For the record, Guilherme and I concluded that when dumping a kexec kernel, there may be leftover memory from the previous kernel which causes the dump to be corrupted. That was after I ran some tests that showed that when booting a 3.13.0-137, kexecing a 3.13.0-85, then dumping, the dump would contain 3.13.0-137 versions. And Guilherme confirmed that kexec was used to boot kernels once in a while during the tests.
As the test results from Guilherme include boots with kexec and without it, and the results were not consistent, the suggestion is that multiple dumps be taken only when cold booting a 3.13 kernel, using makedumpfile shipped from trusty-updates. And that those be verified with crash. Cascardo. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1785686 Title: makedumpfile not able to use compression in trusty kernel 3.13 (fallback to 'cp') To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1785686/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
