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Date: Mon, 25 Mar 2024 10:23:07 -0700
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Subject: Re: [RFC PATCH 0/2] Introduce per-task io utilization boost
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To: Christian Loehle <christian.loehle@arm.com>,
 Qais Yousef <qyousef@layalina.io>
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From: Bart Van Assche <bvanassche@acm.org>
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On 3/25/24 05:06, Christian Loehle wrote:
> On 21/03/2024 19:52, Bart Van Assche wrote:
>> On 3/21/24 10:57, Christian Loehle wrote:
>>> In the long-term it looks like for UFS the problem will disappear as we are
>>> expected to get one queue/hardirq per CPU (as Bart mentioned), on NVMe that
>>> is already the case.
>>
>> Why the focus on storage controllers with a single completion interrupt?
>> It probably won't take long (one year?) until all new high-end
>> smartphones may have support for multiple completion interrupts.
> 
> Apart from going to "This patch shows significant performance improvements on
> hardware that runs mainline today" to "This patch will have significant
> performance improvements on devices running mainline in a couple years"
> nothing in particular.

That doesn't make sense to me. Smartphones with UFSHCI 4.0 controllers
are available from multiple vendors. See also 
https://en.wikipedia.org/wiki/Universal_Flash_Storage. See also
https://www.gsmarena.com/samsung_galaxy_s24-12773.php.

Bart.