From owner-freebsd-hackers Mon Jul 3 12:40:43 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from jade.chc-chimes.com (jade.chc-chimes.com [216.28.46.6]) by hub.freebsd.org (Postfix) with ESMTP id 2A62F37B551 for ; Mon, 3 Jul 2000 12:40:41 -0700 (PDT) (envelope-from billf@jade.chc-chimes.com) Received: by jade.chc-chimes.com (Postfix, from userid 1001) id 84F831C6C; Mon, 3 Jul 2000 15:40:40 -0400 (EDT) Date: Mon, 3 Jul 2000 15:40:40 -0400 From: Bill Fumerola To: Bosko Milekic Cc: Poul-Henning Kamp , freebsd-hackers@FreeBSD.ORG Subject: Re: mbuf re-write(s), v 0.1 Message-ID: <20000703154040.V18942@jade.chc-chimes.com> References: <7941.962650295@critter.freebsd.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0i In-Reply-To: ; from bmilekic@dsuper.net on Mon, Jul 03, 2000 at 03:20:22PM -0400 X-Operating-System: FreeBSD 3.3-STABLE i386 Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Mon, Jul 03, 2000 at 03:20:22PM -0400, Bosko Milekic wrote: > > Considering the prominence of DoS attacks and similar, I think it > > makes a lot of sense to be able to free the memory again, and if > > the hysteresis you have built in means that there is no measurable > > performance impact I think you will face no objections. > > That was one of the reasons of writing. Oh, and there's something I > forgot to mention previously. The code I presently have frees memory > dedicated to mbufs, so obviously, it's significant, but it's even > more significant in the case of mbuf clusters, as they are larger. I > still haven't finished writing the cluster stuff though but expect it > to be similar in concept and design. Just to add a little real worldness here: I'd love to have FreeBSD be able to reclaim memory quicker at the sacrifice of a few cpu cycles. Why? Well, the "add more memory" arguement doesn't work well when I get DoS attacks that will eat any memory available because they can connect quicker then I can reclaim the memory. -- Bill Fumerola - Network Architect / Computer Horizons Corp - CHIMES e-mail: billf@chimesnet.com / billf@FreeBSD.org / ircadmin@lsl.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message