From: Arnd Bergmann <arnd@arndb.de>
To: Andrei Warkentin <andreiw@motorola.com>
Cc: linux-mmc@vger.kernel.org
Subject: Re: [RFC 4/5] MMC: Adjust unaligned write accesses.
Date: Sun, 13 Mar 2011 15:54:37 +0100 [thread overview]
Message-ID: <201103131554.38028.arnd@arndb.de> (raw)
In-Reply-To: <AANLkTinYmXrn=UmJDcr-2aAN5jChfTTX9EebCu9xbibc@mail.gmail.com>
On Sunday 13 March 2011 14:00:04 Andrei Warkentin wrote:
> > If the latter two are not much different on the toshiba card, that
> > would be a simpler implementation, and more likely to be useful on
> > other cards.
> >
>
> Revalidating the data now, along with some more tests, to get a better
> picture. It seems the more data I get, the less it makes sense :(.
I was already fearing that the change would only benefit low-level
benchmarks. It certainly helps writing small chunks to the buffer
that is meant for FAT32 directories, but at some point, the card
will have to write back the entire logical erase block, so you
might not be able to gain much in real-world workloads.
Of course, I also have only a very limited understanding of the
algorithm used in the Toshiba chip.
Arnd
next prev parent reply other threads:[~2011-03-13 14:54 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-10 0:54 Block quirks redux + Toshiba performance quirk Andrei Warkentin
2011-03-10 0:12 ` Andrei Warkentin
2011-03-10 0:54 ` [RFC 1/5] MMC: Extends card quicks with MMC/SD quirks matching the CID Andrei Warkentin
2011-03-10 0:54 ` [RFC 2/5] MMC: Allow function-specific quirks Andrei Warkentin
2011-03-10 15:09 ` Arnd Bergmann
2011-03-10 20:41 ` Andrei Warkentin
2011-03-10 21:55 ` Arnd Bergmann
2011-03-10 0:54 ` [RFC 3/5] MMC: Support for block quirks Andrei Warkentin
2011-03-10 0:54 ` [RFC 4/5] MMC: Adjust unaligned write accesses Andrei Warkentin
2011-03-10 16:05 ` Arnd Bergmann
2011-03-10 20:45 ` Andrei Warkentin
2011-03-10 21:54 ` Arnd Bergmann
2011-03-10 23:06 ` Andrei Warkentin
2011-03-11 10:23 ` Arnd Bergmann
2011-03-13 13:00 ` Andrei Warkentin
2011-03-13 14:54 ` Arnd Bergmann [this message]
2011-03-14 7:40 ` Andrei Warkentin
2011-03-19 11:09 ` Andrei Warkentin
2011-03-21 14:21 ` Arnd Bergmann
2011-03-21 14:41 ` Andrei Warkentin
2011-03-21 18:03 ` Andreas Dilger
2011-03-21 19:05 ` Arnd Bergmann
2011-03-21 23:58 ` Andreas Dilger
2011-03-22 13:56 ` Arnd Bergmann
2011-03-22 15:02 ` Andreas Dilger
2011-03-22 15:44 ` Arnd Bergmann
2011-03-10 0:54 ` [RFC 5/5] MMC: Toshiba eMMC - Split 8K-unaligned accesses Andrei Warkentin
2011-03-10 1:03 ` [RFC] MMC: Extends card quicks with MMC/SD quirks matching the CID Andrei Warkentin
-- strict thread matches above, loose matches on Subject: below --
2011-03-21 14:27 Fwd: Re: [RFC 4/5] MMC: Adjust unaligned write accesses Arnd Bergmann
2011-03-21 23:45 ` Andreas Dilger
2011-03-22 7:18 ` Andrei Warkentin
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