From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262758AbUDTMir (ORCPT ); Tue, 20 Apr 2004 08:38:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262810AbUDTMir (ORCPT ); Tue, 20 Apr 2004 08:38:47 -0400 Received: from smtp.gentoo.org ([128.193.0.39]:24204 "EHLO smtp.gentoo.org") by vger.kernel.org with ESMTP id S262758AbUDTMin (ORCPT ); Tue, 20 Apr 2004 08:38:43 -0400 From: Jason Cox To: linux-kernel@vger.kernel.org Subject: [PATCH] Change number of tty devices In-Reply-To: References: Organization: Gentoo X-Mailer: Sylpheed version 0.9.4 (GTK+ 1.2.10; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Message-Id: Date: Tue, 20 Apr 2004 12:38:43 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 19 Apr 2004 22:38:53 +0000 Jason Cox wrote: > Hello all, > > Often, I have wondered what the need for 64 tty devices in /dev is. I began tinkering with the code and am wondering why it's not user configurable. I came up with a quick patch to add it as an option under drivers/char/Kconfig. I also made a lower bound of 12. If this is an idea worth pursuing, please let me know. If this idea has been rejected before, I apologize. What do you think of this idea? > > Thanks You, > Jason Cox > > I have come up with a saner patch which adds VT as a dependancy and a help option. Please review and tell me where I went wrong. This is diffed against 2.6.6-rc1-mm1. Thanks again, Jason Cox diff -urN linux-2.6.5/drivers/char/Kconfig linux-2.6.6_rc1-love1/drivers/char/Kconfig --- linux-2.6.5/drivers/char/Kconfig 2004-04-19 16:01:50.000000000 -0500 +++ linux-2.6.6_rc1-love1/drivers/char/Kconfig 2004-04-19 22:13:27.888080179 -0500 @@ -57,6 +57,16 @@ If unsure, say Y. +config NR_TTY_DEVICES + int "Maximum tty device number" + depends on VT + default 63 + ---help--- + This is the highest numbered device created in /dev. You will actually have + NR_TTY_DEVICES+1 devices in /dev. The default is 63, which will result in + 64 /dev entries. The lowest number you can set is 11, anything below that, + and it will default to 11. + config HW_CONSOLE bool depends on VT && !S390 && !UM diff -urN linux-2.6.5/include/linux/tty.h linux-2.6.6_rc1-love1/include/linux/tty.h --- linux-2.6.5/include/linux/tty.h 2004-04-19 11:04:19.000000000 -0500 +++ linux-2.6.6_rc1-love1/include/linux/tty.h 2004-04-19 22:05:48.824673446 -0500 @@ -10,8 +10,13 @@ * resizing). */ #define MIN_NR_CONSOLES 1 /* must be at least 1 */ -#define MAX_NR_CONSOLES 63 /* serial lines start at 64 */ -#define MAX_NR_USER_CONSOLES 63 /* must be root to allocate above this */ +#if (CONFIG_NR_TTY_DEVICES < 11) +#define MAX_NR_CONSOLES 11 +#define MAX_NR_USER_CONSOLES 11 +#else +#define MAX_NR_CONSOLES CONFIG_NR_TTY_DEVICES +#define MAX_NR_USER_CONSOLES CONFIG_NR_TTY_DEVICES +#endif /* Note: the ioctl VT_GETSTATE does not work for consoles 16 and higher (since it returns a short) */