On Tue, May 20, 2008 at 02:43:06PM +0100, Al Viro wrote: > No, you have not and no, doing that anywhere near that layer is hopeless. > > a) Instances of filesystem can easily outlive all vfsmounts, > let alone their attachment to namespaces. > b) What should happen if init is done in the middle of exit? > c) Why do we need to bother, anyway? We had a discussion about filesystems starting threads without an active instance. I suggested tracking instances and add ->init / ->exit methods to struct file_system_type for these kinds of instances. But we should track superblock instances, not vfsmount instances of course. Tom, you probably don't even need a counter, emptyness of file_system_type.fs_supers should be indication enough. And yes we'd need locking to prevent init racing with exit. -- 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
