Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756963Ab0KAJt4 (ORCPT ); Mon, 1 Nov 2010 05:49:56 -0400 Received: from mail-iw0-f174.google.com ([209.85.214.174]:49992 "EHLO mail-iw0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751017Ab0KAJty convert rfc822-to-8bit (ORCPT ); Mon, 1 Nov 2010 05:49:54 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=QZnpF+SqfBb+loT3XoWE8tuvWHWnRdYxAYqm68MKwfYKXUogLlsjHNRy+69420G8Vm jQB0xHmnYMnm1lo35cm3LEE44zr0UDNcmH5nl6bs4d/XXFq2EeYeKHvMLdbZanGGhiCD ZelMG1r1svhV54sw0aZAoLAr6IDoyanI5uiTg= MIME-Version: 1.0 In-Reply-To: References: <20101101092947.GB6023@cr0.nay.redhat.com> Date: Mon, 1 Nov 2010 17:49:53 +0800 Message-ID: Subject: Re: How many params can be accept by kernel module at most? From: tingwei liu To: =?UTF-8?Q?Am=C3=A9rico_Wang?= Cc: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1119 Lines: 27 The params are transferred by command line. And the params are all in program statically. So the stack size determine the params number. For example: stack size is 4K,and params are unsigned int type with 4 bytes,so the max number of params is 1 thousand。 2010/11/1 tingwei liu : > What's the meaning of dynamically and statically? > You response help me much. Thank you > > 2010/11/1 Américo Wang : >> On Mon, Nov 01, 2010 at 02:17:23PM +0800, tingwei liu wrote: >>>How many params can be accept by kernel module at most? >> >> If you mean dynamically, these parameters are passed as a whole to kernel, >> from the source code, you can see the max length is ~0UL>>1. >> >> If you mean statically, IOW, the max paramenters you can provide in your module, >> this is limited by ELF section size. >> >> Hope this helps. >> > -- 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/