Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 11 Mar 2003 12:56:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 11 Mar 2003 12:56:08 -0500 Received: from hellcat.admin.navo.hpc.mil ([204.222.179.34]:47585 "EHLO hellcat.admin.navo.hpc.mil") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Tue, 11 Mar 2003 12:56:06 -0500 Content-Type: text/plain; charset=US-ASCII From: Jesse Pollard To: Prasad , lkml Subject: Re: [Resending] User Process and a Kernel Thread Date: Tue, 11 Mar 2003 12:04:48 -0600 User-Agent: KMail/1.4.1 References: In-Reply-To: MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: <200303111204.48708.pollard@admin.navo.hpc.mil> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1066 Lines: 34 On Tuesday 11 March 2003 11:37 am, Prasad wrote: > Resending the mail... > > Hi all, > Whats the difference between the user process and a kernel thread? Kernel process/thread has access to all hardware capability. No security can be envorced. User process is limited to the memory the kernel allocates to the process. No direct device access, no access to all system resources. All hardware access is mediated by the kernel. Some privileged operations can be delegated to a user process (see X server running without frame buffer support). > IS it possible to make the kernel thread a user process? No >if yes, how do we > do that? > > Prasad. -- ------------------------------------------------------------------------- Jesse I Pollard, II Email: pollard@navo.hpc.mil Any opinions expressed are solely my own. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/