Re: [Xen-devel] [PATCH v4] xen: credit1: avoid boosting vCPUs being "just" migrated

2016-02-29 Thread George Dunlap
On 24/02/16 17:42, Dario Faggioli wrote: > Moving a vCPU to a different pCPU means offlining it and > then waking it up, on the new pCPU. Credit1 grants BOOST > priority to vCPUs that wakes up, with the aim of improving > I/O latency. The net effect of this all is that vCPUs get > boosted when migr

[Xen-devel] [PATCH v4] xen: credit1: avoid boosting vCPUs being "just" migrated

2016-02-24 Thread Dario Faggioli
Moving a vCPU to a different pCPU means offlining it and then waking it up, on the new pCPU. Credit1 grants BOOST priority to vCPUs that wakes up, with the aim of improving I/O latency. The net effect of this all is that vCPUs get boosted when migrating, which shouldn't happen. For instance, this