methods to verify the age of their users online. But the lack of federal regulation is also fueling this paradoxical directive and fostering the conflict: social media companies can collect the data of users of all ages, to keep children safe.
去年，Social Capital创始人查马斯也在播客中提到，因为Claude用起来太费钱，他已经把不少工作转到Kimi的K2上了，称其性能强，成本也比顶尖闭源模型低得多。