On Mon, Oct 15, 2012 at 11:56 AM, Jeff King <peff@xxxxxxxx> wrote: > Right. The only thing that needs locking is the refs, because the object > database is add-only for normal operations, and by definition collisions > mean you have the same content (or are astronomically unlucky, but your > consolation prize is that you can write a paper on how you found a sha1 > collision). Its worth nothing that a SHA-1 collision can be identified at the server because the server performs a byte-for-byte compare of both copies of the object to make sure they match exactly in every way. Its not fast, but its safe. :-) -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html