From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 16 May 2001 09:32:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 16 May 2001 09:32:35 -0400 Received: from mail.eastlink.de ([213.187.64.4]:63492 "EHLO mail.eastlink.de") by vger.kernel.org with ESMTP id ; Wed, 16 May 2001 09:32:27 -0400 Message-ID: <3B0280E4.5070600@eastlink.de> Date: Wed, 16 May 2001 15:30:12 +0200 From: Andreas Schultz User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; 0.8.1) X-Accept-Language: en MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: 2.4.4/2.4.5-pre2 process semi stuck in n_tty.c:write_chan Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi, I just installed a new system using 2.4.4 and later tried 2.4.5pre2 and 2.4.4ac6 and ac9. All versions show the same behaivior. When doing a "cat /var/log/messages", the output slows down after the first 30 lines and comes to an almost complete stop, with a few lines showing up every 10sec or so. A "ps -eo pid,tt,user,fname,tmout,f,nwchan,wchan" shows the process sitting in write_chan in n_tty.c line 1198. I realize that this information is probably not enough to find out whats going on, could you please advise me on what further information is needed and how to get it. Thanks Andreas ---- snip ---- if (!nr) break; if (file->f_flags & O_NONBLOCK) { retval = -EAGAIN; break; } here ===> schedule(); } break_out: current->state = TASK_RUNNING; remove_wait_queue(&tty->write_wait, &wait); return (b - buf) ? b - buf : retval; } ---- snip ----