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?

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