Messages in this thread Patch in this message | | | From | Gleb Natapov <> | Subject | [PATCH 2/2] KVM: make guest mode entry to be rcu quiescent state | Date | Thu, 28 Apr 2011 12:52:03 +0300 |
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KVM does not hold any references to rcu protected data when it switches CPU into a guest mode. In fact switching to a guest mode is very similar to exiting to userspase from rcu point of view. In addition CPU may stay in a guest mode for quite a long time (up to one time slice). Lets treat guest mode as quiescent state, just like we do with user-mode execution.
Signed-off-by: Gleb Natapov <gleb@redhat.com> --- include/linux/kvm_host.h | 1 + 1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 0bc3d37..a347bce 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -593,6 +593,7 @@ static inline void kvm_guest_enter(void) { account_system_vtime(current); current->flags |= PF_VCPU; + rcu_note_context_switch(smp_processor_id()); } static inline void kvm_guest_exit(void) -- 1.7.2.3
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