From owner-freebsd-hackers@FreeBSD.ORG Thu Oct 30 15:47:14 2008 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 6FDC41065675 for ; Thu, 30 Oct 2008 15:47:14 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from QMTA06.westchester.pa.mail.comcast.net (qmta06.westchester.pa.mail.comcast.net [76.96.62.56]) by mx1.freebsd.org (Postfix) with ESMTP id D37FB8FC17 for ; Thu, 30 Oct 2008 15:47:13 +0000 (UTC) (envelope-from jdc@koitsu.dyndns.org) Received: from OMTA10.westchester.pa.mail.comcast.net ([76.96.62.28]) by QMTA06.westchester.pa.mail.comcast.net with comcast id Z0yv1a0010cZkys563mjBn; Thu, 30 Oct 2008 15:46:43 +0000 Received: from koitsu.dyndns.org ([69.181.141.110]) by OMTA10.westchester.pa.mail.comcast.net with comcast id Z3nC1a0012P6wsM3W3nCS2; Thu, 30 Oct 2008 15:47:12 +0000 X-Authority-Analysis: v=1.0 c=1 a=QycZ5dHgAAAA:8 a=rsvOncigLXaxPRxJ5bwA:9 a=_ny0s83bTFZhnML9DesDFqnUJMsA:4 a=EoioJ0NPDVgA:10 a=CWfAmLVWKswA:10 Received: by icarus.home.lan (Postfix, from userid 1000) id A9B24C9419; Thu, 30 Oct 2008 08:47:11 -0700 (PDT) Date: Thu, 30 Oct 2008 08:47:11 -0700 From: Jeremy Chadwick To: freebsd-hackers@freebsd.org Message-ID: <20081030154711.GA8416@icarus.home.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) Subject: open(2) and O_NOATIME X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Oct 2008 15:47:14 -0000 I've recently been reading about Linux's O_NOATIME flag to open(2), and I'm curious why we haven't implemented this. There seem to be a lot of good reasons to implement such a thing. Chances are it's due to lack of time/interest, which is expected, but I was wondering if there were other reasons. I realise mount's noatime trumps this, but there are lots of scenarios where atime is desired as a default, but disabled in specific cases. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |