> In order to avoid the CPU usage problem with poll(), either
> trivial-rewrite should run as multiple daemon processes with fewer
> connections per process, or Postfix should use a more advanced
> technique such as FreeBSD's /dev/poll, where one sets things up

I think you might be referring to FreeBSD's kqueue/kevent model. Paper
to be presented during Freenix/Usenix 2001

This might also be in NetBSD and OpenBSD (though I am not sure)

/dev/poll is from Solaris though I recall some Linux patches which
provided similar scalability. Niel Provos had a paper in the Freenix
track of Usenix 2000 though I can only find this URL at the moment

http://www.citi.umich.edu/techreports/reports/citi-tr-00-4.pdf

Jef Poskanzer of thttpd fame has written a select/poll/kqueue wrapper
which he uses within thttpd

http://www.acme.com/software/thttpd

Regards, Yusuf

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