search for: kdb

Is there any way (short of not patching it into the kernel) to turn KDB off on a given machine? There are some machines I do not want dropping into kdb when/if it oopses. Thanx, b.

I asked this a few weeks ago but didn''t get a response, so at the risk of being a nag, I''ll abbreviate and restate. I know there are other Xen specific debuggers, but I want to know if there''s any reason why SGI''s kdb, http://oss.sgi.com/projects/kdb, should not be included in a dom0 pv-ops kernel? While the patches apply cleanly and build, the result is that one drops into kdb on an oops the serial keyboard is non-functional. Is this a problem inherent in including an incompatible debugger, or perhaps just som...

hi, I am wondering if anybody is doing Xen or Dom0 debugging with gdb here. If yes, could you show me the procedure of doing that? Thanks, Neo -- I would remember that if researchers were not ambitious probably today we haven''t the technology we are using! _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi, I have been trying to debug Xen using kdb. However, I am unable to successfully boot dom0 after compiling and installing kdb. Software/hardware config: Base distribution - Debian Lenny (64-bit) on a Dell desktop (Optiplex 780) with a serial cable to another machine. Xen 4.0.1 (without kdb) works fine. Here are the steps I followed to set...

Hi Guys, Thanks for the interest in the xen hypervisor debugger, prev known as kdb. Btw. I''m gonna rename it to xdb for xen-debugger or hdb for hypervisor debugger. KDB is confusing people with linux kdb debugger and I often get emails where people think they need to apply linux kdb patch also... Anyways, attaching patch that is cleaned up of my debug code that I accid...

I admit I was scepticle of this suggestion - but it actually seems to have worked. COmpiling a straight GENERIC kernel with KDB and DDB included do seem to have made my irq22 interrupt storms go away. Certainly I have spent some time trying to provoke the problem and not managed to make it read it's ugly head again. The thing is though, this doen't make me particularly happy - as I am sure that KDB and DDB are not...

Please give me some pointers... Thanks a lot!

Hi, kdb: to debug xen hypervisor, could also debug guests gdbsx: to debug PV/HVM linux guests The tree is : http://xenbits.xensource.com/ext/debuggers.hg See README-dbg. You''ll need to setup serial access for kdb. Thanks, Mukesh > > Hi Dan, > > I''m currently using yo...

There is a patch for xen linux 2.6.10 that enables kdb. It works with the xen 2.0.3 and xen-2.0-testing. (I intend to keep it current with 2.0-testing, but I can''t guarantee instant currency every time there are changes to the test branch.) The patch and a brief HOWTO are located at http://www.ncultra.org/xen/kdb/ kdb works with both privi...

...y recover from a power loss so I am finally going to break down and spend some time with ext3. I dl'ed the ext3-0.0.6b.tar.gz and unzipped it in /usr/src. Then I installed kernel-source-2.2.19-6.2.1.i386.rpm from redhat I then treid to apply the patches: cat ../ext3-0.0.6b/linux-2.2.19pre14.kdb.diff | patch -sp1 cat ../ext3-0.0.6b/linux-2.2.19pre14.ext3.diff | patch -sp1 But got prompted for which file to patch and not knowing what to do I returned through them and got nastygrams about hunks being ingnored. This I can see since I did not tell it what to do. Can I apply these patched to...

Hello All, I am running Linux 2.4.7-10, 2.4.18-4 and 2.4.19-pre9, I see the following oops quite often (mainly on 2.4.19-pre9 with kdb). All the kernels I use have the kdb patch installed. 1 kmem_cache_alloc (offset 0x125) get_unused_buffer_head journal_write_metadata_buffer journal_commit_transaction kjournald kernel_thread kmem_cache_alloc dis xchg %eax, (%ebx) cmp $0x5a2cf071, %eax (where did a value like that come from?) j...

When trying to build ext3 as a module, I get the follwing errors during the kernel link: /usr/bin/kgcc -D__KERNEL__ -I/home/brian/src/kernel-2.2.19-pre6mvd/linux-2.2.19pre6-kdb-ext3/include -c -o dummy_sym.o dummy_sym.c ld -m elf_i386 -T /home/brian/src/kernel-2.2.19-pre6mvd/linux-2.2.19pre6-kdb-ext3/arch/i386/vmlinux.lds -e stext arch/i386/kernel/head.o arch/i386/kernel/init_t ask.o -Map map init/main.o init/version.o \ --start-group \ arch/i386/kernel/k...

