------- Comment From michael.holz...@de.ibm.com 2016-03-31 12:50 EDT------- (In reply to comment #11) > I do not want to increase it beyond 128MB by default, as this amount of > memory is reserved by default on all installations big or small. And there > will always be newer kernel (that reserves more memory) or more devices that > require higher values.
Ok, if we go with the 128M default our current assumption is that on all LPARs kdump for Ubuntu will fail. I am not sure how many customers are aware of the fact that they have to manually tune the kdump settings. Therefore what about some documentation like the following: Depending on your system setup it can be necessary to increase the default setting of the "crashkernel=" kernel parameter. It is recommended to test the kdump setup with "echo c > /proc/sysrq-trigger". If the crashkernel value is not high enough, kdump will crash with out-of-memory error messages. You can see the message on the operating system messages. In case kdump does not work you have to increase the value in /etc/zipl.conf. Do you already have a similar documentation already available? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1564475 Title: 128M is not enough for kdump on s390 LPARs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/makedumpfile/+bug/1564475/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
