Hi Dave, I updated the makedumpfile utility from 1.3.5 to 1.3.7 . When I run the below command makedumpfile -c -d 31 -x vmlinux_temp vmcore vmcore-new The kernel version is not supported. The created dumpfile may be incomplete. check_release: Can't get the kernel version. makedumpfile Failed. Is there any other way to extract the ELF style vmcore file from the kdump compressed format. Please guide me. Regards Shashidhara -----Original Message----- From: crash-utility-bounces@xxxxxxxxxx [mailto:crash-utility-bounces@xxxxxxxxxx] On Behalf Of Dave Anderson Sent: Thursday, June 16, 2011 7:30 PM To: Discussion list for crash utility usage,maintenance and development Subject: Re: Unable to switch stack frames while using crash ----- Original Message ----- > Hi, > > Thank you Dave for your time and help. > > As suggested, I will update my crash utility first and then go about > analyzing the dump. > > >>> I believe that something like this might work?: > > >>> $ makedumpfile -c -d 31 -x vmlinux_temp vmcore-old vmcore-new > > I tried to use the command you suggested " makedumpfile -c -d 31 -x > vmlinux_temp vmcore vmcore-new " . I got an error message " The kernel > version is not supported.The created dumpfile may be incomplete. > check_release: Can't get the kernel version" > > Should I update makedumpfile utility as well? Or just updating crash > will do? That's a makedumpfile issue -- the message comes from here in makedumpfile.c: if ((version < OLDEST_VERSION) || (LATEST_VERSION < version)) { MSG("The kernel version is not supported.\n"); MSG("The created dumpfile may be incomplete.\n"); } where, at least in the RHEL6 version of makedumpfile (1.3.5), this is the range: #define OLDEST_VERSION KERNEL_VERSION(2, 6, 15)/* linux-2.6.15 */ #define LATEST_VERSION KERNEL_VERSION(2, 6, 32)/* linux-2.6.32 */ The upstream version of makedumpfile is now 1.3.7, which bumps LATEST_VERSION: #define LATEST_VERSION KERNEL_VERSION(2, 6, 36)/* linux-2.6.36 */ But it's a warning message, and your vmcore-new may still be usable. Dave -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility Information transmitted by this e-mail is proprietary to MphasiS, its associated companies and/ or its customers and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If you are not the intended recipient or it appears that this mail has been forwarded to you without proper authority, you are notified that any use or dissemination of this information in any manner is strictly prohibited. In such cases, please notify us immediately at mailmaster@xxxxxxxxxxx and delete this mail from your records. -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
