------- Comment From mihaj...@de.ibm.com 2020-11-13 04:03 EDT------- This is a setup without crypto cards (Secure Execution guests don't support passthrough yet). I think that we can live with the new kdump default settings, as I wouldn't want to suggest putting half of the memory away for kdump on small VMs. The recommendation should be to use pbkdf2 for machines < 4GB without crypto cards. Ideally, the tools would emit a warning when configuring the command line. Alternatively, this could be documented in the Installation Guide.
-- 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/1877533 Title: [20.10 FEAT] Increase the crashkernel setting if the root volume is luks2-encrypted Status in Ubuntu on IBM z Systems: In Progress Status in linux package in Ubuntu: Invalid Status in makedumpfile package in Ubuntu: In Progress Status in linux source package in Focal: Invalid Status in makedumpfile source package in Focal: In Progress Status in linux source package in Groovy: Invalid Status in makedumpfile source package in Groovy: In Progress Bug description: Description: In case the volume containing the root filesystem is encrypted using LUKS2 the memory used while unlocking the volume may exceed the size allocated to the kdump kernel. This will lead to a failure while processing kdump and the dump file will not be stored. Unfortunately, this condition may not be detected by a client before a problem occurs. The request is to have the kdump package installation script check for LUKS2 encryption (more precisely for Argon2i PBKDF, which is the root cause of the high memory usage). If the condition is met, the installation procedure should increase the crashkernel parameter to a higher value (>=512M)or issue a warning, if the system memory is insufficient to reserve enough crashkernel memory. Business Case: Pervasive Encryption and Secure Execution require encryption of the filesystems in order to keep customer data secure at all times. With the increasing usage of these technologies, the number of kdump will rise too, typically at inconvenient times, when the kdump is triggered due to a real customer issue. With the suggested change, the number of customer complaints and effort to handle them will be reduced. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1877533/+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
