On 10/14/2015 09:43 AM, Daniel Wagner wrote:
> arch/arm/kvm/arm.c | 4 ++--
> arch/arm/kvm/psci.c | 4 ++--
> arch/powerpc/include/asm/kvm_host.h | 4 ++--
> arch/powerpc/kvm/book3s_hv.c| 23 +++
> arch/s390/include/asm/kvm_host.h
From: Marcelo Tosatti
The problem:
On -rt, an emulated LAPIC timer instances has the following path:
1) hard interrupt
2) ksoftirqd is scheduled
3) ksoftirqd wakes up vcpu thread
4) vcpu thread is scheduled
This extra context switch introduces unnecessary latency in the
LAPIC path for a KVM gu
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