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

From: Waiman Long
Date: Thu Apr 17 2014 - 21:48:54 EST


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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