Commit 69268cde authored by Juan Quintela's avatar Juan Quintela
Browse files

ram: Introduce migration_bitmap_test_and_reset_dirty()

It just test if the dirty bit is set, and clears it.
Signed-off-by: default avatarJuan Quintela <>
Reviewed-by: default avatarPaolo Bonzini <>
Reviewed-by: default avatarOrit Wasserman <>
parent e44d26c8
......@@ -331,6 +331,19 @@ static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
static RAMBlock *last_block;
static ram_addr_t last_offset;
static inline bool migration_bitmap_test_and_reset_dirty(MemoryRegion *mr,
ram_addr_t offset)
bool ret = memory_region_get_dirty(mr, offset, TARGET_PAGE_SIZE,
if (ret) {
memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
return ret;
static inline void migration_bitmap_set_dirty(MemoryRegion *mr, int length)
ram_addr_t addr;
......@@ -364,14 +377,10 @@ static int ram_save_block(QEMUFile *f, bool last_stage)
do {
mr = block->mr;
if (memory_region_get_dirty(mr, offset, TARGET_PAGE_SIZE,
if (migration_bitmap_test_and_reset_dirty(mr, offset)) {
uint8_t *p;
int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0;
memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
p = memory_region_get_ram_ptr(mr) + offset;
if (is_dup_page(p)) {
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