From: Richard Weinberger <richard@nod.at>
To: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
Mike Frysinger <vapier@gentoo.org>,
Artem Bityutskiy <dedekind1@gmail.com>,
Michael Opdenacker <michael.opdenacker@free-electrons.com>,
"linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
Piergiorgio Beruto <piergiorgio.beruto@gmail.com>,
Brian Norris <computersforpeace@gmail.com>,
David Woodhouse <dwmw2@infradead.org>, Willy Tarreau <w@1wt.eu>
Subject: Re: [PATCH 1/1] ubi: Introduce block devices for UBI volumes
Date: Mon, 10 Feb 2014 08:53:14 +0100 [thread overview]
Message-ID: <52F8856A.6050208@nod.at> (raw)
In-Reply-To: <20140210012913.GA9505@localhost>
Am 10.02.2014 02:29, schrieb Ezequiel Garcia:
>>> +
>>> + mutex_lock(&dev->vol_mutex);
>>> + res = do_ubiblock_request(dev, req);
>>> + mutex_unlock(&dev->vol_mutex);
>>
>> This means that you can never do parallel IO?
>>
>
> Indeed. Feel free to prepare a follow-up patch improving it,
> once this is merged.
Sorry, this is a very lame argument.
You need to describe why your application design has this flaw.
Modern SoC have very often more than one CPU and many filesystems can to parallel IO.
I'm sure currently the read performance of squashfs suffers because of that.
Thanks,
//richard
next prev parent reply other threads:[~2014-02-10 7:53 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-29 20:38 [PATCH 0/1] ubi: Introduce block devices for UBI volumes Ezequiel Garcia
2014-01-29 20:38 ` [PATCH 1/1] " Ezequiel Garcia
2014-01-31 17:06 ` Willy Tarreau
2014-02-04 11:06 ` Ezequiel Garcia
2014-02-08 16:50 ` Ezequiel Garcia
2014-02-08 21:37 ` Richard Weinberger
2014-02-08 22:51 ` Willy Tarreau
2014-02-08 22:56 ` Richard Weinberger
2014-02-08 23:01 ` Willy Tarreau
2014-02-08 23:10 ` Piergiorgio Beruto
2014-02-08 23:13 ` Richard Weinberger
2014-02-08 23:15 ` Willy Tarreau
2014-02-08 23:25 ` Richard Weinberger
2014-02-08 23:37 ` Willy Tarreau
2014-02-09 0:17 ` Richard Weinberger
2014-02-09 7:51 ` Willy Tarreau
2014-02-10 2:48 ` Ezequiel Garcia
2014-02-10 7:35 ` Artem Bityutskiy
2014-02-10 8:27 ` Ezequiel Garcia
2014-02-10 8:46 ` Willy Tarreau
2014-02-10 14:20 ` Ezequiel Garcia
2014-02-10 14:41 ` Richard Weinberger
2014-02-10 14:50 ` Artem Bityutskiy
2014-02-10 14:52 ` Bityutskiy, Artem
2014-02-10 16:15 ` Willy Tarreau
2014-02-10 14:53 ` Bityutskiy, Artem
2014-02-10 18:48 ` Ezequiel Garcia
[not found] ` <a86d653a-9e3b-46dc-9ec8-94a9c1099bec@email.android.com>
2014-02-10 21:43 ` Willy Tarreau
2014-02-11 8:37 ` Geert Uytterhoeven
2014-02-11 9:05 ` Willy Tarreau
2014-02-11 9:35 ` Ezequiel Garcia
2014-02-11 9:43 ` Peter Korsgaard
2014-02-11 10:21 ` Geert Uytterhoeven
2014-02-10 22:37 ` Thomas Petazzoni
[not found] ` <de976336-3144-4f21-859b-d1a37fc3d811@email.android.com>
2014-02-10 22:46 ` Thomas Petazzoni
[not found] ` <a3fc06a8-c809-4687-9da4-015bd8dd29e8@email.android.com>
2014-02-10 23:01 ` Thomas Petazzoni
2014-02-10 23:19 ` Ezequiel Garcia
2014-02-10 8:50 ` Artem Bityutskiy
2014-02-08 23:05 ` Piergiorgio Beruto
2014-02-08 23:13 ` Willy Tarreau
2014-02-10 8:42 ` Thomas Petazzoni
2014-02-10 8:51 ` Willy Tarreau
2014-02-10 1:29 ` Ezequiel Garcia
2014-02-10 7:53 ` Richard Weinberger [this message]
2014-02-10 8:12 ` Ezequiel Garcia
2014-02-10 8:24 ` Artem Bityutskiy
2014-02-10 8:37 ` Willy Tarreau
2014-02-10 8:50 ` Ezequiel Garcia
2014-02-09 22:56 ` Richard Weinberger
2014-02-10 2:36 ` Ezequiel Garcia
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