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From: Chris Ball <cjb@laptop.org>
To: Kyoungil Kim <ki0351.kim@samsung.com>
Cc: linux-mmc@vger.kernel.org
Subject: Re: [PATCH] mmc: sdio: To use multiple scatter gather list
Date: Mon, 29 Oct 2012 17:20:36 -0400	[thread overview]
Message-ID: <87d301q8kb.fsf@octavius.laptop.org> (raw)
In-Reply-To: <001101cdb044$8565abf0$903103d0$%kim@samsung.com> (Kyoungil Kim's message of "Mon, 22 Oct 2012 20:01:00 +0900")

Hi,

On Mon, Oct 22 2012, Kyoungil Kim wrote:
> We used only single sg entry for SDIO transfer.
> This chagne is to use multiple sg entry.
> In case of dwmci, it support only up to 4KB size per single sg entry.
> So if we want to transfer more than 4KB, we should send more than 1 command.
> This makes performance degradation for large data transfer.
>
> Signed-off-by: Kyoungil Kim <ki0351.kim@samsung.com>

Can you share the before/after benchmark on your controller, please?

Thanks,

- Chris.
-- 
Chris Ball   <cjb@laptop.org>   <http://printf.net/>
One Laptop Per Child

  reply	other threads:[~2012-10-29 21:20 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-22 11:01 [PATCH] mmc: sdio: To use multiple scatter gather list Kyoungil Kim
2012-10-29 21:20 ` Chris Ball [this message]
2012-11-07  5:16   ` Kyoungil Kim
2012-11-17 20:26     ` Chris Ball

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