On Mon 08-10-12 22:05:38, Prashant Shah wrote: > Hi, > > On Mon, Oct 8, 2012 at 9:49 PM, Jan Kara <jack@xxxxxxx> wrote: > > And what tool are you using for monitoring? > > I am using printk(). A custom module that changes the make_request_fn > of the block device to a custom callback. In the callback I am > printing the request bio details and passing the bio back to the > original make_request_fn. OK. There are several ways how I could imagine you hit ino == 0. Either someone is using direct IO or inode is a block device inode... Honza -- 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