Add virtio-balloon support

This adds a VirtIO based balloon driver.  It uses madvise() to actually balloon
the memory when possible.

Until 2.6.27, KVM forced memory pinning so we must disable ballooning unless the
kernel actually supports it when using KVM.  It's always safe when using TCG.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5874 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 3 insertions, 0 deletions

diff --git a/kvm.h b/kvm.h
index fb952a3fb..ec0083f7e 100644
--- a/kvm.h
+++ b/kvm.h
@@ -42,6 +42,9 @@ void kvm_physical_sync_dirty_bitmap(target_phys_addr_t start_addr, target_phys_a
 
 int kvm_log_start(target_phys_addr_t phys_addr, target_phys_addr_t len);
 int kvm_log_stop(target_phys_addr_t phys_addr, target_phys_addr_t len);
+
+int kvm_has_sync_mmu(void);
+
 /* internal API */
 
 struct KVMState;