On 9/14/12 5:36 AM, Ingo Molnar wrote:
Well, then that is useful information we *lost*, and that
situation needs to be improved on the ABI side: an expanded
error code present in the event structure, copied back to
user-space on errors, or so.
(Alternatively, a special event channel just to pass back
expanded error conditions.)
Computers are supposed to make life easier for humans, by
answering such "what did go wrong?" questions. Our losing of
precise error conditions is a usability bug really - and in the
perf project we are in a unique position to be able to improve
both the kernel side code and make immediate use of it on the
tooling side as well.
Understood and there have been suggestions on how to definitely state
what the kernel side did not like. I like Peter's last suggestion --
something along the lines of clearing attr on a failure except the
offending setting.
David
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
