Messages in this thread | | | Date | Thu, 17 Apr 2014 21:50:54 -0400 | From | Waiman Long <> | Subject | Re: [PATCH v9 00/19] qspinlock: a 4-byte queue spinlock with PV support |
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On 04/17/2014 01:40 PM, Raghavendra K T wrote: > On 04/17/2014 10:53 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? > > Saw changes in patch 18 that fixes for kvm (19 for xen). 'll > test the series and confirm. >
The main fix is by replacing some barrier() with smp_mb(). The additional changes in kvm and xen are not the main one.
-Longman
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