[PATCH for-4.5 03/13] NVMe: Allow request merges

[Jens Axboe]

On 02/10/2016 11:36 AM, Christoph Hellwig wrote:
> On Wed, Feb 10, 2016 at 11:17:20AM -0700, Keith Busch wrote:
>> It is generally more efficient to submit larger IO.
>
> In general it is, but it might be good to try to understand
> why this flag was set in the first place, and why the argument
> for that isn't true anymore, or never was.

IIRC, it was set when the conversion to blk-mq happened, since the 
original driver could not do merges being bio based.

-- 
Jens Axboe