Created attachment 1202714 [details]
Description of problem:
Kdump captures a extremely large vmcore after a crash, which is several GBs.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.echo c > /proc/sysrq-trigger
A vmcore file of several GBs
A vmcore file whose size is under 100M
Fedora 25 kernel enabled kaslr by default so kdump default config does not work, Pratyush has patches to fix it, it will be likely accepted by upstream soon.
So we should fix it in F25 compose.
kexec-tools-2.0.13-7.fc25 has been pushed to the Fedora 25 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2016-7a0e28b12e
kexec-tools-2.0.13-7.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.