From owner-freebsd-hackers@FreeBSD.ORG Wed Nov 22 20:02:54 2006 Return-Path: X-Original-To: freebsd-hackers@freebsd.org Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 40B3216A4FB for ; Wed, 22 Nov 2006 20:02:54 +0000 (UTC) (envelope-from bharmaji@gmail.com) Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.189]) by mx1.FreeBSD.org (Postfix) with ESMTP id 41EE643F5B for ; Wed, 22 Nov 2006 20:02:02 +0000 (GMT) (envelope-from bharmaji@gmail.com) Received: by nf-out-0910.google.com with SMTP id x37so597010nfc for ; Wed, 22 Nov 2006 12:02:30 -0800 (PST) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type; b=b/47BRZ3gp95k+ySkgfIYPrWUooUajX2krazs/DJ4EamvMgOoFb+QdbOXZWVW+SGmzAISRqBEIn77E4Si7dtj6AfHeGly3sJkb5960bbuJLPZ+cAz8UDtzDIwyMU4aWk3IhVcU2NGiTZrvtef9YGVU6EHhh1CmCTwwss76fhn5U= Received: by 10.82.123.16 with SMTP id v16mr1296749buc.1164225750285; Wed, 22 Nov 2006 12:02:30 -0800 (PST) Received: by 10.82.146.3 with HTTP; Wed, 22 Nov 2006 12:02:30 -0800 (PST) Message-ID: <67beabb0611221202l2bb9a320o601feff7e7b3aa68@mail.gmail.com> Date: Wed, 22 Nov 2006 12:02:30 -0800 From: "Bharma Ji" To: freebsd-hackers@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Is there any way to avoid copy between the kernel and userland 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: Wed, 22 Nov 2006 20:02:54 -0000 Hi I am looking for any FreeBSD facility that will allow a userland process to pass data to the kernel without doing a copyin or copyout e.g. using a shared data structure (queue? ) for example? Any pointers will be useful Thanks