From owner-freebsd-stable Mon Jul 29 1:20:35 2002 Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D5F9E37B400 for ; Mon, 29 Jul 2002 01:20:32 -0700 (PDT) Received: from woozle.rinet.ru (woozle.rinet.ru [195.54.192.68]) by mx1.FreeBSD.org (Postfix) with ESMTP id 32B0D43E6E for ; Mon, 29 Jul 2002 01:20:31 -0700 (PDT) (envelope-from marck@rinet.ru) Received: from localhost (marck@localhost) by woozle.rinet.ru (8.11.6/8.11.6) with ESMTP id g6T8KEi36423; Mon, 29 Jul 2002 12:20:14 +0400 (MSD) (envelope-from marck@rinet.ru) Date: Mon, 29 Jul 2002 12:20:14 +0400 (MSD) From: Dmitry Morozovsky To: Gregory Bond Cc: Clifton Royston , Subject: Re: Is use of -O2 still deprecated for buildworld in -stable? In-Reply-To: <200207290447.OAA22147@lightning.itga.com.au> Message-ID: <20020729121517.A35799-100000@woozle.rinet.ru> X-NCC-RegID: ru.rinet MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Mon, 29 Jul 2002, Gregory Bond wrote: GB> > My understanding is that whether or not -O2 *should* produce exactly GB> > equivalent code to -O, there are recurrent reports of people having GB> > trouble doing a buildworld with -O2 in -stable or in 4.x release GB> > trains, where their problems go away when they revert back to -O. GB> GB> The TCP checksum code seems to be the most common culprit - compiling with -O2 GB> seems to create checksum routines that fail in certain corner cases, meaning GB> some hosts or some data patterns cause TCP sessions to freeze. GB> GB> [I've not seen it myself, but it has been reported here a couple of times.] It possibly has been fixed recently: http://docs.freebsd.org/cgi/getmsg.cgi?fetch=727930+0+archive/2002/cvs-all/20020707.cvs-all Sincerely, D.Marck [DM5020, DM268-RIPE, DM3-RIPN] ------------------------------------------------------------------------ *** Dmitry Morozovsky --- D.Marck --- Wild Woozle --- marck@rinet.ru *** ------------------------------------------------------------------------ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message