From: Sascha Hauer <s.hauer@pengutronix.de>
To: Stefan Christ <s.christ@phytec.de>
Cc: Barebox List <barebox@lists.infradead.org>
Subject: Re: [PATCH 4/4] mtd: nand: nand_mxs: Add subpage read support
Date: Thu, 19 May 2016 09:00:56 +0200 [thread overview]
Message-ID: <20160519070056.GC11148@pengutronix.de> (raw)
In-Reply-To: <20160518065216.GA2362@lws-christ>
On Wed, May 18, 2016 at 08:52:16AM +0200, Stefan Christ wrote:
> Hi Sascha,
>
> On Tue, May 10, 2016 at 08:24:43AM +0200, Sascha Hauer wrote:
> > subpage read support can significantly speed up scanning UBI volumes, so
> > add support for it. This is inspired by the corresponding Kernel commit.
> > Unlike in the kernel we add subpage read support for i.MX28 aswell.
> > Testing it on i.MX28 revealed no problems.
> >
> > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
>
> Here is my
>
> Tested-by: Stefan Christ <s.christ@phytec.de>
>
> I measured the ubiattach time for two different NAND chips after an ubiformat
> on the devices. It's around 30% faster. Here are the results:
Thanks for testing this.
The results become even better with bigger pages. I have a board with 8k
page Nand here. The scanning time reduced from 31s to 3.5s.
Sascha
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prev parent reply other threads:[~2016-05-19 7:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-10 6:24 [PATCH 1/4] mtd: nand: nand_mxs: Factor out BCH setup function Sascha Hauer
2016-05-10 6:24 ` [PATCH 2/4] mtd: nand: Pass page argument to read_subpage hook Sascha Hauer
2016-05-10 6:24 ` [PATCH 3/4] mtd: nand: Enable subpage reads Sascha Hauer
2016-05-10 6:24 ` [PATCH 4/4] mtd: nand: nand_mxs: Add subpage read support Sascha Hauer
2016-05-18 6:52 ` Stefan Christ
2016-05-19 7:00 ` Sascha Hauer [this message]
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