Hello, this patch series attempts to solve the problems with the life time of a backing_dev_info structure. Currently it lives inside request_queue structure and thus it gets destroyed as soon as request queue goes away. However the block device inode still stays around and thus inode_to_bdi() call on that inode (e.g. from flusher worker) may happen after request queue has been destroyed resulting in oops. This patch set tries to solve these problems by making backing_dev_info independent structure referenced from block device inode. That makes sure inode_to_bdi() cannot ever oops. The patches are lightly tested for now (they boot, basic tests with adding & removing loop devices seem to do what I'd expect them to do ;). If someone is able to reproduce crashes on bdi when device goes away, please test these patches. I'd also appreciate if people had a look whether the approach I took looks sensible. Honza -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
