------- Comment From [email protected] 2021-04-20 02:40 EDT-------
IBM Bugzilla status->closed, Fix Released with hirsuite

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https://bugs.launchpad.net/bugs/1925030

Title:
  [21.04 FEAT] SCLP extended length SCCBs

Status in Ubuntu on IBM z Systems:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  Make use of SCLP's "extended-length-SCCB facility" for READ SCP INFO (FORCED) 
and READ CPU INFORMATION. The current limitation to 4k SCCB might cause issues 
for future machines with many CPUs.
  For such machines with ~240 CPUs the information for all CPUs cannot be 
provided within the response of READ CPU INFORMATION. To avoid this problem 
make use of extended length SCCBs.

  Available with kernel 5.10.
  Therefore upstream integrated with Ubuntu 21.04

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