Re: [RFC 3/3] man-pages: Add man page for vmpressure_fd(2)

On 11/07/2012 06:01 AM, Anton Vorontsov wrote:

Configuration
    vmpressure_fd(2) accepts vmpressure_config structure to configure
    the notifications:

    struct vmpressure_config {
         __u32 size;
         __u32 threshold;
    };

    size is a part of ABI  versioning  and  must  be  initialized  to
    sizeof(struct vmpressure_config).

If you want to use a versioned ABI, why not pass in an actual version number?