Gvisor on Raspbian
20 hours ago
- #gVisor
- #Kernel Configuration
- #Raspberry Pi
- gVisor provides VM-like isolation with container-like efficiency by implementing a Linux kernel in userspace.
- Running gVisor on Raspberry Pi 5 requires a kernel with 48-bit virtual address space (VA_BITS_48).
- Raspbian uses 39-bit VA by default, causing gVisor to fail due to insufficient virtual address space.
- Ubuntu for Raspberry Pi supports 48-bit VA, making it compatible with gVisor out of the box.
- To fix the issue, rebuild the Raspberry Pi kernel with CONFIG_ARM64_VA_BITS_48 enabled.
- Cross-compiling the kernel on an x86 machine is recommended for faster build times.
- Verification involves checking the kernel config and testing gVisor functionality post-reboot.