[Qemu-devel] How to stop `qemu-system-x86_64 ...` instead of `kill -9`?

[Qemu-devel] How to stop `qemu-system-x86_64 ...` instead of `kill -9`?

[Sam]

hi all,

I'm running `qemu-system-x86_64 ...` to start a guest vm. Now I want to
stop and destroy this vm, I found there is no `qemu-stop` related command,
so I have to `kill -9` this process.

How could I stop `qemu-system-x86_64` instead of `kill -9`? Use `virsh`
command or something?

Thank you~

Re: [Qemu-devel] [Qemu-discuss] How to stop `qemu-system-x86_64 ...` instead of `kill -9`?

[Vincenzo Romano]

2017-07-12 11:24 GMT+02:00 Sam <batmanustc@gmail.com>:
> hi all,
>
> I'm running `qemu-system-x86_64 ...` to start a guest vm. Now I want to
> stop and destroy this vm, I found there is no `qemu-stop` related command,
> so I have to `kill -9` this process.
>
> How could I stop `qemu-system-x86_64` instead of `kill -9`? Use `virsh`
> command or something?
>
> Thank you~

I hate virsh/libvirt.
I use the qemu monitor commands via SSH.
See http://download.qemu.org/qemu-doc.html#pcsys_005fmonitor

-- 
Vincenzo Romano - NotOrAnd.IT
Information Technologies
--
NON QVIETIS MARIBVS NAVTA PERITVS

Re: [Qemu-devel] How to stop `qemu-system-x86_64 ...` instead of `kill -9`?

[Peter Xu]

On Wed, Jul 12, 2017 at 05:24:40PM +0800, Sam wrote:
> hi all,
> 
> I'm running `qemu-system-x86_64 ...` to start a guest vm. Now I want to
> stop and destroy this vm, I found there is no `qemu-stop` related command,
> so I have to `kill -9` this process.
> 
> How could I stop `qemu-system-x86_64` instead of `kill -9`? Use `virsh`
> command or something?

"virsh destroy $name"? Or "quit" in qemu QMP/HMP?

(I'd say I use kill a lot, especially when I'm using -nographic)

-- 
Peter Xu

Re: [Qemu-devel] [Qemu-discuss] How to stop `qemu-system-x86_64 ...` instead of `kill -9`?

[Fam Zheng]

On Wed, 07/12 17:24, Sam wrote:
> hi all,
> 
> I'm running `qemu-system-x86_64 ...` to start a guest vm. Now I want to
> stop and destroy this vm, I found there is no `qemu-stop` related command,
> so I have to `kill -9` this process.

If you have a "monitor", send "quit" command is the right way. The simplest type
of monitor (HMP on your console) is with the option "-monitor stdio".

Even without monitors, SIGKILL is likely overkill. QEMU responds to SIGTERM and
SIGINT more gracefully.

Fam

Re: [Qemu-devel] How to stop `qemu-system-x86_64 ...` instead of `kill -9`?

[Philippe Mathieu-Daudé]

Hi Sam,

On 07/12/2017 06:24 AM, Sam wrote:
> I'm running `qemu-system-x86_64 ...` to start a guest vm. Now I want to
> stop and destroy this vm, I found there is no `qemu-stop` related command,
> so I have to `kill -9` this process.
> 
> How could I stop `qemu-system-x86_64` instead of `kill -9`? Use `virsh`
> command or something?

If you are using -nographic you can use the "^a x" keys sequence as 
described in the man page:

$ man qemu-system-x86_64
QEMU(1)

        During emulation, if you are using a character backend
        multiplexer (which is the default if you are using -nographic)
        then several commands are available via an escape sequence.
        These key sequences all start with an escape character, which
        is Ctrl-a by default, but can be changed with -echr. The list
        below assumes you're using the default.

        Ctrl-a h
            Print this help

        Ctrl-a x
            Exit emulator

        Ctrl-a c
            Rotate between the frontends connected to the multiplexer
            (usually this switches between the monitor and the console)

What I usually does when the guest supports ACPI is enter the monitor 
with "^a c" then type "system_powerdown" so my guest gracefully 
shutdowns, else use "^a x".

Regards,

Phil.