On Wed, Aug 22, 2012 at 01:27:21PM +0800, Michael Wang wrote: > And can we make sure that it is safe to sleep(schedule) at this point? > It may need some totally testing to cover all the situation...
task_work callback can bloody well block, so yes, it is safe. Hell, we are doing final close from that; that can lead to any amount of IO, up to and including on-disk file freeing and, in case of vfsmount kept alive by an opened file after we'd done umount -l, actual final unmount of a filesystem. That can more than just block, that can block for a long time if that's a network filesystem... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/