Bug 20032

Summary: 2.6.36-rc7 continuos kernel panics in cpu_idle (and intel_idle)
Product: Power Management Reporter: Maciej Rutecki (maciej.rutecki)
Component: cpuidleAssignee: power-management_cpuidle (power-management_cpuidle)
Status: CLOSED UNREPRODUCIBLE    
Severity: normal CC: lenb, maciej.rutecki, patrizio.bassi, rjw
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.36-rc7 Tree: Mainline
Regression: Yes
Bug Depends on:    
Bug Blocks: 16444    

Description Maciej Rutecki 2010-10-10 17:54:36 UTC
Subject    : 2.6.36-rc7 continuos kernel panics due to of cpu_idle (and cpu_intel_idle)
Submitter  : Patrizio Bassi <patrizio.bassi@gmail.com>
Date       : 2010-10-08 18:23
Message-ID : AANLkTi=2irM5tM2rNC5wHVV=Nw4cs_CK59pvXDD+Y5Dz@mail.gmail.com
References : http://marc.info/?l=linux-kernel&m=128656222919323&w=2

This entry is being used for tracking a regression from 2.6.35.  Please don't
close it until the problem is fixed in the mainline.
Comment 1 Len Brown 2010-10-19 03:46:24 UTC
Do the issues go away when you boot with "idle=poll"?
Comment 2 Patrizio Bassi 2010-10-19 08:11:11 UTC
After bumping to -rc8 with cpu_idle but without cpu_idle_intel compiled i can't reproduce the issue anymore.
It's really strange because i could not see any commit related to a similar issue.

I'll wait 2.6.36 vanilla to be out to test again with the intel module too.
Comment 3 Len Brown 2010-10-20 16:34:58 UTC
please re-open if you can reproduce this with 2.6.36-rc8 or later
Comment 4 Patrizio Bassi 2010-10-22 08:57:45 UTC
i confirm 2.6.36 final with 
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_ARCH_HAS_DEFAULT_IDLE=y
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y
CONFIG_INTEL_IDLE=y

looks stable now.

i will reopen if any issues happen
Comment 5 Len Brown 2010-10-24 04:11:41 UTC
Thanks for confirming 2.6.36 is working, Patrizio.
Please let us know if you see any troubles with the release,
no matter the .config