Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!tut.cis.ohio-state.edu!ucbvax!dog.ee.lbl.gov!elf.ee.lbl.gov!torek
From: torek@elf.ee.lbl.gov (Chris Torek)
Newsgroups: comp.unix.internals
Subject: Re: Help getting pointer to a u structure of a process
Keywords: process, user structure
Message-ID: <10781@dog.ee.lbl.gov>
Date: 9 Mar 91 09:34:45 GMT
References: <1991Mar06.203225.20019@lynx.CS.ORST.EDU> <10712@dog.ee.lbl.gov> <124885@uunet.UU.NET>
Reply-To: torek@elf.ee.lbl.gov (Chris Torek)
Organization: Lawrence Berkeley Laboratory, Berkeley
Lines: 32
X-Local-Date: Sat, 9 Mar 91 01:34:45 PST

>In article <10712@dog.ee.lbl.gov> I wrote:
>>Half of the raison d'etre of the `u. area' is that it can be sloughed off
>>when the process is not running. ...

In article <124885@uunet.UU.NET> rbj@uunet.UU.NET (Root Boy Jim) writes:
>What is the other half? To save space?

Hm, well, make that `9/10ths' :-) .

I am not sure exactly what I was thinking, but half of it could now be
considered `hysterical raisins'.

>I thought it was going to be merged with the proc table in 4.4. Eh?

4.4?  What is 4.4?  :-)

`wc -l' output:

     155 /arch/4.2bsd/usr/src/sys/h/user.h
     147 /arch/4.3bsd/usr/src/sys/h/user.h
     147 /arch/4.3tahoe/usr/src/sys/h/user.h
     128 [previous alpha release (`4.3reno') user.h]
      53 [tonight's user.h]

I would say there is a definite trend here....

Note that the pcb and kernel stack are slated to stay in a `sloughable'
area; whether it is to be called the `u. area', and whether it will
live at a fixed virtual address, is open to question.
-- 
In-Real-Life: Chris Torek, Lawrence Berkeley Lab EE div (+1 415 486 5427)
Berkeley, CA		Domain:	torek@ee.lbl.gov