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ram: Introduce migration_bitmap_test_and_reset_dirty()
It just test if the dirty bit is set, and clears it. Signed-off-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Orit Wasserman <owasserm@redhat.com>
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19
arch_init.c
19
arch_init.c
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@ -331,6 +331,19 @@ static int save_xbzrle_page(QEMUFile *f, uint8_t *current_data,
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static RAMBlock *last_block;
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static ram_addr_t last_offset;
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static inline bool migration_bitmap_test_and_reset_dirty(MemoryRegion *mr,
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ram_addr_t offset)
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{
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bool ret = memory_region_get_dirty(mr, offset, TARGET_PAGE_SIZE,
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DIRTY_MEMORY_MIGRATION);
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if (ret) {
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memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
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DIRTY_MEMORY_MIGRATION);
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}
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return ret;
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}
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static inline void migration_bitmap_set_dirty(MemoryRegion *mr, int length)
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{
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ram_addr_t addr;
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@ -364,14 +377,10 @@ static int ram_save_block(QEMUFile *f, bool last_stage)
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do {
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mr = block->mr;
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if (memory_region_get_dirty(mr, offset, TARGET_PAGE_SIZE,
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DIRTY_MEMORY_MIGRATION)) {
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if (migration_bitmap_test_and_reset_dirty(mr, offset)) {
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uint8_t *p;
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int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0;
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memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
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DIRTY_MEMORY_MIGRATION);
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p = memory_region_get_ram_ptr(mr) + offset;
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if (is_dup_page(p)) {
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