Re: [PATCH v9 00/19] qspinlock: a 4-byte queue spinlock with PV support

[Waiman Long]

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@xxxxxxxxxxxxx
> >    - 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.

-Longman
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