Ubuntu
linux package

  1. Disco (19.04)
  2. Bug #1848492
  3. Comment #0

Comment 0 for bug 1848492

Revision history for this message
bugproxy (bugproxy) wrote : Change Config Option "CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y" -> "n"

The Ubuntu kernel configuration contains CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE=y for s390.
This causes all standby memory configured for an LPAR to be used at IPL time.

Note that this is definetaly not what a user wants on s390.
The normal process is: define a certain amount of "base" memory which the system should use when IPL'ed, and define also a certain amount of "standby" memory which can be (also only partially) be additionaly used when necessary.
Also note that it is *not* possible to add additional memory to a runnung system, besides the amount of memory specified as "standby".

Therefore please change the kernel config option CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE to "n" for s390.