[21.04 FEAT] SCLP extended length SCCBs

Bug #1925030 reported by bugproxy
12
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Ubuntu on IBM z Systems
Fix Released
High
Unassigned
linux (Ubuntu)
Fix Released
High
Skipper Bug Screeners

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

bugproxy (bugproxy)
tags: added: architecture-s39064 bugnameltc-189498 severity-high targetmilestone-inin2104
Changed in ubuntu:
assignee: nobody → Skipper Bug Screeners (skipper-screen-team)
affects: ubuntu → linux (Ubuntu)
Revision history for this message
Frank Heimes (fheimes) wrote :

This was more added for the reason of completeness,
since it became upstream accepted with 5.10 and we are on final kernel target level 5.11,
hence I can be set to Fix Released right away.

Changed in linux (Ubuntu):
importance: Undecided → High
Changed in ubuntu-z-systems:
importance: Undecided → High
Changed in linux (Ubuntu):
status: New → Fix Released
Changed in ubuntu-z-systems:
status: New → Fix Released
information type: Private → Public
Revision history for this message
bugproxy (bugproxy) wrote : Comment bridged from LTC Bugzilla

------- Comment From <email address hidden> 2021-04-20 02:40 EDT-------
IBM Bugzilla status->closed, Fix Released with hirsuite

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