Bug 1432 - Intel: Backport Intel_idle fix for SPR
Summary: Intel: Backport Intel_idle fix for SPR
Status: RESOLVED FIXED
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: drivers (show other bugs) drivers
Version: unspecified
Hardware: x86_64 Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: xunlei
QA Contact: shuming
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-06-10 16:52 UTC by jiayingbao
Modified: 2022-08-03 15:45 UTC (History)
1 user (show)

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Description jiayingbao intel_group 2022-06-10 16:52:37 UTC 
Description of problem:
there is bug fix on upstream for SPR C6 and the 'preferred_cstates' module parameter

Version-Release number of selected component (if applicable):


How reproducible:
Tested on a 2-socket SPR system. I verified the following combinations:
 * C1E promotion enabled and disabled in BIOS.
 * Booted with and without the 'intel_idle.preferred_cstates=4' kernel
   argument.
In all 4 cases C1E promotion was correctly set on all CPUs.


Steps to Reproduce:
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Actual results:


Expected results:


Additional info:
Comment 1 jiayingbao intel_group 2022-08-03 15:45:22 UTC 
patch merged