[Qemu-devel] [PATCH] savevm/loadvm/migrate: flush aio while pending BHs exist

[Uri Lublin]

Hello,

Sometimes (specifically when migrating/saving a guest which is doing a big IO operation, e.g. copying a big file) there are some (aio-related) BH operations pending. These pending BH operations are not saved as state. The ide device does not save these operations either, which may lead to data corruption.

The patch makes sure all pending BH/aio operations are flushed.

Comments/better-alternatives are welcome.

Regards,
    Uri.

QEMU_aio_bh_flush.diff
Description: QEMU_aio_bh_flush.diff