From owner-freebsd-hackers Fri Jul 13 6:53:12 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from netbank.com.br (garrincha.netbank.com.br [200.203.199.88]) by hub.freebsd.org (Postfix) with ESMTP id 2E89637B401 for ; Fri, 13 Jul 2001 06:53:09 -0700 (PDT) (envelope-from riel@conectiva.com.br) Received: from surriel.ddts.net (2-203.cwb-adsl.brasiltelecom.net.br [200.193.161.203]) by netbank.com.br (Postfix) with ESMTP id 535F346810; Fri, 13 Jul 2001 10:52:03 -0300 (BRST) Received: from localhost (avjkkp@localhost [127.0.0.1]) by surriel.ddts.net (8.11.4/8.11.2) with ESMTP id f6DDr1F03901; Fri, 13 Jul 2001 10:53:02 -0300 Date: Fri, 13 Jul 2001 10:53:01 -0300 (BRST) From: Rik van Riel X-X-Sender: To: Matt Dillon Cc: Leo Bicknell , Subject: Re: Network performance tuning. In-Reply-To: <200107130128.f6D1SFE59148@earth.backplane.com> Message-ID: X-spambait: aardvark@kernelnewbies.org X-spammeplease: aardvark@nl.linux.org MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Thu, 12 Jul 2001, Matt Dillon wrote: > yield an immediate improvement in available mbuf space. For the receive > side of things we can't really do anything with existing connections > (because we've already advertised that the space is available to the > remote end), In emergencies it should be easy enough to just not ack the packets and drop them, this should cause the remote end to slow down and the connection to use less memory. Not the most elegant method, but probably usable DoS protection. cheers, Rik -- Virtual memory is like a game you can't win; However, without VM there's truly nothing to lose... http://www.surriel.com/ http://distro.conectiva.com/ Send all your spam to aardvark@nl.linux.org (spam digging piggy) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message