Oh yeah, it would be awesome to set such message...but I'm not sure how we can do it! If we know beforehand that the reserved memory amount won't work for your system, to show the message..why we don't just fix it?
The problem is that this is a policy, there is no technical mechanism (currently) that foresees that a quantity of RAM equals X is required for your system in order kdump to work. We have the heuristic (aka sets crashkernel to 192M), which is expected to work on the majority of machines. Hence, the recommendation for kdump users is to install the package and perform a dummy kdump, as you did! If it fails, go ahead and fine tune that. With the estimator I've pointed you in the last comment, things should improve, having a mechanism that will suggest a proper amount, pre-calculated on boot time. But until we get that merged, this situation is not ideal and will remain like this - I understand it's not the best, if you have a technical suggestion on how we could improve it, it's highly appreciated =) Cheers, Guilherme -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to makedumpfile in Ubuntu. https://bugs.launchpad.net/bugs/1931779 Title: kdump just hung out of the box Status in makedumpfile package in Ubuntu: Fix Released Bug description: I tried installing kdump-tools (1.6.7-1ubuntu2.2) on my up to date 20.04 system, installed specifically to try reproducing a bug. But when I tried, after kdump-config status reported "ready to dump" on reboot, echo 'c' | sudo tee /proc/sysrq-trigger, it printed the panic to console and then just hung forever. After some blind guessing and twiddling both variables, I found that crashkernel=512M-:256M works on this particular setup. (MS7850 motherboard, i5-4670 CPU, 5.4.0-42-generic kernel) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1931779/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
