From owner-freebsd-hackers Sat May 20 5: 2:46 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from bingnet2.cc.binghamton.edu (bingnet2.cc.binghamton.edu [128.226.1.18]) by hub.freebsd.org (Postfix) with ESMTP id E099837B589 for ; Sat, 20 May 2000 05:02:41 -0700 (PDT) (envelope-from zzhang@cs.binghamton.edu) Received: from sol.cs.binghamton.edu (sol.cs.binghamton.edu [128.226.123.100]) by bingnet2.cc.binghamton.edu (8.9.3/8.9.3) with ESMTP id IAA12365; Sat, 20 May 2000 08:02:36 -0400 (EDT) Date: Sat, 20 May 2000 08:01:44 -0400 (EDT) From: Zhihui Zhang To: Joy Ganguly Cc: freebsd-hackers Subject: Re: OBJ_OPT??? In-Reply-To: <3925B8EE.E901BB31@falcon.niksun.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, 19 May 2000, Joy Ganguly wrote: > hi all > > what does the flag OBJ_OPT mean?? i read it deals with some sort of IO > optimization. but i dont know what it actually does. any insights on > this?? IIRC, when you do an I/O on a file and some of the pages of that file are already in the memory. In this case, you only need to fix the mapping without any real I/O on these page, this is called I/O OPTmization. -Zhihui To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message