From owner-freebsd-hackers Thu Nov 21 11:31:30 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9A03A37B404 for ; Thu, 21 Nov 2002 11:31:27 -0800 (PST) Received: from bas.flux.utah.edu (bas.flux.utah.edu [155.98.60.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2345843E3B for ; Thu, 21 Nov 2002 11:31:27 -0800 (PST) (envelope-from danderse@flux.utah.edu) Received: from bas.flux.utah.edu (localhost [127.0.0.1]) by bas.flux.utah.edu (8.12.5/8.12.5) with ESMTP id gALJVQAs084050 for ; Thu, 21 Nov 2002 12:31:26 -0700 (MST) (envelope-from danderse@bas.flux.utah.edu) Received: (from danderse@localhost) by bas.flux.utah.edu (8.12.5/8.12.5/Submit) id gALJVQ6t084049 for hackers@freebsd.org; Thu, 21 Nov 2002 12:31:26 -0700 (MST) Date: Thu, 21 Nov 2002 12:31:26 -0700 From: "David G. Andersen" To: hackers@freebsd.org Subject: Changing socket buffer timeout to a u_long? Message-ID: <20021121123126.E75421@cs.utah.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i 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 Are there compelling reasons not to change the socket buffer timeout to a u_long from a u_short? This variable stores the number of ticks before the socket operation times out. At present, the maximum SO_RCVTIMEO or SO_SNDTIMEO value one can set is SHRT_MAX / hz. With a 100Hz kernel, this comes to about 330 seconds, but with a 1000Hz kernel or faster, it's reduced to under 1 minute, which tends to break some apps when running on a high-hz kernel. Particularly for weirdos who use HZ=10000 for dummynet purposes and network measurement, increasing the storage to a u_long would make life a bit happier for all sorts of code that wants to set a 1 minute timeout. -Dave (not on -hackers anymore, please CC) -- work: dga@lcs.mit.edu me: dga@pobox.com MIT Laboratory for Computer Science http://www.angio.net/ I do not accept unsolicited commercial email. Do not spam me. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message