Messages in this thread | | | Date | Tue, 3 Oct 2006 17:18:21 -0700 | From | "Steven Truong" <> | Subject | kexec / kdump kernel panic |
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Hi, I have a dual Xeon 3.2 GHz with Cent OS 4.3 and this box is in a cluster. It keeps bailling out with kernel panic type of error and I can not determine for sure what type of kernel or hardware problem. I have tried to play with kexec and kdump with the hope to set up and capture the kernel dump to debug.
I have followed the instruction in linux-2.16.18 Documentation/kdump/kdump.txt closely but still have not been able to get it to work for loading the caputured kernel for panic kernel situation.
I have the system kernel with Linux 2.16.18 booted up and set with crashkernel=128M@16M. I compiled this system kernel with KEXEC, SYSFS, DEBUG_INFO and CRASH_DUMP enabled. When this box is up with this system kernel and can see that the total memory is 128 MB less than the physical memory.
For the crash/captured kernel, I had SMP disable and KEXEC, CRASH_DUMP, and VMCORE enabled. PHYSICAL_START=0x1000000.
I first tested with the following command and saw that the crash/captured kernel booted up the box without going through the BIOS initialization.
/usr/sbin/kexec -l /boot/vmlinux --initrd=/boot/initrd-2.6.18-kdump.img --args-linux --append="root=/dev/sda3 init 1"
However, when I tried to load the crash/captured kernel for kernel panic situation, I just got failed to load kernel /boot/vmlinux error message. I used the following command to load :
/usr/sbin/kexec -p /boot/vmlinux --initrd=/boot/initrd-2.6.18-kdump.img --args-linux --append="root=/dev/sda3 irqpoll init 1"
I did make sure that vmlinux is not a bzImage file by using this command
readelf -h /boot/vmlinux
and I was able to see the output of this command. If I used this one with bzImage file, I won't see anything. So I am pretty sure the kernel file vmlinux is ok.
I did strace the second command but did not gain any special knowledge here and no error message could be found in any log files.
I used kexec-tools-1.101 and kexec-tools-1.101-kdump10.patch. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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