From owner-freebsd-hackers Wed May 17 9: 7:49 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from www0a.netaddress.usa.net (www0a.netaddress.usa.net [204.68.24.30]) by hub.freebsd.org (Postfix) with SMTP id 02C7437B7B7 for ; Wed, 17 May 2000 09:07:47 -0700 (PDT) (envelope-from joy.ganguly@usa.net) Received: (qmail 12769 invoked by uid 60001); 17 May 2000 16:07:46 -0000 Message-ID: <20000517160746.12768.qmail@www0a.netaddress.usa.net> Received: from 204.68.24.30 by www0a for [206.20.52.130] via web-mailer(34FM1.4.02C) on Wed May 17 16:07:46 GMT 2000 Date: 17 May 00 10:07:46 MDT From: Joy Ganguly To: freebsd-hackers@freeBSD.org Subject: Question about file write???? X-Mailer: USANET web-mailer (34FM1.4.02C) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG hi all, = i have written a special ioctl which writes data into a file from a buffe= r in kernel memory. it invokes fo->fo_write() and involves one copy from kerne= l mem to disk cache. however this takes substantially more time than an ordinar= y write which copies from user space to the disk cache. any explanations???= = thanx in advance = joy = ____________________________________________________________________ Get free email and a permanent address at http://www.netaddress.com/?N=3D= 1 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message