On Wed, Jun 20, 2007 at 12:43:56PM +0000, Jan Blunck wrote: > On Wed, 20 Jun 2007 13:32:23 +0100, Christoph Hellwig wrote: > > > On Wed, Jun 20, 2007 at 07:29:55AM +0000, Jan Blunck wrote: > >> Mounting a file system twice is bad in the first place. This should be > >> done by using bind mounts and bind a mounted file system into a union. > >> After that the normal locking rules apply (and hopefully work ;). > > > > From the kernel POV mounting a filesystem twice is the same as doing > > a bind mount. > > Somehow I thought about doing this: > > mount /dev/dasda1 /mnt/A > mount /dev/dasda1 /mnt/B > > ... which doesn't result in a bind mount.
But the kernel internal effect is exactly the same. One superblock instance, two vfsmounts referring to it. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
