Re: [PATCH qemu-server v2] fix #7119: qm cleanup: wait for process exiting for up to 30 seconds

[Benjamin McGuire <jaminmc@gmail.com>]

Tested-by: Benjamin McGuire <jaminmc@gmail.com>


> On Feb 10, 2026, at 6:15 AM, Dominik Csapak <d.csapak@proxmox.com> wrote:
> 
> When qmeventd detects a vm exiting, it starts 'qm cleanup' to cleanup
> files, executing hookscripts, etc.
> 
> Since the vm process exits is sometimes not instant, wait up to 30
> seconds here to start the cleanup process instead of immediately
> aborting if the pid still exits. This prevented executing the hookscript
> on the 'post-stop' phase.
> 
> This can be easily reproduced by e.g. passing through a usb device,
> which delays the qemu process exit for a few seconds.
> 
> Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
> ---
> changes from v1:
> * use correct while condition (time() is always >= $starttime)
> 
> original comment:
> 
> The 30 second timeout was arbitrarily chosen, but we could probably
> start with something smaller, like 10 seconds? Could be adapted on
> applying though.
> 
> In my (short) tests the usb passthrough part only adds a single second,
> but i can imagine different devices on other systems could block it for
> much longer.
> 
> src/PVE/CLI/qm.pm | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/src/PVE/CLI/qm.pm b/src/PVE/CLI/qm.pm
> index bdae9641..16875ed2 100755
> --- a/src/PVE/CLI/qm.pm
> +++ b/src/PVE/CLI/qm.pm
> @@ -1101,8 +1101,19 @@ __PACKAGE__->register_method({
>             60,
>             sub {
>                 my $conf = PVE::QemuConfig->load_config($vmid);
> +
> +                # wait for some timeout until vm process exits, since this might not be instant
> +                my $timeout = 30;
> +                my $starttime = time();
>                 my $pid = PVE::QemuServer::check_running($vmid);
> -                die "vm still running\n" if $pid;
> +                warn "vm still running - waiting up to $timeout seconds\n" if $pid;
> +
> +                while ($pid && (time() - $starttime) < $timeout) {
> +                    sleep(1);
> +                    $pid = PVE::QemuServer::check_running($vmid);
> +                }
> +
> +                die "vm still running - aborting cleanup\n" if $pid;
> 
>                 # Rollback already does cleanup when preparing and afterwards temporarily drops the
>                 # lock on the configuration file to rollback the volumes. Deactivating volumes here
> -- 
> 2.47.3
> 
> 
> 
> 
>