Jan Blunck wrote: > Here is another post of the VFS based union mount implementation. Unlike > the traditional mount which hides the contents of the mount point, union > mounts present the merged view of the mount point and the mounted > filesytem. Great! > Recent changes: > - brand new union structure no longer tied to the dentryn, now works with > bind mounts > - generic part of the whiteout patches extracted > - introduces MS_WHITEOUT to make the white-out patches independant of the > union-mount stuff > - uses a singleton whiteout inode for the tmpfs filesystem (I need to fix > this for ext2/3, too) > - renaming files on unions uses copyup now I wonder if this copyup functionality could be generalized to induce CoW when modifying hard-linked files. Does that sound feasible? > - rewrote the union mount debugging code: it is now debugfs/relay based. > - random cleanups > > I'm able to compile the kernel with this patches applied on a 3 layer > union mount with the seperate layers bind mounted to different locations. > I haven't done any performance tests since I think there is a more > important topic ahead: better readdir() support. What about the umount oops? Did that get fixed? > This series is against 2.6.22-rc6-mm1. Things as big and important like this should probably also be diff'd against mainline, to increase testing input. Thanks! -- Al - 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
