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authorWaiman Long <longman@redhat.com>2018-07-17 17:59:27 -0400
committerPaolo Bonzini <pbonzini@redhat.com>2018-08-06 17:59:04 +0200
commit3553ae5690a84a5baae5baa329467b3df2d99f72 (patch)
tree336d0d26cfb9af7c6c0ef2c9ce7d835e2fcf1e7a /arch/x86/include
parent450917b654c12075bd2b07d1e375dfed1bc9ca1e (diff)
download96b-common-3553ae5690a84a5baae5baa329467b3df2d99f72.tar.gz
x86/kvm: Don't use pvqspinlock code if only 1 vCPU
On a VM with only 1 vCPU, the locking fast path will always be successful. In this case, there is no need to use the the PV qspinlock code which has higher overhead on the unlock side than the native qspinlock code. Signed-off-by: Waiman Long <longman@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include')
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