Setting as Invalid for linux, as this is not a linux bug. Marking as
Confirmed for makedumpfile, where there is a chance this might be fixed.
However, I disagree with checking for a specific module on a specific
architecture to decide crashkernel size.
crashkernel size is a suggestion. Users are supposed to test that kdump
works with the size they are supposed to configure. We may need to
document that.
** Also affects: makedumpfile (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Groovy)
Status: New => Invalid
** Changed in: linux (Ubuntu Focal)
Status: New => Invalid
** Changed in: makedumpfile (Ubuntu Groovy)
Status: New => Confirmed
** Changed in: makedumpfile (Ubuntu Focal)
Status: New => Confirmed
--
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:
Triaged
Status in linux package in Ubuntu:
Invalid
Status in makedumpfile package in Ubuntu:
Confirmed
Status in linux source package in Focal:
Invalid
Status in makedumpfile source package in Focal:
Confirmed
Status in linux source package in Groovy:
Invalid
Status in makedumpfile source package in Groovy:
Confirmed
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 : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
