そう根拠でnullfsが消されたりするわけだよねえ。 で、判断を下した人の認識は ttp://article.gmane.org/gmane.os.openbsd.misc/70990 It is obvious that the locking mechanisms of the vfs layer were never fully purified for these filsystems, and never will be, and 15 years of turd polishing has only made it marginally better. Meaning, that for all operating systems groups who have such a thing, weird things happen which make the filesystem behave not quite like a filesystem, and even leading to crashes. だったりするわけで。