On Wed, Apr 08, 2009 at 07:58:54AM +0200, Jens Axboe wrote: > > I'm not even sure what is documented about this sort of thing in biodoc, > but it's actually somewhat outside the realm of block layer > documentation. The block layer should document that you need to call > unplug if you are going to be waiting for that IO. How the vm code does > it is implementation detail mostly, the important thing is that it gets > done :-) Fair enough; I agree a lot of the problem is the page writeback subsystem isn't well documented at all, and is crying out for a review for possible refactorization and cleanup.... - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html