Re: [Xen-devel] [PATCH 1/1] sched/cputime: do not decrease steal time after live migration on xen

2017-10-10 Thread Rik van Riel
On Tue, 2017-10-10 at 14:48 +0200, Peter Zijlstra wrote: > On Tue, Oct 10, 2017 at 02:42:01PM +0200, Stanislaw Gruszka wrote: > > > > + u64 steal, steal_time; > > > > + s64 steal_delta; > > > > + > > > > + steal_time = > > > >

Re: [Xen-devel] [PATCH v15 16/16] unfair qspinlock: a queue based unfair lock

2015-04-09 Thread Rik van Riel
On 04/09/2015 03:01 AM, Peter Zijlstra wrote: On Wed, Apr 08, 2015 at 02:32:19PM -0400, Waiman Long wrote: For a virtual guest with the qspinlock patch, a simple unfair byte lock will be used if PV spinlock is not configured in or the hypervisor isn't either KVM or Xen. The byte lock works

Re: [Xen-devel] [PATCH v15 16/16] unfair qspinlock: a queue based unfair lock

2015-04-09 Thread Rik van Riel
On 04/09/2015 10:13 AM, Peter Zijlstra wrote: On Thu, Apr 09, 2015 at 09:16:24AM -0400, Rik van Riel wrote: On 04/09/2015 03:01 AM, Peter Zijlstra wrote: On Wed, Apr 08, 2015 at 02:32:19PM -0400, Waiman Long wrote: For a virtual guest with the qspinlock patch, a simple unfair byte lock