Fix the polling section of the hvc driver to use the global "last_hvc" variable, rather than the ttys. With this change debugging a xen dom0 kernel is possible via the following kernel parameter: kgdboc=hvc0 Signed-off-by: Ben Guthro <Benjamin.Guthro@citrix.com> diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 2d691eb..3750e74 100644 ---

...pres 1, def32 1, gran 0 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 1943 (cc) trap number = 12 panic: page fault %nm -n XENUkernelNFS |grep c0183343 c0183343 T cpu_switch_load_gs This is with a kernel compiled to run diskless over nfs and no kdb. With KDB enabled the machine just hangs (I assume the debugger is trying to attach to a non-existent serial port) Should I be running 2.0.7 2.0-testing or 3.x to stand the best chance of getting a stable FreeBSD DomU? Is this already fixed somewhere? ___________________________________________...

Im intending use Ext3 file system in my web farm. Im using RedHat 6.2 (kernel 2.2.16-3) and Turbo Linux Cluster Server 6.0. I have NO SUCCESS in path my own kernel. I downloaded the following ext3 packages: ext3-0.0.2f.tar.gz (linux-2.2.16-3.kdb.diff , linux-2.2.16-3.ext3.diff ) e2fsprogs-1.20-0.WIP.i386.rpm e2fsprogs-1.20-0.WIP.src.rpm e2fsprogs-1.20-0ext3.i386.rpm e2fsprogs-devel-1.20-0.WIP.i386.rpm quota-2.00pre3-7a.i386.rpm quota-2.00pre3-7a.src.rpm I had applied the following steps: 1- I copied the linux-2.2.16-3.kdb.diff and linux-2...

hi guys i just partially upgrade centos 3.4 to centos 4(using apt-get) and im having a problem removing kdb 1.08-10.2, kbd 1.12-2 is already installed and im trying to remove kdb 1.08 through apt-get and rpm -e here's what happened when i use apt-get: # apt-get remove kbd#1.08-10.2 Reading Package Lists... Done Building Dependency Tree... Done The following packages will be REMOVED: kbd#1.08-10...

Hello, Now that kernel 2.2.20 is out with security fixes, I'd be interested in using it with ext3. The latest patch for 2.2.19, 0.0.7a, applies with some offset (both with and without kdb), and even compiles (without kdb), but I scarcely know what I am doing so haven't tried it yet. Could people in the know enlighten me on that point? I guess there is little chance for another ext3 patch in the 2.2 series? Thanks in advance, Cedric Ware.

Hi, friends How to debug Xen? Sometimes, I am confused with sudden hardware restart or halt. I can not see any output to analyze the problems. Can you introduce some debug methods adopted in the Xen development? _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

...s at the serial console, nothing happens. Iam using minicom to connect to the serial port of xen machine. Once xen machine is booted i get the login prompt on the serial console. So i dont think there is any problem with the serial setup. My grub.conf is as below title Fedora Core (2.6.18.8-xen-kdb) root (hd0,5) kernel /boot/xen-3.2.0.debug.gz console=com1,vga com1=115200,8n1 module /boot/vmlinuz-2.6.18.8-xen.kdb ro root=LABEL=/1 rhgb quiet console=tty1 console=ttyS1,115200,8n1 module /boot/initrd-2.6.18.8-xen.img My actual purpose is to break into xen hypervi...

...xed the whole problem. If a file write is in progress when invalidate_buffers() is called, I get an oops: [[[LVM is in the process of calling PV_FLUSH ioctl => invalidate_buffers()]]] Attempt to refile free buffer Unable to handle kernel NULL pointer dereference at virtual address 00000000 <kdb stuff> refile_buffer cleanup_transaction log_do_checkpoint log_wait_for_space start_this_handle journal_start ext3_file_write do_readv_writev sys_write The oops is from "*(char *)0 = 0" added by the ext3 patch, but I take it that trying to refile a free buffer is fundamentally a bad...