Re: [PATCH v2 0/6] perf: Introduce extended syscall error reporting

[Johannes Berg <johannes@sipsolutions.net>]

On Tue, 2015-08-25 at 22:07 -0700, Linus Torvalds wrote:

> > No, the current MAX_ERRNO is probably not big enough if this scheme is successful,
> > and I don't see any reason why it wouldn't be successful: I think this feature
> > would be the biggest usability feature added to Linux system calls and to Linux
> > system tooling in the last 10 years or so.
> Don't be silly. It's a horrible idea. People would want to 
> internationalize the strings etc, and nobody would use the extended 
> versions anyway, since nobody uses raw system calls.

That's a good point, and think that least in the netlink case it'd be
much better to say which attribute was the one that had an issue, and
that has an obvious binary encoding rather than encoding that in a
string.

Perhaps that's something I can play with separately.

johannes