Just as a catchup for everybody being interested: I finally wrote to the linux-mm newsgroup and Linus pointed out, that this might be a known bug yet not fixed in mainline.
Unfortunately this doesn't seem to stand the test; but as far as Git is concerned, it appears that that they are willing to take actions. http://thread.gmane.org/gmane.linux.kernel/1541707/focus=105432 -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
