similar to: debug kernel

libvirt 3.4.0 centos 7.4 Hi: I want usr libvrit create vm to debug linux kernel. Previous , I usr qemu cmd(-gdb tcp::1234) directly. When I search on Internet, I found I can usr libvrt xml configure kgdb. <qemu:commandline> <qemu:arg value='-gdb'/> <qemu:arg value='tcp::1234'/> </qemu:commandline> But configure xml usr kgdb is

Did cvsup on a machine that does just mail processing (well, a lot of spam scanning) and it crashed not too much later. This kernel does not include MFC src/sys/kern/sys_process.c revisions 1.111 and 1.112: Use kmem_alloc_nofault() rather than kmem_alloc_pageable() in procfs_rwmem(). Use vm_page_hold() in place of vm_page_wire() since the page can be freed. Don't hold extra

Hi Ming, Could you share some experience on how to enable the xen debug? I try to build the xen with a kgdb patched kernel, but failed. Arhold ~~~~~~~~~~~~~~~~~~~~~~~ hi, I want to learn xen boot codes. I use bochs with gdb stub to implement source codes debug. I rebuild xen kernel with "debug=y, debugger=y" to enable debug, boot xen by bochs, connect gdb remote target, set

While I was tying down a supernet to the discard interface, the box crashed on me. Its a STABLE box from June 4th. I was in zebra at the time and thought I would route a /24 to ds0 instead of to the IP on ds0 (which I had done for a number of other aggregate routes). The only other "strange" thing about the box is that ds0 is loaded via kld. I will see if I can reproduce it on a

Hi everybody, today I met the following problems on my freebsd box. I had a USB stick of opensolaris bootable USB image and tried to mount it on my fbsd box. The first time, when I tried to mount the usb device, my system freezed and then rebooted giving me one core in my dumpdev. When I tried to redo the mounting, the kernel informed me that the filesystem needed to be fsck'd before

Some more crashes of 4.8-RELEASE. Lets see what do I have today: # ls -l /var/crash total 1576676 -rw-r--r-- 1 root wheel 2 Jul 30 13:31 bounds -rw-r--r-- 1 root wheel 2193252 Jun 25 17:30 kernel.0 -rw-r--r-- 1 root wheel 2193252 Jul 4 00:08 kernel.1 -rw-r--r-- 1 root wheel 2193252 Jul 15 19:28 kernel.2 -rw-r--r-- 1 root wheel 2193252 Jul 16 17:50 kernel.3

After some dialog with Terry Lambert on -hackers, I've been advised to post this here. I have a 4.7-RELEASE-p10 box that is suffering regular kernel panics. The machine is a Dell 2650 running primarily as a file/print server to a number of computer labs of about 400 machines (although it also functions as a rembo image server and squid proxy). It mainly stores applications, which

Not sure what all to do, but doing a 'gdb -k kernel.debug /dev/mem', a backtrack on one of the processes shows ... server has been up 12 days now, and running a June 8th kernel ... #0 0x20f4f0 in ?? () (kgdb) proc 67258 (kgdb) bt #0 mi_switch () at machine/globals.h:119 #1 0x8014a1f9 in tsleep (ident=0x8a3d2200, priority=8, wmesg=0x80263d4a "inode", timo=0) at

Hello, I'm running 6.4-PRELEASE, last built on 2008-10-05 with /usr/src updated on the same day. I had a panic that looks to me very similiar to the one described here (hence the subject): http://lists.freebsd.org/pipermail/freebsd-stable/2008-September/045405.html What caught my curiosity is the message: Unread portion of the kernel message buffer: acd0: WARNING - TEST_UNIT_READY read

Hi stable, nice you see you again. I was one of those guys who was seeing constand panics on 24 hour boundaries but couldn't provide a backtrace due to the ar device not taking a dump. I installed a dedicated drive just to take the dump, and then didn't have a panic for a couple weeks. Now, I am back with, and I have traces to share. The first two, from 2003-09-27 and 2003-09-28

Box with fresh RELENG_7 panic under heavy network load (more than 50k connections). This panics seems to be senfile(2) related, because when sendfile disabled in nginx, I can't reproduce the problem. Backtrace in all cases like this: # kgdb kernel /spool/crash/vmcore.1 GNU gdb 6.1.1 [FreeBSD] Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General

Every few days now I get a panic like the one shown in the attached backtrace. I've made sure my filesystem is clean with fsck and even turned off write caching on my IDE drive. Maybe someone here can figure out what is wrong. Let me know if you need more information. Michael -------------- next part -------------- root@taco /usr/src/sys/compile/ZOE> gdb -k -c /opt/savecore/vmcore.0

Hi there, from time to time my PC panics when I insert an empty DVD or CD-R. The kernel locks up instantly after the DVD writer's tray is closed. It seems burning the first DVD isn't critical but inserting the second one seems susceptible. I use k3b as software, which polls the hardware while the tray is open, maybe it's something with hald. Don't know, just use this. I

Hi, I need some help to understand a backtrace. The situation is as follows: A diskless system acting as a kind of bandwithshaping firewall with both ipfw2 and ipfilter active at the same time. Ipfilter is used for port adress translation. The system panics about once every 6 hours. The network load is very low, only one Windows XP machine is connected but not actively used. I added a disk

Hello, I've been having spurrious crash troubles with this box a while now and I haven't been able to figure out why. I've ran a couple memtest passes on it and it didn't pick up anything. Here's a backtrace I've been able to obtain. The kernel config is at the end. It's the generic kernel with ULE. I'm following chapter 11 of the developers' handbook, so if

hi, I am using xen-unstable version and I can use the serial port to debug DomU openSuSE Linux with kgdb very well. But it doesn''t work when I am trying to debug DomU WinXP with windbg. I happened to find this link http://www.evilbitz.com/2006/12/13/howto-debugging-a-remote-windows-hvm-under-xen-using-windbg/, but it still doesn''t work for me. Any suggestions about this?

Hi, Two cores over the weekend, same assert message in syslog: imap(user): file message-body-search.c: line 393 (message_body_search_ctx): assertion failed: (input->v_offset <= part->physical_pos) Setup: Solaris 9, imap usage only, mbox format, dovecot compiled with gcc 4.0.1. gdb sessions of the two core files attached. Let me know if you need further analysis of the cores.

Hello, There it is, all my computers on FreeBSD 9.1-RELEASE had panic. I can just say there is a problem in the 9.1-RELEASE because I had no panic before. What afraid me is that my production server also panic'ed a few days ago, fortunately it does not appears so often. This is a panic that happened on my desktop computer, with a graphic card. The crash usually appears when X starts. GNU

[ Asked on -questions on Friday; re-asking now on -stable without cross-post] I recently upgraded a 4.11-REL machine to 6.0-REL and have run into some snags. While the installation from CD went fine, after configuring and enabling my ed0 NIC, bad things start to happen. FWIW, this machine is an ancient (hardware circa 1991, BIOS circa 1994) dual-Pentium 133 MHz machine, with EISA/PCI and

Hello, My server is experiencing occasional kernel panics when under moderate load. I'm attaching a crash dump and the dmesg output. I'm not sure how to read the kernel backtrace but it looks like the Intel NIC (em0) caused the problem. Occasionally, I used to get a "em0: watchdog timeout -- resetting" error message, but I never had a kernel panic. The problem started last