On 03/22/2016 12:57 PM, Christoph Hellwig wrote:
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 :)
I think the newer one is cleaner, so would make more sense to put the
flush part on top.
--
Jens Axboe
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