[PATCH 9/9] nvme: add support for streams and directives

[Jens Axboe]

On 06/27/2017 08:46 AM, Jens Axboe wrote:
> On 06/27/2017 08:44 AM, Christoph Hellwig wrote:
>> On Tue, Jun 27, 2017 at 08:16:49AM -0600, Jens Axboe wrote:
>>> But we have to handle it, not doing so would be fragile. So our
>>> options are:
>>>
>>> 1) Keep the stream_mappings[] array. It's simple, and it'll work
>>>    for any number of streams.
>>>
>>> 2) Kill stream_mappings[] and just do the MOD again.
>>
>> 3) print a message and tell streams aren't supported on this device.
> 
> Is that your nvme preference - if less than 4 streams, just ignore it?
> Would seem a shame to lose out with 2 streams, I can think of several
> hot/cold scenarios that would probably work fine with that. But at the
> same time, not a big deal to me, if you prefer just turning it off
> for < 4 streams, that's fine with me.

http://git.kernel.dk/cgit/linux-block/commit/?h=write-stream&id=98335ae1347a9a08adc831e77e8fefcf06ab8282

-- 
Jens Axboe