Re: [Xen-devel] [PATCH 2/2] systemd: drop dependency on proc-xen.mount in xendriverdomain.service

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 25/07/16 10:34, Wei Liu wrote:
> On Mon, Jul 25, 2016 at 11:30:32AM +0200, Marek Marczykowski-Górecki wrote:
>> On Mon, Jul 25, 2016 at 10:27:47AM +0100, Wei Liu wrote:
>>> On Sun, Jul 24, 2016 at 09:27:13PM +0200, Marek Marczykowski-Górecki wrote:
>>>> It is no longer required since xl devd use /dev/xen interface.
>>>>
>>> How would this unit work when there is no /dev/xen interface?
>> Does it happen in reality? I thought /proc/xen is deprecated for a long
>> time...

It really should be, but isn't.

/proc/xen/capabilities and /proc/xen/allsyms (?) don't have any
equivalent in /dev/

>>
> I can't tell whether it happens in reality or not. I also hope to get
> rid of deprecated interface but they are here to stay for as long as it
> takes.
>
> I guess the question is, do you have a compelling reason against keeping
> this dependency?

We really should be making xenfs deprecated and able to be compiled out
of Linux.  It is a hangover of the early classic kernels which isn't
necessary, and causes subtle/weird failures if it isn't mounted.

~Andrew

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