[Qemu-devel] [PATCH] kvm: flush the dirty log when unregistering a slot

[Avi Kivity]

Otherwise, the dirty log information is lost in the kernel forever.

Fixes opensuse-12.1 boot screen, which changes the vga windows rapidly.

Signed-off-by: Avi Kivity <address@hidden>
---

This patch gives me a deja vu - I'm sure I've fixed exactly the same issue
before.

Please test.

 kvm-all.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kvm-all.c b/kvm-all.c
index 3174f42..2cc4562 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -566,6 +566,10 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, 
bool add)
 
         old = *mem;
 
+        if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
+            kvm_physical_sync_dirty_bitmap(section);
+        }
+
         /* unregister the overlapping slot */
         mem->memory_size = 0;
         err = kvm_set_user_memory_region(s, mem);
-- 
1.7.7.1