On Thu, Mar 14, 2013 at 12:06 AM, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> wrote: > On Wed, 13 Mar 2013 15:16:32 +0100 Miklos Szeredi <miklos@xxxxxxxxxx> wrote: > >> From: Neil Brown <neilb@xxxxxxx> >> >> Document the overlay filesystem. >> > > Damn, I did it again. This is good, thanks. > >> +Changes to the underlying filesystems while part of a mounted overlay >> +filesystem are not allowed. If the underlying filesystem is changed, >> +the behavior of the overlay is undefined, though it will not result in >> +a crash or deadlock. > > ah-hah, there it is. I was wondering how this can-o-worms would be > handled ;) > > Is there anything in place to enforce this at runtime? Checks for > read-onlyness, code to prevent rw remounts, etc? No, currently it is not enforced. I didn't think this was important enough, and there was no complaint about this from users. I think most people are going to be careful, especially if lots of warnings are given in the documentation. Thanks, Miklos -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
