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33656af70230d5ccebe29e2f3bee38afe17db9b2
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: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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Read the documentation in qemu-doc.html. Fabrice Bellard.
Description
Original Xbox Emulator for Windows, macOS, and Linux (Active Development)
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GPL-2.0
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