Re: [XEN PATCH] tools/xenstore: Log xenstored build ID on startup

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 13/11/2020 14:18, Bjoern Doebel wrote:
> Right now we do not have a mechanism to determine the version of the
> currently running xenstored at runtime. As xenstored runs throughout the
> lifetime of a Xen host, this may lead to problems when newer user space
> builds are staged. Then, the running xenstored will no longer match the
> version of the installed xenstored.
>
> To allow users to always identify the running version of xenstored, add
> a linker-generated unique build ID to every xenstored build. Add
> functionality to log this build ID into a file upon service startup.
>
> Signed-off-by: Bjoern Doebel <doebel@xxxxxxxxx>
> Reviewed-by: Martin Mazein <amazein@xxxxxxxxx>
> Reviewed-by: Paul Durrant <pdurrant@xxxxxxxxxxxx>

I understand the problem you're trying to solve, but why is this
anything more than just enabling build-id's by default across tools/ ?

There are already standard ways of interacting with the build id of
running executables on the system.  I'd strongly discourage doing
anything custom in xenstored specifically.

~Andrew