David Hildenbrand, a key Linux kernel engineer with Red Hat, has announced his departure from the company after a decade of significant contributions to memory management, virtualization, and VirtIO development. His recent update to kernel.org maintainer information signals his exit, though details about his future plans remain undisclosed. Hildenbrand has been instrumental in advancing memory management, virtualization, and related low-level areas, with over 1,000 mainline Linux kernel patches attributed to him in 2025 alone. His work spans multiple critical Linux kernel subsystems, including HugeTLB, s390 KVM, memory management reclaim, and upstream maintenance of core memory management code, Get User Pages (GUP), kernel samepage merging (KSM), reverse mapping (RMAP), transparent hugepage (THP), memory advice (MADVISE), VirtIO memory driver, and VirtIO balloon driver.