2018-03-06 22:39 GMT+08:00 Eduardo Valentin <edu...@amazon.com>: > 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 for the original idea, Eduardo! Regards, Wanpeng Li