Messages in this thread | | | Subject | Re: [PATCH 3/6] block: add ability to flag write back caching on a device | From | Jens Axboe <> | Date | Tue, 22 Mar 2016 12:59:45 -0600 |
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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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