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



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@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.
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

Attachment: qspinlock-consolidated-patches
Description: Text document

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