Description of problem: The current version of the crash utility, in F9, does not appear to support crash dumps from the latest available F9 2.6.27 kernel. Version-Release number of selected component (if applicable): crash-4.0-6.0.5.x86_64 How reproducible: Always Steps to Reproduce: 1. Install latest crash and F9 kernel build, 2.6.27.7-53.fc9.x86_64. Install the corresponding debuginfo rpm, etc... 2. Install kexec-tools, set it up, etc.. 3. Generate a succesful crash dump via altsysrq 4. Try to start crash: crash [vmlinux path] [vmcore path] Actual results: Error message: crash: cannot resolve: "end_pfn" Expected results: A useful debug session Additional info: The following thread suggests that this is a known issue in the version of crash not supporting the 2.6.27 kernel. This thread appears to include the necessary patch: http://www.mail-archive.com/crash-utility@redhat.com/msg01214.html
> The following thread suggests that this is a known issue in the version of > crash not supporting the 2.6.27 kernel. This thread appears to include the > necessary patch: > > http://www.mail-archive.com/crash-utility@redhat.com/msg01214.html That's correct -- which resulted in this upstream change in 4.0-7.2: http://people.redhat.com/anderson/crash.changelog.html#4_0_7_2 4.0-7.2 - Fix for initialization-time failure when running against 2.6.27 x86_64 kernels, which indicate "crash: cannot resolve: end_pfn". The patch sets the new 2.6.27 x86_64 PAGE_OFFSET value, handles the change in the x86_64 "_cpu_pda" variable declaration, and distinguishes paravirtual "pv_ops" kernels from traditional xen kernels. (oomichi.nec.co.jp, anderson) > Version-Release number of selected component (if applicable): > > crash-4.0-6.0.5.x86_64 I don't update existing Fedora versions of crash given that they constantly update their kernel versions, so it's a losing battle. Every so often I update the "devel" branch, and the most recent one is later than the one you reference: build: dist-f10,devel:crash-4.0-7 http://koji.fedoraproject.org/koji/buildinfo?buildID=56268 But now that one is also obsolete. When I get around to it, I'll update the devel branch to the latest (at the time) version. In any case, as I tell all Fedora users, just download the latest from: http://people.redhat.com/anderson Thanks, Dave
Actually I did try rebuilding the latest crash from the F10 branch. I did try to rebuild 4.0-7, but that version still failed to read the crash file. 4.0-7 is dated July 15th, while that mailing list message is from September. Rebuilding your 4.0-7.5 snapshot resulted in success opening the same kernel dump. So, it looks like F10's crash indeed requires an update.
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