The --aio=MODE option enables Linux AIO or Windows overlapped I/O. The #ifdef CONFIG_LINUX_AIO was a layering violation that also prevented Windows overlapped I/O from being used. Now that raw-posix.c prints an error when Linux AIO has not been compiled in, we can unconditionally compile the option into qemu-nbd. After this patch qemu-nbd --aio=native works on Windows. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org - QEMU team
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