def METHOD_NAME(microvm_factory, guest_kernel_linux_4_14, rootfs_rw):
    """The microvm defined for the boottime SLA
    Guest kernel 4.14
    Rootfs: Ubuntu 22.04 ext4
    Using ext4 seems to result in a faster boot than with squashfs. Probably
    because we have to spend CPU time decompressing and extracting into memory.
    """
    return microvm_factory.build(kernel=guest_kernel_linux_4_14, rootfs=rootfs_rw)