The impact of page-table isolation on I/O performance
The impact of page-table isolation on I/O performance
[Kernel] Posted Apr 24, 2018 17:47 UTC (Tue) by corbet
Ever since kernel page-table isolation (PTI) was introduced as a mitigation for the Meltdown CPU vulnerability, users have worried about how it affects the performance of their systems. Most of that concern has been directed toward its impact on computing performance, but I/O performance also matters. At the 2018 Linux Storage, Filesystem, and Memory-Management Summit, Ming Lei presented some preliminary work he has done to try to quantify how severely PTI affects block I/O operations.