From owner-cvs-all Wed Jan 22 7:47:37 2003 Delivered-To: cvs-all@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7A1D937B41D; Wed, 22 Jan 2003 07:47:32 -0800 (PST) Received: from mail.nsu.ru (mx.nsu.ru [193.124.215.71]) by mx1.FreeBSD.org (Postfix) with ESMTP id 906B143F18; Wed, 22 Jan 2003 07:47:30 -0800 (PST) (envelope-from danfe@regency.nsu.ru) Received: from drweb by mail.nsu.ru with drweb-scanned (Exim 3.20 #1) id 18bN5m-0000lA-00; Wed, 22 Jan 2003 21:47:06 +0600 Received: from regency.nsu.ru ([193.124.210.26]) by mail.nsu.ru with esmtp (Exim 3.20 #1) id 18bN5l-0000kr-00; Wed, 22 Jan 2003 21:47:05 +0600 Received: from regency.nsu.ru (localhost [127.0.0.1]) by regency.nsu.ru (8.12.6/8.12.6) with ESMTP id h0MFoWH7082385; Wed, 22 Jan 2003 21:50:32 +0600 (NOVT) (envelope-from danfe@regency.nsu.ru) Received: (from danfe@localhost) by regency.nsu.ru (8.12.6/8.12.6/Submit) id h0MFoRsm082365; Wed, 22 Jan 2003 21:50:27 +0600 (NOVT) Date: Wed, 22 Jan 2003 21:50:27 +0600 From: Alexey Dokuchaev To: Scott Long Cc: Bosko Milekic , Nate Lawson , Bruce Evans , Alfred Perlstein , cvs-committers@freebsd.org, cvs-all@freebsd.org Subject: Re: cvs commit: src/sys/alpha/alpha busdma_machdep.c src/sys/alpha/osf1 imgact_osf1.c osf1_misc.c src/sys/cam cam_periph.c cam_sim.c cam_xpt.c src/sys/cam/scsi scsi_cd.c scsi_ch.c scsi Message-ID: <20030122155027.GB63624@regency.nsu.ru> References: <20030122100003.K30758-100000@gamplex.bde.org> <20030121203745.A74950@unixdaemons.com> <3E2DF620.2040700@btc.adaptec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3E2DF620.2040700@btc.adaptec.com> User-Agent: Mutt/1.4i X-Envelope-To: bde@zeta.org.au, bmilekic@unixdaemons.com, nate@root.org, cvs-all@freebsd.org, alfred@freebsd.org, cvs-committers@freebsd.org, scott_long@btc.adaptec.com Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Tue, Jan 21, 2003 at 06:38:40PM -0700, Scott Long wrote: > Bosko Milekic wrote: > > > > The compatibility argument doesn't really carry that much weight > > 'cause you have to remember that our semantics are actually different > > from the other BSDs. I can certainly confirm this for the mbuf code. > > For example, we already have a different name for the "wait" > > equivalent of the flag (it's M_TRYWAIT not M_WAIT) and, further, > > calling the allocator function with M_TRYWAIT for us doesn't mean the > > same thing as calling the allocator function with M_WAIT does on the > > other BSDs (for the mbuf code, anyway). Furthermore, I think that the > > other BSDs still actually 'share' the wait and dontwait flags with the > > between the malloc() and mbuf allocator subsystems (somewhat for > > historical reasons on which I can elaborate if you think that it's > > necessary). > > > > Clearly, we've already got not only API differences but even more > > importantly semantics differences with the other BSDs in this area. > > Fighting to keep the old code for 'compatibility' reasons is therefore > > kind of pointless. > > > >Regards, > > Bosko, > > I think that Nate's concern was *binary* compatibilty with 5.0, i.e. being > able to load 5.0 kld's on a 5.1 system. It's a very noble and worthy goal > to attempt, though at this point I don't know if it's possible. Considering "special" status of 5.0, it seems fine to treat binary compatibility as ability yo load >=5.1(2) kld's on further 5.x series. ./danfe To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message