Messages in this thread | | | Date | Fri, 13 Oct 2006 10:50:08 -0700 | From | "Steven Truong" <> | Subject | Re: kdump/kexec/crash on vmcore file |
| |
Hi, Vivek. Thank you very much for the tips. I went back to check my command to load the crash/capture kernel and found out that I loaded the wrong kernel. I then tried again with the correct kernel and now I was able to use crash to analyze the vmcore kdump file.
Thank you once again.
On 10/13/06, Vivek Goyal <vgoyal@in.ibm.com> wrote: > On Thu, Oct 12, 2006 at 02:50:33PM -0700, Steven Truong wrote: > > Hi, all. This is my first attempt to troubleshoot a kernel panic so I > > am quite newbie in this area. I have been able to obtain a kdump when > > my box had kernel panic. > > > > I set up Kdump and Kexec and then the captured/crash kernel to boot > > into Level 1 and then copy /proc/vmcore file to the disk for later > > analysis. However, after the server booted back to Level 3 and I > > utilized the crash command to analyzed the vmcore file. I got error > > message: > > > > ./crash /boot/vmlinux ../vmcore.test > > > > > > crash: read error: kernel virtual address: ffffffff8123d1e0 type: > > "kernel_config_data" > > WARNING: cannot read kernel_config_data > > crash: read error: kernel virtual address: ffffffff813b5180 type: "xtime" > > > > Hi Steven, > > which vmlinux are you using for analysis? First kernel's vmlinux or > second kernel's vmlinux. You should be using first kernel's vmlinux. > > crash is trying to read some symbols from the core file and crash thinks > that virtual address for kernel_config_data is ffffffff8123d1e0. I think > this is too high a address. I guess this will be the address if you > compile your kernel for physical address 16MB. So my first guess is that > you are using second kernel's vmlinux for analysis. > > Which kernel version and kexec-tools version are you using? > > I am also copying the mail to crash-utility mailing list where folks > keep a watch on crash related issues. > > Thanks > Vivek > - 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/
| |