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(parent: 5ba812b) | patch
x86/kvm: Don't use pv tlb/ipi/sched_yield if on 1 vCPU
authorWanpeng Li <wanpengli@tencent.com>
Fri, 18 Feb 2022 08:10:38 +0000 (00:10 -0800)
committerPaolo Bonzini <pbonzini@redhat.com>
Fri, 18 Feb 2022 08:36:24 +0000 (03:36 -0500)
commitfa09a61f46976732f712b3d3a39e03c523543b3c
tree43b000e294ca5e44e2cb5f440515c1a8c8cbeee3tree | snapshot
parent5ba812b983f952761adbb1c33a2d5844c76cbadbcommit | diff
x86/kvm: Don't use pv tlb/ipi/sched_yield if on 1 vCPU

Inspired by commit fe492a5cdd6 (x86/kvm: Don't use pvqspinlock code if
only 1 vCPU), on a VM with only 1 vCPU, there is no need to enable
pv tlb/ipi/sched_yield and we can save the memory for __pv_cpu_mask.

Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1645171838-2855-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kernel/kvm.c diff | blob | history
Linux Kernel Source Tree.