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To: Andre Oppermann <andre@freebsd.org>
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Cc: Attilio Rao <attilio@FreeBSD.org>, arch@FreeBSD.org,
	Poul-Henning Kamp <phk@phk.freebsd.dk>
Subject: Re: New "timeout" api, to replace callout
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On Sun, 2 Dec 2007, Andre Oppermann wrote:

> o TCP's data structure is exported to userspace and contains the
>   timeout data structures.  This complicates timeout handling as
>   the data structure is not known to userland and we have to do
>   some hacks to prevent exposure.
>
>    -> The timer facility should provide an opaque userland compat
>       header definition.

I think it is important to do this, but I have some hopes that in 8 we'll have 
fixed up the muddle involving exported data structures.  Obviously, that 
hasn't happened yet, and I had hoped to do it for 7...  Perhaps this time one 
of us will succeed :-).

Robert N M Watson
Computer Laboratory
University of Cambridge