From owner-freebsd-hackers Wed Mar 25 16:07:15 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id QAA05676 for freebsd-hackers-outgoing; Wed, 25 Mar 1998 16:07:15 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from d182-89.uoregon.edu (d182-89.uoregon.edu [128.223.182.89]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id QAA05604 for ; Wed, 25 Mar 1998 16:06:53 -0800 (PST) (envelope-from gurney_j@efn.org) Received: (from jmg@localhost) by d182-89.uoregon.edu (8.8.7/8.8.7) id QAA24194; Wed, 25 Mar 1998 16:06:43 -0800 (PST) Message-ID: <19980325160643.04833@hydrogen.nike.efn.org> Date: Wed, 25 Mar 1998 16:06:43 -0800 From: John-Mark Gurney To: Terry Lambert Cc: "David E. Cross" , eivind@yes.no, shimon@simon-shapiro.org, kgor@inetspace.com, roberto@keltia.freenix.fr, freebsd-hackers@FreeBSD.ORG Subject: Re: How do you increase available SYSV shared memory? References: <199803212148.OAA06529@usr09.primenet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.69 In-Reply-To: <199803212148.OAA06529@usr09.primenet.com>; from Terry Lambert on Sat, Mar 21, 1998 at 09:48:27PM +0000 Reply-To: John-Mark Gurney Organization: Cu Networking X-Operating-System: FreeBSD 2.2.1-RELEASE i386 X-PGP-Fingerprint: B7 EC EF F8 AE ED A7 31 96 7A 22 B3 D8 56 36 F4 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Terry Lambert scribbled this message on Mar 21: > That said, I believe there are currently reasons, until you can use > a procfs call to adopt a copy-on-write region as a non-copy-on-write so we need to have a way for procfs to list all the file descriptors that are owned by the process so that you can mmap them MAP_{SHARED,PRIVATE} to their hearts content? > region in another process (ie: copy the pages if they are /dev/zero > pages, but share them otherwise), that SYSV SHMEM is actually a > better (in terms of performance) technology. what's wrong with a unix domain socket and passing the file descriptor through the socket? -- John-Mark Gurney Modem Rev/FAX: +1 541 346 9237 Cu Networking P.O. Box 5693, 97405 Live in Peace, destroy Micro$oft, support free software, run FreeBSD Don't trust anyone you don't have the source for To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message