From 3a08a8f9f0936e182d387afd85fdc5d303381521 Mon Sep 17 00:00:00 2001
From: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Date: Mon, 4 Mar 2013 23:32:07 +0530
Subject: kvm: Record the preemption status of vcpus using preempt notifiers

Note that we mark as preempted only when vcpu's task state was
Running during preemption.

Thanks Jiannan, Avi for preemption notifier ideas. Thanks Gleb, PeterZ
for their precious suggestions. Thanks Srikar for an idea on avoiding
rcu lock while checking task state that improved overcommit numbers.

Reviewed-by: Chegu Vinod <chegu_vinod@hp.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
---
 include/linux/kvm_host.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/linux/kvm_host.h')

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 9fa13ebc338..0f4941a9c9c 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -253,6 +253,7 @@ struct kvm_vcpu {
 		bool dy_eligible;
 	} spin_loop;
 #endif
+	bool preempted;
 	struct kvm_vcpu_arch arch;
 };
 
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