Pausing all vcpus when reconfiguring something at run time is a big
overhead. Use rwlock to allow vcpu not accessing ressources being
reconfigured to continue running.
Signed-off-by: Julien Thierry <julien.thierry@xxxxxxx>
---
include/kvm/brlock.h | 11 -----------
include/kvm/kvm.h | 2 --
2 files changed, 13 deletions(-)
diff --git a/include/kvm/brlock.h b/include/kvm/brlock.h
index 1862210..7d81056 100644
--- a/include/kvm/brlock.h
+++ b/include/kvm/brlock.h
@@ -17,8 +17,6 @@
#define barrier() __asm__ __volatile__("": : :"memory")
#endif
-#ifdef KVM_BRLOCK_DEBUG
-
#include "kvm/rwsem.h"
#define br_read_lock(kvm) down_read(&(kvm)->brlock_sem);
@@ -27,13 +25,4 @@
#define br_write_lock(kvm) down_write(&(kvm)->brlock_sem);
#define br_write_unlock(kvm) up_write(&(kvm)->brlock_sem);
-#else
-
-#define br_read_lock(kvm) barrier()
-#define br_read_unlock(kvm) barrier()
-
-#define br_write_lock(kvm) kvm__pause(kvm)
-#define br_write_unlock(kvm) kvm__continue(kvm)
-#endif
-
#endif
diff --git a/include/kvm/kvm.h b/include/kvm/kvm.h
index 7a73818..2f1679e 100644
--- a/include/kvm/kvm.h
+++ b/include/kvm/kvm.h
@@ -82,9 +82,7 @@ struct kvm {
int vm_state;
-#ifdef KVM_BRLOCK_DEBUG
pthread_rwlock_t brlock_sem;
-#endif
};
void kvm__set_dir(const char *fmt, ...);
--
1.9.1
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