commit bd3220870f677d5b08f59d7e786ac18bde1c1b7c
author aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> Thu Dec 04 20:33:06 2008 +0000
committer aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162> Thu Dec 04 20:33:06 2008 +0000
tree 2f790c4ead1b6829a8433b37ba95e9b632d5f45e
parent df751fa8bfed4408ca091a7badd75c5ab80f71de

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

monitor.c

diff --git a/monitor.c b/monitor.c
index a928c3e..f142a87 100644
--- a/monitor.c
+++ b/monitor.c
@@ -1402,7 +1402,9 @@
     ram_addr_t actual;
 
     actual = qemu_balloon_status();
-    if (actual == 0)
+    if (kvm_enabled() && !kvm_has_sync_mmu())
+        term_printf("Using KVM without synchronous MMU, ballooning disabled\n");
+    else if (actual == 0)
         term_printf("Ballooning not activated in VM\n");
     else
         term_printf("balloon: actual=%d\n", (int)(actual >> 20));