From owner-freebsd-current Sat May 16 15:47:50 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id PAA21184 for freebsd-current-outgoing; Sat, 16 May 1998 15:47:50 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from dyson.iquest.net (dyson.iquest.net [198.70.144.127]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id PAA21179 for ; Sat, 16 May 1998 15:47:47 -0700 (PDT) (envelope-from toor@dyson.iquest.net) Received: (from root@localhost) by dyson.iquest.net (8.8.8/8.8.8) id RAA05770; Sat, 16 May 1998 17:47:25 -0500 (EST) (envelope-from toor) From: "John S. Dyson" Message-Id: <199805162247.RAA05770@dyson.iquest.net> Subject: Re: cvs commit: src/sys/conf param.c src/sys/kern uipc_domain.c uipc_proto.c uipc_socket.c uipc_socket2.c uipc_usrreq.c src/sys/ In-Reply-To: <199805162159.OAA13568@usr02.primenet.com> from Terry Lambert at "May 16, 98 09:59:49 pm" To: tlambert@primenet.com (Terry Lambert) Date: Sat, 16 May 1998 17:47:25 -0500 (EST) Cc: eivind@yes.no, wollman@khavrinen.lcs.mit.edu, current@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL38 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > > To get around that problem, I'd expand the VM space in the top half of > > the kernel ("somewhere suitable") when it looked like we were "close > > to" running out of space (ie, close to the maxsockets case), and > > probably start out with maxsockets somewhat smaller. (There are, of > > course, a lot of opportunities for high-water/low-water mark magic > > around this). > > > > Does it sound doable? > > The protection you would gain is statistical; there would still be > failure races if you did it (consider a low memory condition; just > because you can expand the page mappings doesn't mean that you will > have pages available for them to point to). > > This is why type stable memory is so annoying. 8-). > You haven't made any arguments for or against type stable memory. Limited memory size is annoying, but a fact of life. The code can be made to be dynamic, but the critical region issues become challenging. John To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message