From owner-freebsd-questions Sun Apr 23 11:48:23 2000 Delivered-To: freebsd-questions@freebsd.org Received: from sigbus.com (sigbus.com [207.211.10.110]) by hub.freebsd.org (Postfix) with ESMTP id 0B78137B52A for ; Sun, 23 Apr 2000 11:48:21 -0700 (PDT) (envelope-from henrich@sigbus.com) Received: (from henrich@localhost) by sigbus.com (8.9.3/8.9.3) id LAA50349; Sun, 23 Apr 2000 11:48:10 -0700 (PDT) (envelope-from henrich) Date: Sun, 23 Apr 2000 11:48:10 -0700 From: Charles Henrich To: Greg Lehey Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Direct I/O Message-ID: <20000423114810.A50332@sigbus.com> References: <20000421165145.A44188@sigbus.com> <20000423104926.B4675@freebie.lemis.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0pre2i In-Reply-To: <20000423104926.B4675@freebie.lemis.com> X-Operating-System: FreeBSD 3.3-RELEASE X-PGP-Fingerprint: 1024/F7 FD C7 3A F5 6A 23 BF 76 C4 B8 C9 6E 41 A4 4F Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On the subject of Re: Direct I/O, Greg Lehey stated: > On Friday, 21 April 2000 at 16:51:45 -0700, Charles Henrich wrote: > > Is there anyway with FreeBSD's ffs to do direct filesystem I/O (a.k.a. XFS > > under IRIX?) > > Well, XFS is a file system, not a direct I/O facility. What exactly do you > mean? Unbuffered I/O to the filesystem, where the bits are copied directly into the space used by the process, or the kernel buffer being handed to the process, removing the extra copy from kernel buffer to userland buffer. -Crh Charles Henrich Manex Visual Effects henrich@sigbus.com http://www.sigbus.com/~henrich To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message