KAISER: hiding the kernel from user space
KAISER: hiding the kernel from user space
Posted Nov 15, 2017 15:39 UTC (Wed) by hansendc (subscriber, #7363)In reply to: KAISER: hiding the kernel from user space by jreiser
Parent article: KAISER: hiding the kernel from user space
Interrupts are already a small number of thousands cycles, even for a quick one. The entry plus IRET costs alone probably eclipse the (new) CR3 manipulation cost. So, while this CR3 manipulation makes things worse, it does not fundamentally change the speed of an interrupt.
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