Public bug reported:
Description: kernel: s390/cpum_cf,perf: change DFLT_CCERROR counter name
Symptom: Counter name CCERROR is misleading.
Problem: Change the counter name DLFT_CCERROR to DLFT_CCFINISH on
IBM z15. This counter counts completed DEFLATE instructions
with exit code 0, 1 or 2. Since exit code 0 means success
and exit code 1 or 2 indicate errors, change the counter
name to avoid confusion. This counter is incremented each
time the DEFLATE instruction completed regardless if an
error was detected or not.
Solution: Rename s390 z15 counter named DFLT_CCERROR to DFLT_CCFINISH
Reproduction: Command # ls /sys/devices/cpum_cf/events/DFLT_CCERROR
currently succeeds. After this patch has been applied the
command does not work anymore. The file does not exist
anymore. Use command
# ls /sys/devices/cpum_cf/events/DFLT_CCFINISH
instead.
Upstream-ID: 5ce1a24dd98c00a57a8fa13660648abf7e08e3ef
Component: kernel 5.8
Will be integrated into 20.10 by kernel 5.8 integration.
Backport available for 20.04.
To be checked for 18.04 and 16.04, update will be provided
Here is the backported patch.
The upstream commit id is 3d3af181d370069861a3be94608464e2ff3682e2
("s390/cpum_cf,perf: change DFLT_CCERROR counter name")
** Affects: ubuntu-z-systems
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Skipper Bug Screeners (skipper-screen-team)
Status: New
** Tags: architecture-s39064 bugnameltc-187544 severity-high
targetmilestone-inin2004
** Tags added: architecture-s39064 bugnameltc-187544 severity-high
targetmilestone-inin2004
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https://bugs.launchpad.net/bugs/1891454
Title:
[UBUNTU 20.04] kernel: s390/cpum_cf,perf: change DFLT_CCERROR counter
name
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