On Tue, Mar 22, 2016 at 11:55:17AM -0600, Jens Axboe wrote: > Add an internal helper and flag for setting whether a queue has > write back caching, or write through (or none). Add a sysfs file > to show this as well, and make it changeable from user space.
We do this by passing the REQ_FLUSH flag to blk_queue_flush today. While that's not a great interface, adding a second one doesn't make it any better :)
