[Qemu-devel] [PULL 5/6] kvm-all: Sync dirty-bitmap from kvm before kvm destroy the corresponding dirty_bitmap

[Paolo Bonzini]

From: zhanghailiang <zhang.zhanghaili...@huawei.com>

Sometimes, we destroy the dirty_bitmap in kvm_memory_slot before any sync action
occur, this bit in dirty_bitmap will be missed, and which will lead the 
corresponding
dirty pages to be missed in migration.

This usually happens when do migration during VM's Start-up or Reboot.

Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com>
[Use s->migration_log instead of exec.c's in_migration. - Paolo]
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
---
 kvm-all.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kvm-all.c b/kvm-all.c
index 335438a..dd44f8c 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -715,7 +715,7 @@ static void kvm_set_phys_mem(MemoryRegionSection *section, 
bool add)
 
         old = *mem;
 
-        if (mem->flags & KVM_MEM_LOG_DIRTY_PAGES) {
+        if ((mem->flags & KVM_MEM_LOG_DIRTY_PAGES) || s->migration_log) {
             kvm_physical_sync_dirty_bitmap(section);
         }
 
-- 
2.3.4