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由 Avi Kivity 提交于
When a range is being unmapped, ask accelerators (e.g. kvm) to synchronize the dirty bitmap to avoid losing information forever. Fixes grub2 screen update. Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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