util/async-teardown: wire up query-command-line-options
Add new -run-with option with an async-teardown=on|off parameter. It is
visible in the output of query-command-line-options QMP command, so it
can be discovered and used by libvirt.
The option -async-teardown is now redundant, deprecate it.
Reported-by: Boris Fiuczynski <fiuczy@linux.ibm.com>
Fixes: c891c24b1a ("os-posix: asynchronous teardown for shutdown on Linux")
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-Id: <20230505120051.36605-2-imbrenda@linux.ibm.com>
[thuth: Add curly braces to fix error with GCC 8.5, fix bug in deprecated.rst]
Signed-off-by: Thomas Huth <thuth@redhat.com>
diff --git a/qemu-options.hx b/qemu-options.hx
index 42b9094..30690d9 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4828,20 +4828,32 @@
DEF("async-teardown", 0, QEMU_OPTION_asyncteardown,
"-async-teardown enable asynchronous teardown\n",
QEMU_ARCH_ALL)
-#endif
SRST
``-async-teardown``
- Enable asynchronous teardown. A new process called "cleanup/<QEMU_PID>"
- will be created at startup sharing the address space with the main qemu
- process, using clone. It will wait for the main qemu process to
- terminate completely, and then exit.
- This allows qemu to terminate very quickly even if the guest was
- huge, leaving the teardown of the address space to the cleanup
- process. Since the cleanup process shares the same cgroups as the
- main qemu process, accounting is performed correctly. This only
- works if the cleanup process is not forcefully killed with SIGKILL
- before the main qemu process has terminated completely.
+ This option is deprecated and should no longer be used. The new option
+ ``-run-with async-teardown=on`` is a replacement.
ERST
+DEF("run-with", HAS_ARG, QEMU_OPTION_run_with,
+ "-run-with async-teardown[=on|off]\n"
+ " misc QEMU process lifecycle options\n"
+ " async-teardown=on enables asynchronous teardown\n",
+ QEMU_ARCH_ALL)
+SRST
+``-run-with``
+ Set QEMU process lifecycle options.
+
+ ``async-teardown=on`` enables asynchronous teardown. A new process called
+ "cleanup/<QEMU_PID>" will be created at startup sharing the address
+ space with the main QEMU process, using clone. It will wait for the
+ main QEMU process to terminate completely, and then exit. This allows
+ QEMU to terminate very quickly even if the guest was huge, leaving the
+ teardown of the address space to the cleanup process. Since the cleanup
+ process shares the same cgroups as the main QEMU process, accounting is
+ performed correctly. This only works if the cleanup process is not
+ forcefully killed with SIGKILL before the main QEMU process has
+ terminated completely.
+ERST
+#endif
DEF("msg", HAS_ARG, QEMU_OPTION_msg,
"-msg [timestamp[=on|off]][,guest-name=[on|off]]\n"