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authorXiao Guangrong <xiaoguangrong@cn.fujitsu.com>2010-11-01 10:01:28 +0100
committerAvi Kivity <avi@redhat.com>2011-01-12 10:29:00 +0100
commite6d53e3b0db7ae3641f01a2b2af1470fda86d10c (patch)
tree95b94e3caa16222379ef708ed6a073ddbc95a0a8 /virt/kvm
parentKVM: fix searching async gfn in kvm_async_pf_gfn_slot (diff)
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KVM: avoid unnecessary wait for a async pf
In current code, it checks async pf completion out of the wait context, like this: if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && !vcpu->arch.apf.halted) r = vcpu_enter_guest(vcpu); else { ...... kvm_vcpu_block(vcpu) ^- waiting until 'async_pf.done' is not empty } kvm_check_async_pf_completion(vcpu) ^- delete list from async_pf.done So, if we check aysnc pf completion first, it can be blocked at kvm_vcpu_block Fixed by mark the vcpu is unhalted in kvm_check_async_pf_completion() path Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Acked-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'virt/kvm')
0 files changed, 0 insertions, 0 deletions