11/12/2007 10:16 AM, Thomas Renninger wrote/a écrit:
On Sun, 2007-11-11 at 20:10 +0100, Eric Piel wrote:
Hello,
I've tried kernel 2.6.24-rc2 and I have a problem with the new option
for setting up the cpufreq ondemand governor as default: a kernel panic
happens early at boot time. If I boot first with performance governor
and later change to ondemand, everything is fine (as usual).
This seems related to the delayed_workqueue. The kernel panic message
finishes by:
EIP: [<c012aa60>] wq_per_cpu+0x0/0x10 SS:ESP 0068:c191be58
Kernel panic - not syncing: Attempted to kill init!
A picture of the whole message is available here:
http://pieleric.free.fr/unorder/1162-ondemand-panic.jpg
My computer is a x86 using speedstep-ich, and you can find the full
.config leading to the panic attached.
Does anyone has any idea was it going wrong?
Does it work if you compile speedstep-ich as a module?
If you load it, ondemand governor should still be set up automatically.
If this works, could it be that the kernel does not like that
queue_delayed_work_on is called that early?
Yes, it works if I compile speedstep-ich as module. I've put the module
in initramfs and as soon it is loaded, the ondemand governor is selected
and works.
However, do you think it's ok to prevent cpufreq drivers to be built-in
if ondemand governor is selected as default? Another way would be to
reorganise the initialisation code so that workqueue is initialised
before the cpufreq framework is started, do you think it's possible?
See you,
Eric
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