Re: [Qemu-devel] [PATCH v3] fw_cfg: RFQDN rules, documentation

["Michael S. Tsirkin" <mst@redhat.com>]

On Thu, Apr 14, 2016 at 09:39:07AM +0200, Markus Armbruster wrote:
> "Michael S. Tsirkin" <mst@redhat.com> writes:
> 
> > On Wed, Apr 13, 2016 at 06:19:55PM +0200, Markus Armbruster wrote:
> >> "Michael S. Tsirkin" <mst@redhat.com> writes:
> >> 
> >> > On Wed, Apr 13, 2016 at 10:59:35AM +0200, Markus Armbruster wrote:
> >> >> If we can protect them without
> >> >> complicating or breaking stuff, sure, why not.  But not at all costs.
> >> >
> >> > The stuff we break is precisely the stuff our warnings
> >> > say might break at any time. So since you believe users
> >> > might be relied on not to ignore warnings, it should be ok ...
> >> >
> >> > As for complicating things - about 5 lines of code are spent
> >> > on the unsupported/root/ hack. It *is* a hack but
> >> > contained enough not to worry me too much ...
> >> 
> >> I'm not worried about the implementation complexity at all.  It's the
> >> user interface complexity.  After this patch, we have a non-trivial
> >> mapping from -fw_cfg name to FW_CFG filename to explain.  Whereas now,
> >> -fw_cfg name *is* the FW_CFG path.
> >
> > Only for people who ignore the rules. Most people have a trivial
> > mapping.
> 
> Even when most usage falls into the simple cases, you still have to
> explain all cases.
> 
> An interface's complexity is a property of the interface, not of its
> usage.

I think I disagree. Make simple things simple and complex things
possible is the rule for a good interface.

-- 
MST