On Sat, 18 Sep 2010, Tom Chen wrote:
> Hello,
>
> One of my x4270 with snv143 OS always panic after reboot. See the
> log below. What is this panic? it seems an error in power
> management. However, the other x4270 never has this panic. It is
> very strange. Is this a bad setup in this x86 machine's BIOS or one
> device driver not good? how do I disable pm?
>
> I failed to make a core dump since recent Solaris Express release
> apparently does not enable creation of core dump when panic happens.
> How do I enable?
>
> Tom
>
To start, I would like to get a dump, as various values will be of
use in determining a solution, but this problem appears to be the
result of releasing the lock after setting CPU's to their max power
setting. Setting this level should not have occured withough first
acquiring the lock, so there is either a path where it isn't acquired,
or there is a path where it is released more than once (a debug kernel
would likely have tripped on an ASSERT). As another machine of the
same architecture is not doing this, the trigger is something to do
with a difference in OS (are they both running the same release?), or
some difference in settings between the two (does the failing machine
run from the CD or a previous release?).
In any account, I see this as being a bug in some part of the CPU
power management path, and we desire a dump to check it out further.
The messages file, though, does indicate that a dump was taken, but it
is possible that it wasn't extracted because an extraction location
was not specified or doesn't exist. Use dumpadm(1m) to change or view
the settings. Note that the directory that is defined by 'Savecore
directory' must also exist. You can also extract this dump if you
have a different BE that will allow the machine to boot.
Send me whatever you might be able to extract and I will see about
getting a bug filed. Also, I don't see offhand that there will be a
way to disable PM in the OS (if this is an always-panic-at-boot
problem), so you might have to check BIOS settings for CPU power
management settings to get the machine to stop panicing (check the
difference in BIOS PM settings between the machines).
Cheers!
---- Randy
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