Re: poll(): IN/OUT vs {RD,WR}NORM

[Greg Troxel <gdt%lexort.com@localhost>]

Johnny Billquist <bqt%softjar.se@localhost> writes:

>      POLLPRI        High priority data may be read without blocking.
>
>      POLLRDBAND     Priority data may be read without blocking.
>
>      POLLRDNORM     Normal data may be read without blocking.

Is this related to the "oob data" scheme in TCP (which is a hack that
doesn't work)?   Where do we attach 3 priority levels to data?