linux-kernel - Re: intel_idle causing 3.0.8 system reboot (was: if nolapic not used then system reboots after loading first module (possibly first irq using module))

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Message-Id: <201111130854.56201.a.miskiewicz@gmail.com>
Date:	Sun, 13 Nov 2011 08:54:55 +0100
From:	Arkadiusz Miśkiewicz <a.miskiewicz@...il.com>
To:	Len Brown <lenb@...nel.org>
Cc:	linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: intel_idle causing 3.0.8 system reboot (was: if nolapic not used then system reboots after loading first module (possibly first irq using module))

On Sunday 13 of November 2011, Len Brown wrote:
> > intel_idle.max_cstate=2 also makes the problem go away.
> 
> Is the system running with BIOS SETUP defaults?

Tried also with "safe defaults (F8)" but that didn't help.

> Are there any BIOS SETUP options related to CPU idle states?

Yes, there are

"C state package limit setting" with values possible: Auto, C1, C3, C6, C7 
(set to "Auto" here)
"Intel EIST technology" -> Enabled
"C1E support" -> Enabled
"Intel C-STATE tech" -> Enabled
"C1 Auto Demotion" -> Enabled
"C3 Auto Demotion" -> Enabled

> please boot with intel_idle.max_cstate=0
> and send the output of these two commands:
> 
> dmesg |grep idle
> grep . /sys/devices/system/cpu/cpu0/cpuidle/*/*

[root@...ta ~]# dmesg |grep idle
[    0.000000] Command line: auto BOOT_IMAGE=pld3.0.8test ro root=812 
console=tty0 console=ttyS2,38400n81 panic=60 selinux=0 intel_idle.max_cstate=0
[    0.000000] Kernel command line: auto BOOT_IMAGE=pld3.0.8test ro root=812 
console=tty0 console=ttyS2,38400n81 panic=60 selinux=0 intel_idle.max_cstate=0
[    0.000000]  RCU dyntick-idle grace-period acceleration is enabled.
[    0.278494] using mwait in idle threads.
[    4.330321] intel_idle: disabled
[    5.794456] cpuidle: using governor ladder
[    5.806755] cpuidle: using governor menu
[root@...ta ~]# LC_ALL=C grep . /sys/devices/system/cpu/cpu0/cpuidle/*/*
grep: /sys/devices/system/cpu/cpu0/cpuidle/*/*: No such file or directory

There are only:
[root@...ta ~]# LC_ALL=C grep . /sys/devices/system/cpu/cpuidle/*
/sys/devices/system/cpu/cpuidle/current_driver:none
/sys/devices/system/cpu/cpuidle/current_governor_ro:menu

> 
> thanks,
> Len Brown, Intel Open Source Technology Center
> 
> >> # cat /proc/cpuinfo
> >> processor       : 0
> >> vendor_id       : GenuineIntel
> >> cpu family      : 6
> >> model           : 30
> >> model name      : Intel(R) Xeon(R) CPU           X3430  @ 2.40GHz
> >> stepping        : 5

-- 
Arkadiusz Miśkiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/
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