I am using Kata containers and create containers inside the virtual machine. The hypervisor used is QEMU. My workload is I/O and network intensive. So, I prefer SR-IOV VF (which provides better network isolation) and DAX caching to work together. However, I was unable to create a QEMU based virual machine when the above mentioned featires are enabled together.
Currently DAX cache need to be set to 0, to boot the VM successfully with the SR-IOV VF to be attached. Enabling both SR-IOV VF and DAX work together will potentially improve performance for workloads which are I/O and network intensive. This patch enables SR-IOV VF and DAX to work together.
