Re: x86/mce: machine check warning during poweroff

["Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>]

On 01/14/2012 08:40 AM, Linus Torvalds wrote:

> On Fri, Jan 13, 2012 at 7:05 PM, Srivatsa S. Bhat
> <srivatsa.bhat@linux.vnet.ibm.com> wrote:
>>> On Fri, Jan 13, 2012 at 6:41 PM, Srivatsa S. Bhat
>>> <srivatsa.bhat@linux.vnet.ibm.com> wrote:
>>>
>>>> The patch below works perfectly for me - I tested multiple CPU hotplug
>>>> operations as well as multiple pm_test runs at core level. Please let me
>>>> know if this solves the suspend issue as well..
>>>
>>> Ok, I'll try, and I bet it does.
> 
> Yup, I can suspend and resume multiple times now.


Wow! Feels good to hear that, at last! :-)

By the way, in my excitement, while sending the patch I forgot to give
credits to the problem reporters with a "Reported-by". Hope that gets
resolved.

> 
>> I totally agree with you. Even I had set out to find out *exactly* what
>> was going wrong. After spending significant amount of time digging through
>> the code (unsuccessfully), this idea of zeroing out everything struck me
>> and it worked, as expected. Yes, it is definitely important to know the
>> exact issue so that we can fix the driver core and avoid other mishaps,
>> but I guess finding that out is not all that simple.. as of now I am
>> rather exhausted following those zillions of pointers continuously
>> for the past few hours.. ;-/
> 
> Fair enough. The many layers of clever indirection are really really
> nasty to follow, I agree.
> 


:-)
 
Regards,
Srivatsa S. Bhat
IBM Linux Technology Center