Re: Fast access git-rev-list output: some OS knowledge required

[Linus Torvalds <torvalds@osdl.org>]

On Thu, 7 Dec 2006, Johannes Schindelin wrote:
> 
> Because, depending on what you do, the revision machinery is not 
> reentrable. For example, if you filter by filename, the history is 
> rewritten in-memory to simulate a history where just that filename was 
> tracked, and nothing else. These changes are not cleaned up after calling 
> the internal revision machinery.

Well, it really wouldn't be that hard to add a new library interface to 
"reset object state". We could fairly trivially either:

 - walk all objects in the object hashes and clear all the flags.
 - just clear all objects _and_ the hashes.

Yes, it implies a small amount of manual "management", but considering 
that the reason it needs to be manual is that the functions simply _need_ 
the state, is that such a big deal?