Re: [PATCH 09/11] megaraid_sas: switch fusion adapters to MQ

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On 1/9/20 12:55 PM, John Garry wrote:
> On 09/12/2019 10:10, Sumit Saxena wrote:
>> On Mon, Dec 2, 2019 at 9:09 PM Hannes Reinecke <hare@xxxxxxx> wrote:
>>>
>>> Fusion adapters can steer completions to individual queues, and
>>> we now have support for shared host-wide tags.
>>> So we can enable multiqueue support for fusion adapters and
>>> drop the hand-crafted interrupt affinity settings.
>>
>> Hi Hannes,
>>
>> Ming Lei also proposed similar changes in megaraid_sas driver some
>> time back and it had resulted in performance drop-
>> https://patchwork.kernel.org/patch/10969511/
>>
>> So, we will do some performance tests with this patch and update you.
>>
> 
> Hi Sumit,
> 
> I was wondering if you had a chance to do this test yet?
> 
> It would be good to know, so we can try to progress this work.
> 
> @Hannes, This shared sbitmap work now seems to conflict with Jens work
> on tag caching
> https://lore.kernel.org/linux-block/20200107163037.31745-1-axboe@xxxxxxxxx/T/#t,
> but should be resolvable AFAICS (v1, anyway, which I checked). Anway, we
> seem to have stalled, which I feared...
> 
Thanks for the reminder.
That was a topic I was wanting to discuss at LSF; will be sending a
topic then.

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      Teamlead Storage & Networking
hare@xxxxxxx			                  +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), GF: Felix Imendörffer



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