Folks, On Tue, Feb 13, 2018 at 09:05:39AM +0800, Wanpeng Li wrote: > This patchset introduces dedicated vCPUs(vCPU pinning, and there is no > vCPU over-commitment) hint KVM_HINTS_DEDICATED, it has two users now: > > 1) Waiman Long mentioned that: > > Generally speaking, unfair lock performs well for VMs with a small > number of vCPUs. Native qspinlock may perform better than pvqspinlock > if there is vCPU pinning and there is no vCPU over-commitment. > > 2) vCPUs are very unlikely to get preempted when they are the only task > running on a CPU. PV TLB flush is slower that the native flush in that > case. > > v3 -> v4: > * update feature bit document > v2 -> v3: > * a separate table for CPUID[0x40000001].EDX bits > * a new kvm_hint_has_feature macro > v1 -> v2: > * update to KVM_HINTS_DEDICATED Great to see this has finally moved forward! Thanks for picking it up Wanpeng. I would just request to next time at least reference the original thread and copy the original authors of the patch/idea. Thanks a lot. -- All the best, Eduardo Valentin
