[systemd-devel] [PATCH 3/4] connection: use the already cached metadata if KDBUS_HELLO_CACHE_META is set

[Kay Sievers]

On Fri, Jun 27, 2014 at 12:32 PM, Djalal Harouni <tixxdz at opendz.org> wrote:
> For connections with the KDBUS_HELLO_CACHE_META flag dup the
> metadata/credentials from handle or from the HELLO cmd, and use it to
> construct kdbus kmsg object, this improves benchmark by ~50%
>
> The KDBUS_HELLO_CACHE_META flag is only for privileged bus users, others
> will fail with -EPERM. Privileged bus users can do what ever they want.

Metadata contains timestamps, global message sequence numbers,  PIDs,
none of that should be cached or faked, I think.

Kay