linux-kernel - RE: [PATCH v4 0/2] Do not flush cache when it is disabled

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Date:   Thu, 22 Apr 2021 09:41:07 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Avri Altman <Avri.Altman@....com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Adrian Hunter <adrian.hunter@...el.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v4 0/2] Do not flush cache when it is disabled

Ulf - Would you consider picking this sires up now?
I was hoping to close this bug.

Thanks,
Avri

> -----Original Message-----
> From: Avri Altman <avri.altman@....com>
> Sent: Tuesday, 20 April 2021 16:47
> To: Ulf Hansson <ulf.hansson@...aro.org>; linux-mmc@...r.kernel.org; Adrian
> Hunter <adrian.hunter@...el.com>
> Cc: linux-kernel@...r.kernel.org; Avri Altman <Avri.Altman@....com>
> Subject: [PATCH v4 0/2] Do not flush cache when it is disabled
> 
> v3 -> v4
>  - Attend Adrian's comments
>  - Add Acked-by tag
> 
> v2 -> v3:
>  - rebase onto recent cache changes
> 
> v1 -> v2:
>  - Attend Adrian's comments
> 
> Cache is a temporary storage space in an eMMC device. Volatile by
> nature, the cache should in typical case reduce the access time compared
> to an access to the main nonvolatile storage.
> 
> The cache function can be turned ON and OFF. Once OFF, the host is not
> expected to issue a flush-cache command to the device.
> 
> Avri Altman (2):
>   mmc: block: Issue flush only if allowed
>   mmc: block: Update ext_csd.cache_ctrl if it was written
> 
>  drivers/mmc/core/block.c   | 21 +++++++++++++++++++++
>  drivers/mmc/core/mmc.c     |  2 +-
>  drivers/mmc/core/mmc_ops.h |  5 +++++
>  3 files changed, 27 insertions(+), 1 deletion(-)
> 
> --
> 2.25.1