From owner-freebsd-net@FreeBSD.ORG Wed May 28 09:07:34 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 567CD37B405 for ; Wed, 28 May 2003 09:07:34 -0700 (PDT) Received: from khavrinen.lcs.mit.edu (khavrinen.lcs.mit.edu [18.24.4.193]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1A37F43FB1 for ; Wed, 28 May 2003 09:07:33 -0700 (PDT) (envelope-from wollman@khavrinen.lcs.mit.edu) Received: from khavrinen.lcs.mit.edu (localhost [IPv6:::1]) by khavrinen.lcs.mit.edu (8.12.9/8.12.9) with ESMTP id h4SG7TVo049545 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 28 May 2003 12:07:29 -0400 (EDT) (envelope-from wollman@khavrinen.lcs.mit.edu) Received: (from wollman@localhost) by khavrinen.lcs.mit.edu (8.12.9/8.12.9/Submit) id h4SG7SwR049542; Wed, 28 May 2003 12:07:28 -0400 (EDT) (envelope-from wollman) Date: Wed, 28 May 2003 12:07:28 -0400 (EDT) From: Garrett Wollman Message-Id: <200305281607.h4SG7SwR049542@khavrinen.lcs.mit.edu> To: Igor Sysoev In-Reply-To: References: X-Spam-Score: -19.8 () IN_REP_TO,QUOTED_EMAIL_TEXT,REFERENCES,REPLY_WITH_QUOTES X-Scanned-By: MIMEDefang 2.33 (www . roaringpenguin . com / mimedefang) cc: freebsd-net@freebsd.org Subject: turning off TCP_NOPUSH X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 May 2003 16:07:34 -0000 < said: > always calls tcp_output() when TCP_NOPUSH is turned off. I think > tcp_output() should be called only if data in the send buffer is less > than MSS: I believe that this is intentional. The application had to explicitly enable TCP_NOPUSH, so if the application disables it explicitly, then we interpret that as meaning that the application wants to send a PSH segment immediately. -GAWollman