From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 2 Feb 2001 13:27:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 2 Feb 2001 13:27:20 -0500 Received: from [204.244.205.8] ([204.244.205.8]:63474 "HELO mail.wizard.ca") by vger.kernel.org with SMTP id ; Fri, 2 Feb 2001 13:27:12 -0500 Date: Fri, 2 Feb 2001 10:27:29 -0800 From: Rob Bos To: linux-kernel@vger.kernel.org Subject: loopback driver hardlocking machine Message-ID: <20010202102729.A364@tech.wizard.ca> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="FL5UXtIhxfXey3p5" Content-Disposition: inline User-Agent: Mutt/1.2.5i Organisation: Wizard Internet/LinuxMagic X-Uptime: 10:17am up 7 min, 2 users, load average: 0.00, 0.13, 0.09 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --FL5UXtIhxfXey3p5 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Good day; I have been having consistent trouble with the last several kernels; all the test[9-12], 2.4.0 (all patched with reiser) and the 2.4.1 kernel (unpatched) seem to do this for me. I have devfs enabled as well, but this seems to happen with or without devfs. I don't believe it happened when I was running 2.2.18. bug description and reproducability: On copying to a loopback-mounted Minix filesystem, my machine seems to hardlock; it happens after the copy, and seems to happen most often when the disk is being heavily accessed for other purposes before that. The loopback filesystem has resided on both ext2 and reiser filesystems, with no change in frequency of crashes. Beyond that it is not reproducible; I have a couple of scripts that trigger this bug approximately one every five iterations - the machine is unable to write any more data to disk, unable to flush buffers, and after approximately thirty seconds, seems to hardlock, not accepting any input from any location (ICMP/IP, mouse, keyboard). The scripts that trigger this (makeinitrd.sh and makediskimage.sh, which both utilize mount-copy-unmount; it freezes right after copying all files) are attached, if that might help. I did in fact look through the bug-reporting document and the maintainers list, but did not find anyone who would be specifically concerned with this bug; I suppose the VFS maintainer might be interested, but I'm not sure if this is a loopback thing, a Minix thing, a reiserfs thing, a VFS thing, et al, so here you go. I am available at this email address for further information about my configuration. -- Rob Bos - System Administration Wizard Internet Services - http://www.wizard.ca http://linuxmagic.com Unix Administration, Website Hosting Network Services, Programming -------------------------------------------- (604) 589-0037 Beautiful British Columbia, Canada -------------------------------------------- Any and all opinions expressed herein are not necessarily the opinions of Wizard Internet Services. --FL5UXtIhxfXey3p5 Content-Type: application/x-sh Content-Disposition: attachment; filename="makediskimage.sh" #!/bin/bash # Creates new ramdisk image from ./initrd/* and puts it in disk/initrd.gz sync filename=vpn-`cat VERSION`.img if [ -d initrd ] && [ -d disk ] && [ -d mnt ]; then echo -n creating new blank disk image.. dd if=/dev/zero of=$filename bs=1k count=1440 > /dev/null 2>/dev/null echo done echo -n formatting blank disk image.. mkfs.msdos $filename > /dev/null echo done echo -n mounting disk image.. mount -o loop $filename mnt mount | grep loop | sed s/^.*type// echo -n copying root filesystem over.. cp -a disk/* mnt # Intermittently crashes while doing copy. sync echo done echo -n checking disk usage.. size=`du -s mnt | cut -f1` echo $size kilobytes echo -n unmounting disk image.. umount mnt; mount | grep loop && echo existing loops detected. echo done echo -n syslinux -sf $filename.. syslinux -sf $filename echo done else echo Directories missing. mnt, initrd, disk. Not in correct directory? exit 0 fi --FL5UXtIhxfXey3p5 Content-Type: application/x-sh Content-Disposition: attachment; filename="makeinitrd.sh" #!/bin/bash # Creates new ramdisk image from ./initrd/* and puts it in disk/initrd.gz sync if [ -d initrd ] && [ -d disk ] && [ -d mnt ]; then echo -n creating new ramdisk.. dd if=/dev/zero of=disk/initrd bs=1k count=4096 > /dev/null 2>/dev/null echo done echo -n formatting new ramdisk.. mkfs.minix disk/initrd > /dev/null #mkfs.minix disk/initrd echo done echo -n mounting ramdisk.. mount -o loop disk/initrd mnt mount | grep loop | sed s/^.*type// echo -n copying root filesystem over.. cp -a initrd/* mnt # Intermittently crashes while finishing copy. sync echo done echo -n unmounting ramdisk.. umount mnt; mount | grep loop && echo existing loops detected. echo done echo -n gzipping initrd.. gzip -f -9 disk/initrd; sync echo done else echo Directories missing. mnt, initrd, disk. Not in correct directory? exit 0 fi --FL5UXtIhxfXey3p5-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/