linux-kernel - Re: [PATCH v8 00/12] use nonblock mmc requests to minimize latency

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Message-Id: <201107022137.30138.arnd@arndb.de>
Date:	Sat, 2 Jul 2011 21:37:29 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"Russell King - ARM Linux" <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	linaro-dev@...ts.linaro.org,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Chris Ball <cjb@...top.org>,
	Per Forlin <per.forlin@...aro.org>,
	Nickolay Nickolaev <nicknickolaev@...il.com>
Subject: Re: [PATCH v8 00/12] use nonblock mmc requests to minimize latency

On Saturday 02 July 2011 14:29:38 Russell King - ARM Linux wrote:
> One other thing to be considered here is whether this idea should be
> limited to just MMC or whether it should be extended further, to
> move the DMA mapping stuff out of the hot path for other block devices
> too.
> 
> There are ARM systems with SATA which do 28MB/s - which could be
> improved by this technique.

Excellent point. We had discussed SATA items in the context of Linaro
work before, and the conclusion was always that we wouldn't need to
do any work for it in the common code. I'll make sure that we bring
it up at the meeting next month in Cambridge so we can officially
assign someone to do this.

	Arnd
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