On 04/18/2014 09:18 AM, Konrad Rzeszutek Wilk wrote:
> On Thu, Apr 17, 2014 at 09:48:36PM -0400, Waiman Long wrote:
>> On 04/17/2014 01:23 PM, Konrad Rzeszutek Wilk wrote:
>>> On Thu, Apr 17, 2014 at 11:03:52AM -0400, Waiman Long wrote:
>>>> v8->v9:
>>>>    - Integrate PeterZ's version of the queue spinlock patch with some
>>>>      modification:
>>>>      http://lkml.kernel.org/r/20140310154236.038181843@infradead.org
>>>>    - Break the more complex patches into smaller ones to ease review effort.
>>>>    - Fix a racing condition in the PV qspinlock code.
>>> I am not seeing anything mentioning that the overcommit scenario
>>> for KVM and Xen had been fixed. Or was the 'racing condition' said
>>> issue?
>>>
>>> Thanks.
>> The hanging is caused by a racing condition which should be fixed in
>> the v9 patch. Please let me know if you are still seeing it.
> OK, is there a git tree with these patches to easily slurp them up?
>

I am sorry that I don't have a public git tree with the qspinlock 
patches. However, I have made a consolidated patch (patches 1-19) in the 
attached file. Hopefully that will make it easier to apply the patch. 
BTW, it has to be on top of 3.15-rc1 or later version. This may also be 
a conflict in the xen/spinlock.c file.

-Longman