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The QMP monitor, NBD server, and vhost-user-blk export all support file
descriptor passing. This is a useful technique because it allows the
parent process to spawn and wait for qemu-storage-daemon without busy
waiting, which may delay startup due to arbitrary sleep() calls.
This Python example is inspired by the test case written for libnbd by
Richard W.M. Jones <rjones@redhat.com>:
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| .. | ||
| _templates | ||
| index.rst | ||
| qemu-img.rst | ||
| qemu-nbd.rst | ||
| qemu-pr-helper.rst | ||
| qemu-storage-daemon.rst | ||
| qemu-trace-stap.rst | ||
| virtfs-proxy-helper.rst | ||
| virtiofsd.rst | ||