Date: Wed, 14 Jul 1999 08:31:07 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Jon Ribbens <jon@oaktree.co.uk> Cc: Alfred Perlstein <bright@rush.net>, "Daniel C. Sobral" <dcs@newsguy.com>, freebsd-hackers@freebsd.org, tech-userlevel@netbsd.org, tech@openbsd.org Subject: Re: Replacement for grep(1) (part 2) Message-ID: <Pine.BSF.4.10.9907140829520.58023-100000@salmon.nlsystems.com> In-Reply-To: <19990713100228.C10979@oaktree.co.uk>
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On Tue, 13 Jul 1999, Jon Ribbens wrote:
> Alfred Perlstein <bright@rush.net> wrote:
> > You're browsing with netscape and It hits about 32megs in size,
> > you click on a multimedia object and netscape execs a helper app.
>
> vfork()
>
> > you also have to consider a program wishing to make sparse use
> > of its address space, without overcommit it becomes impossible.
>
> So Don't Do That Then.
Overcommit can be used for many reasons. I use it to reserve a large
linear address space to mmap alpha i/o spaces to which allows an efficient
implementation of inx/outx in user mode:
UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TT TIME COMMAND
0 43655 43652 7 2 0 12616584 12456 select S ?? 1036:41.62 /usr/X11R6/bin/X -auth /usr/X11R6/lib/X11/xdm/authdir/A:0-w43652
The X server is using 12G of address space..
--
Doug Rabson Mail: dfr@nlsystems.com
Nonlinear Systems Ltd. Phone: +44 181 442 9037
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