From: "Jörn Engel" <joern@logfs.org>
To: Artem Bityutskiy <dedekind@infradead.org>
Cc: linux-mtd@lists.infradead.org, tglx@linutronix.de,
dwmw2@infradead.org, Alexey Korolev <akorolev@infradead.org>,
hamish@cloud.net.au
Subject: Re: [PATCH] NAND subpage read feature as a way to increase performance. Take 2.
Date: Fri, 16 May 2008 07:10:01 +0200 [thread overview]
Message-ID: <20080516051001.GA11460@logfs.org> (raw)
In-Reply-To: <1210914078.27243.13.camel@sauron>
On Fri, 16 May 2008 08:01:18 +0300, Artem Bityutskiy wrote:
> On Thu, 2008-05-15 at 17:23 +0100, Alexey Korolev wrote:
> > Hi,
> >
> > This patch enables NAND subpage read functionality.
> > If upper layer drivers are requesting to read non page aligned data NAND
> > subpage-read functionality reads the only whose ECC regions which include
> > requested data when original code reads whole page.
> > This significantly improves performance in many cases.
> >
> > Here are some digits :
> >
> > UBI volume mount time
> > No subpage reads: 5.75 seconds
> > Subpage read patch: 2.42 seconds
> >
> > Open/stat time for files on JFFS2 volume:
> > No subpage read 0m 5.36s
> > Subpage read 0m 2.88s
> >
> > Signed-off-by Alexey Korolev <akorolev@infradead.org>
> > -------------------------
>
> Looks good to me,
> Acked-by Artem Bityutskiy <dedekind@infradead.org>
Same here
Acked-by: Joern Engel <joern@logfs.org>
Jörn
--
Joern's library part 6:
http://www.gzip.org/zlib/feldspar.html
prev parent reply other threads:[~2008-05-16 5:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-15 16:23 [PATCH] NAND subpage read feature as a way to increase performance. Take 2 Alexey Korolev
2008-05-16 5:01 ` Artem Bityutskiy
2008-05-16 5:10 ` Jörn Engel [this message]
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