From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262454AbVGLVIQ (ORCPT ); Tue, 12 Jul 2005 17:08:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262423AbVGLVFa (ORCPT ); Tue, 12 Jul 2005 17:05:30 -0400 Received: from caramon.arm.linux.org.uk ([212.18.232.186]:33801 "EHLO caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP id S262432AbVGLVD5 (ORCPT ); Tue, 12 Jul 2005 17:03:57 -0400 Date: Tue, 12 Jul 2005 22:03:48 +0100 From: Russell King To: karl malbrain Cc: linux-kernel@vger.kernel.org Subject: Re: 2.6.9: serial_core: uart_open Message-ID: <20050712220348.D11389@flint.arm.linux.org.uk> Mail-Followup-To: karl malbrain , linux-kernel@vger.kernel.org References: <02ad01c58710$ab9851c0$4b010059@petzent.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <02ad01c58710$ab9851c0$4b010059@petzent.com>; from karl@petzent.com on Tue, Jul 12, 2005 at 11:36:51AM -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 12, 2005 at 11:36:51AM -0700, karl malbrain wrote: > The uart_open code loops waiting for CD to be asserted (whenever CLOCAL > is not set). The bottom of the loop contains the following code: > > up(&state->sem); > schedule(); > down(&state->sem); > > if( signal_pending(current) ) > break; This does cause the process to sleep - in an interruptible wait. Please give more details about the problem you're seeing. Have you tried getting a process listing from a different virtual console, xterm or whatever you normally use? What does that say? -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core