Worked on kernel-level enhancements for Xen virtualization, focusing on both the geerlingguy/linux and torvalds/linux repositories. Used C programming and system architecture expertise to remove obsolete Xen 3.x support from the Xenbus driver, reducing maintenance and aligning with current deployment standards. Reworked Xen PV domain detection by consolidating domain-type checks and leveraging X86_FEATURE_XENPV, which improved reliability and reduced runtime overhead in virtualization paths. These changes streamlined DMA buffer operations and contributed to faster boot times and more robust virtualization workflows. The work demonstrated depth in device driver development and kernel programming, addressing evolving requirements in modern deployment environments.