From: schily@schily.net (Joerg Schilling)
Subject: [TUHS] Origin year of BSD csh?
Date: Mon, 27 Jun 2016 17:17:40 +0200 [thread overview]
Message-ID: <57714394.vv8pvCYFh+xj37yi%schily@schily.net> (raw)
In-Reply-To: <DC2A30BA-C596-4FB8-991F-6E42F310A75E@ronnatalie.com>
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Ronald Natalie <ron at ronnatalie.com> wrote:
> vfork() is of use on non-paged (and poorly implemented paging) systems. If you implemented the copy-on-write fork() behavior, you???d not need the vfork KLUDGE.
This is what the Linux people believe. As a result, they have a vfork()
implementation that collects all pitfalls from fork() and vfork() ;-)
The basic difference is:
- With a copy-on-write fork, you copy an address space description and
need to set up a set of new MMU PTEs.
- With vfork, you borrow the address space descrition and the MMU PTEs
from the parent.
Jörg
--
EMail:joerg at schily.net (home) Jörg Schilling D-13353 Berlin
joerg.schilling at fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
URL: http://cdrecord.org/private/ http://sourceforge.net/projects/schilytools/files/'
next prev parent reply other threads:[~2016-06-27 15:17 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-26 10:14 Aharon Robbins
2016-06-26 16:30 ` Mary Ann Horton
2016-06-26 18:14 ` Larry McVoy
2016-06-26 18:32 ` Ronald Natalie
2016-06-26 20:43 ` John Cowan
2016-06-27 0:59 ` Larry McVoy
2016-06-27 1:11 ` John Cowan
2016-06-27 11:27 ` Sven Mascheck
2016-06-27 12:47 ` Steve Nickolas
2016-06-27 14:58 ` Joerg Schilling
2016-06-27 15:29 ` Ronald Natalie
2016-06-27 16:22 ` John Cowan
2016-06-27 16:35 ` Steve Nickolas
2016-06-27 20:00 ` Dave Horsfall
2016-06-27 20:33 ` Ronald Natalie
2016-06-27 20:44 ` Clem Cole
2016-06-27 21:02 ` Steve Nickolas
2016-06-27 21:15 ` Ronald Natalie
2016-06-27 21:20 ` John Cowan
2016-06-27 21:28 ` Ronald Natalie
2016-06-27 21:45 ` John Cowan
2016-06-28 6:49 ` Peter Jeremy
2016-06-28 7:51 ` arnold
2016-06-27 21:29 ` Random832
2016-06-28 14:47 ` Tony Finch
2016-06-26 19:41 ` Clem Cole
2016-06-27 10:31 ` Joerg Schilling
2016-06-27 13:01 ` Ronald Natalie
2016-06-27 13:15 ` Steffen Nurpmeso
2016-06-27 15:17 ` Joerg Schilling [this message]
2016-06-27 13:39 ` [TUHS] Bizarre job control, was csh Warren Toomey
2016-06-27 15:00 ` Steve Nickolas
2016-06-27 15:13 ` Joerg Schilling
2016-06-27 15:23 ` Steve Nickolas
2016-06-26 20:58 ` [TUHS] Origin year of BSD csh? Steve Nickolas
2016-06-27 10:03 ` Joerg Schilling
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