On Fri, Nov 16, 2012 at 7:19 AM, Andriy Gapon <a...@freebsd.org> wrote:
> on 16/11/2012 01:38 Attilio Rao said the following:
>> On Thu, Nov 15, 2012 at 8:51 PM, Andriy Gapon <a...@freebsd.org> wrote:
>>> on 15/11/2012 22:00 Adrian Chadd said the following:
>>>> But I think my change is invaluable for development, where you want to
>>>> improve and debug the locking and lock interactions of a subsystem.
>>>
>>> My practical experience was that if you mess up one lock in one place, then 
>>> it
>>> is a total mess further on.  but apparently you've got a different practical
>>> experience :)
>>> What would indeed be invaluable to _me_ - if the LOR messages also produced 
>>> the
>>> stack(s) where a supposedly correct lock order was learned.
>>
>> Please note that the "supposedly correct lock order", as for the
>> definition that it is correct, can be used in several different
>> stacks. I don't see the point of saving it somewhere.
>> The only helpful case would be if the "wrong order" is catched first.
>> If this is really the case, I suggest you to force the order you
>> expect in the static table so that the first time the wrong order
>> happens it yells.
>
> Exactly my point - if I am a user of some code, not its developer, and I don't
> know which one is the correct order I would have had the complete information
> from the very start instead of having to jump through the hoops.

I don't agree -- such informations are only useful to developers and
also what should we do, store all the valid stacktraces?
I don't understand what are you expecting here honestly.

Attilio


-- 
Peace can only be achieved by understanding - A. Einstein
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