2 ms·
Can we test this? Can we install an unpatched OS and observe the same performance penalty? In the case of meltdown, it seems unlikely the CPU is maintaining it
by tedunangst 8y ago
Can we test this? Can we install an unpatched OS and observe the same performance penalty?
In the case of meltdown, it seems unlikely the CPU is maintaining its own shadow page table. How would it do that?
- IntelMiner 8y agoYou could compile a Linux kernel with the Spectre defenses disabled. I assume userspace software that includes mitgations could also be patched out in the same way for testing
- tarlinian 8y agoI agree, I remember reading this article and thinking something was odd...how could you implement page table isolation in hardware? The Spectre improvement could plausibly be more similar to software mitigation...