From: Artem Bityutskiy <dedekind@infradead.org>
To: Alexey Korolev <akorolev@infradead.org>
Cc: dwmw2@infradead.org, joern@logfs.org,
linux-mtd@lists.infradead.org, tglx@linutronix.de,
hamish@cloud.net.au
Subject: Re: [PATCH] NAND subpage read feature as a way to increase performance. Take 2.
Date: Fri, 16 May 2008 08:01:18 +0300 [thread overview]
Message-ID: <1210914078.27243.13.camel@sauron> (raw)
In-Reply-To: <Pine.LNX.4.64.0805151643360.32186@pentafluge.infradead.org>
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>
Thanks!
--
Best regards,
Artem Bityutskiy (Битюцкий Артём)
next prev parent reply other threads:[~2008-05-16 5:02 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 [this message]
2008-05-16 5:10 ` Jörn Engel
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