Re: [Xen-devel] [RFC] removing proc-xen.mount due to systemd change

[Franck Bui <fbui@xxxxxxx>]

On 10/02/2017 12:35 PM, Wei Liu wrote:
> On Mon, Oct 02, 2017 at 12:26:24PM +0200, Vasilis Liaskovitis wrote:
>> - any other options?
> 
> Can we just make the unit not fail? I.e. when it detects xenfs is
> already mounted, it does nothing but reports success.
> 

Unfortunately that's currently not possible as systemd fails when
*loading* the mount unit.

Therefore whatever the conditions you put in the mount unit (to avoid
systemd starting it) won't be considered at all as systemd will refuse
to load a mount unit whose target path is part of the API file systems.

An indirection could be added, that is adding a simple service that
would require the mount unit and contains the conditions that would
prevent its starting if /proc/xen is already mounted but that doesn't
look pretty...

I think it would be better to continue the discussion here [1], as a
solution might require some changes on systemd side.

Thanks.


[1] https://github.com/systemd/systemd/issues/6442

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