[PATCH] NVMe: Add support to receive NVMe asynchronous events

[wyung@micron.com (Winson Yung (wyung))]

Keith, I do see a need to enable async event in the NVMe kernel driver. 
For example, when there is a temperature above threshold, driver can 
take an action (by telling firmware) to lower down operating frequency, 
or throttle IO request to protect drive from premature over heat damage.

/Winson

On 5/26/2014 5:56 PM, Keith Busch wrote:
> On Mon, 26 May 2014, Matthew Wilcox wrote:
>> You should probably take a look at Keith's work last year to allow userspace
>> to send async event requests:
>>
>> http://lists.infradead.org/pipermail/linux-nvme/2013-August/000350.html
>
> Yeah, that proposal just lets userspace consume the results of an async
> request from a FIFO read through the character device. The driver still
> has to do the sending since there's no mechanism for requests from user
> space with infinite timeout.
>
> I've no idea if the proposed method for consuming results of this kind
> of information was typical. I assumed it wasn't since it didn't get much
> traction. :)
>