[PATCH RESEND v2 0/3] KVM: Yield to IPI target if necessary

2019-05-28 Thread Wanpeng Li
The idea is from Xen, when sending a call-function IPI-many to vCPUs, yield if any of the IPI target vCPUs was preempted. 17% performance increase of ebizzy benchmark can be observed in an over-subscribe environment. (w/ kvm-pv-tlb disabled, testing TLB flush call-function IPI-many since call-f

[PATCH RESEND v2 0/3] KVM: Yield to IPI target if necessary

2019-05-28 Thread Wanpeng Li
The idea is from Xen, when sending a call-function IPI-many to vCPUs, yield if any of the IPI target vCPUs was preempted. 17% performance increase of ebizzy benchmark can be observed in an over-subscribe environment. (w/ kvm-pv-tlb disabled, testing TLB flush call-function IPI-many since call-f