----- Original Message ----- > Hi Dave, > > Information update: I think I found the root cause. > > During the test in last week, I always use makedumpfile, use > /etc/kdump.conf as-is: > > core_collector makedumpfile -l --message-level 1 -d 31 > > And now I am suggested to dump without makedumpfile by using: > > core_collector cp > > I get big vmcore file of 3.5G, but crash 7.2.0++ can deal with it > without any error, whether with or without "nokaslr" kernel parameter. > > So it seems makedumpfile has problem, and if it does is, I am curious > about that there is no other people report this kind of issue, because > it seems easy to reproduce. > > -- > Sincerely, > Cao jin Issues with makedumpfile are typically discussed on the upstream kexec mailing list: http://lists.infradead.org/mailman/listinfo/kexec The makedumpfile command has a "LATEST_VERSION" that it supports in its makedumpfile.h file. In Fedora package kexec-tools-2.0.16-1.fc28, it is this: #define LATEST_VERSION KERNEL_VERSION(4, 11, 7)/* linux-4.11.7 */ So it is not surprising that running it on a 4.14 kernel does not work as hoped. Dave -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
