Re: [Xen-devel] Re: [PATCH 0 of 9] Call hotplug scripts from libxl

[Roger Pau Monné <roger.pau@xxxxxxxxxxxxx>]

2011/10/4 Ian Campbell <Ian.Campbell@xxxxxxxxxx>:
> By default xl daemonises itself and monitors the domain waiting for it
> to exit, at which point it should perform the necessary cleanup (this is
> the call to libxl_domain_destroy in handle_domain_death).

libxl daemonises itself if you call "xl shutdown <domain>", but if the
domain shuts down from inside (doing a "halt"), xl is never called,
and therefore hotplug scripts are not executed.

> If you ask xl to not do this (using the -e or -F options) then you are
> expected to call xl destroy yourself.
>
> The call to libxl_domain_destroy calls libxl__devices_destroy which
> tears down the backends. Unfortunately this is done in a slightly
> generic way but my recent series should have laid the ground work for
> doing this in a more device-specific way.
>
> I have a feeling that libxl__device_destroy should really consist of a
> sequence of libxl_device_FOO_list+foreach(thing) libxl_device_FOO_remove
> calls rather than the current mechanism. i.e. be really explicit about
> what it is tearing down.
>
> Ian.

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