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由 Marcelo Tosatti 提交于
Block migration can submit multiple AIO reads for the same sector/chunk, but completion of such reads can happen out of order: migration guest - get_dirty(N) - aio_read(N) - clear_dirty(N) write(N) set_dirty(N) - get_dirty(N) - aio_read(N) If the first aio_read completes after the second, stale data will be migrated to the destination. Fix by not allowing multiple AIOs inflight for the same sector. Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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