On Fri, May 15, 2015 at 06:47:04PM -0700, Linus Torvalds wrote: > Now, maybe we could solve it with a new sleeping lock in the dentry > itself. Maybe we could allocate the new dentry early, add it to the > directory the usual way, but mark it as being "not ready" (so that > d_lookup() wouldn't use it). And have the sleeping lock be a new > sleeping lock in the dentry. See upthread. It might be doable (provided that we turn ->i_mutex into rwsem, to keep the exclusion with directory _modifiers_), but it'll need a really non-trivial code review of a bunch of filesystems, especially ones that want to play with the list of children like ceph does. And things like sillyrename and dcache-populating readdir instances, albeit not as scary as ceph. And then there's lustre... -- 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
