Retbleed: Call Depth Tracking Mitigation Eyed To Avoid IBRS "Performance Horror Show" - Phoronix

Due to the new 'Retbleed' security mitigation further hurting CPU performance for affected processors, Intel engineers have revisited work on call depth tracking mitigation as an alternative to the Indirect Branch Restricted Speculation (IBRS) mitigation to h…

Thomas Gleixner of Linutronix, which Intel acquired earlier this year, and longtime Intel engineer Peter Zijlstra have been working on "retbleed=stuff" as a new mitigation approach for Retbleed with … [+2176 chars]

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