Re: [PATCH v1 0/4]mmc: enable eMMC4.41 new feature backgroundoperations and HPI
From: Kyungmin Park
Date: Wed Nov 24 2010 - 03:12:23 EST
Hi,
Basic question. Do you have any performance gain or improvement?
In my test environment. no performance gain. Yes I know it's not for
performance improvement.
How to measure or check it has some improvement?
Any ideas?
Thank you,
Kyungmin Park
On Tue, Nov 23, 2010 at 5:43 PM, Chuanxiao Dong
<chuanxiao.dong@xxxxxxxxx> wrote:
> Hi,
> These patches were enabled eMMC4.41 standard new feature: background
> operations and HPI.
>
> Since these two features are opertional, driver only enable for those
> eMMC card which supports them.
>
> HPI can interrupt both background operations and low priority foreground
> operations. In these patches, only implemented using HPI to interrupt
> background operations.
>
> patch1: enable background operations feature for supported eMMC card.
> patch2: let eMMC card do background operations when user reqeust queue
> is idle. In this patch, also considered when driver added runtime power
> management.
> patch3: enable HPI feature for supported eMMC card.
> patch4: use HPI to interrupt background operations if there is user
> request(foreground operations).
>
> Thanks
> Chuanxiao
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