From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754021Ab0FNOiS (ORCPT ); Mon, 14 Jun 2010 10:38:18 -0400 Received: from mail-fx0-f46.google.com ([209.85.161.46]:62461 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752512Ab0FNOiR convert rfc822-to-8bit (ORCPT ); Mon, 14 Jun 2010 10:38:17 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:reply-to:to:subject:date:user-agent:cc:references:in-reply-to :mime-version:content-type:content-transfer-encoding:message-id; b=kVekZygw0JGeYO+j/ynJZtXXG1bubcnXlLqQpPuW7bA79YcX70YwQxXJpggKXyNHrA +gGJs9F0WaM1UFU+tMgNyMKuhL0FiIT09kB2k4O9P8pIHpIPoS8yXO3BygPL606PwcRI Mxkn6WjyYMBdZCfI2PxGT7QBteV8ijlYG13XI= From: Maciej Rutecki Reply-To: maciej.rutecki@gmail.com To: Ales Teska Subject: Re: PROBLEM: PPP and other serial port related application hangs in kernel space Date: Mon, 14 Jun 2010 16:38:10 +0200 User-Agent: KMail/1.12.4 (Linux/2.6.35-rc3; KDE/4.3.4; i686; ; ) Cc: linux-kernel@vger.kernel.org References: <900E3B14-5B92-4A37-9581-049DB40F4D1C@gmail.com> In-Reply-To: <900E3B14-5B92-4A37-9581-049DB40F4D1C@gmail.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 8BIT Message-Id: <201006141638.10734.maciej.rutecki@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On środa, 9 czerwca 2010 o 22:46:28 Ales Teska wrote: > Hi all, > > after upgrade of Linux kernel to version 2.6.34 I started to observe > following problem - ppp and other serial port related application > occasionally (in 1 hour or 1/10 ppp connections) 'hangs' (see description > bellow) rendering related serial device unusable. I backtracked this issue > to 2.6.32.15. Application remains in the condition marked as 'D' in 'ps' > output (waiting for result from kernel space, if I understand that > correctly); it stays in this condition forever. Moreover any other > application that tries to open same serial port hangs the same way. > I created a Bugzilla entry at https://bugzilla.kernel.org/show_bug.cgi?id=16206 for your bug report, please add your address to the CC list in there, thanks! -- Maciej Rutecki http://www.maciek.unixy.pl