On Wed, May 23, 2007 at 05:25:49PM +0200, Miklos Szeredi wrote: > > > How will this work with copy_tree() and namespace duplication, which > > > currently walk the tree with only namespace_sem held? > > > > Easy - grab namespace_sem, grab vfsmount_lock, walk the subtree and bump > > mnt_busy on everything (by 1 + number of non-busy children). Then drop > > vfsmount_lock and do as usual, dropping references in tree being copied > > as you go. Nothing will get attached or detached due to namespace_sem, > > nothing will get evicted by anybody other than you since you've got all > > that stuff pinned down. End of story... > > Right. > > Do you have some code? > > Should I try to code something up? I hope to get some breathing space next week, then I'll get back to VFS work. I'd rather do that one myself, since it'll be a long series of equivalent transformations - debugging such rewrite of refcounting done as a single patch is going to be hell. And yes, refcounting rewrite is near the top of the list (another thing is wading through several threads from hell and reviewing unionfs ;-/) - 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
