From: Artem Bityutskiy <dedekind1@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: david.wagner@free-electrons.com,
linux-mtd <linux-mtd@lists.infradead.org>,
linux-embedded <linux-embedded@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
Tim Bird <tim.bird@am.sony.com>,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCHv3] UBI: new module ubiblk: block layer on top of UBI
Date: Tue, 06 Sep 2011 07:29:51 +0300 [thread overview]
Message-ID: <1315283397.19067.37.camel@sauron> (raw)
In-Reply-To: <1315282208.19067.24.camel@sauron>
On Tue, 2011-09-06 at 07:10 +0300, Artem Bityutskiy wrote:
> On Tue, 2011-09-06 at 06:44 +0300, Artem Bityutskiy wrote:
> > > It's not a dummy bus, in this approach it would be a the bus that gets
> > > used by all ubiblk devices, which is a very common concept by itself.
> > > It's more like the classic understanding of a 'device class' that Greg
> > > wants to see get replaced by bus_types in the kernel.
> >
> > Yes, this sounds OK. Although UBI already has notifiers, so we could
> > just add 2 more events.
>
> Hmm, with notifications the error handling becomes a problem - we want
> the ioctls for creating/removing the block device to be synchronous,
> and, should an error occur, we want to return the error code to the
> user-space. So the existing notifications mechanism does not work well.
... but we can change it a little and have error codes handling, this is
just UB implementation issues.
--
Best Regards,
Artem Bityutskiy
WARNING: multiple messages have this Message-ID (diff)
From: Artem Bityutskiy <dedekind1@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linux-embedded <linux-embedded@vger.kernel.org>,
david.wagner@free-electrons.com,
lkml <linux-kernel@vger.kernel.org>,
linux-mtd <linux-mtd@lists.infradead.org>,
Tim Bird <tim.bird@am.sony.com>,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCHv3] UBI: new module ubiblk: block layer on top of UBI
Date: Tue, 06 Sep 2011 07:29:51 +0300 [thread overview]
Message-ID: <1315283397.19067.37.camel@sauron> (raw)
In-Reply-To: <1315282208.19067.24.camel@sauron>
On Tue, 2011-09-06 at 07:10 +0300, Artem Bityutskiy wrote:
> On Tue, 2011-09-06 at 06:44 +0300, Artem Bityutskiy wrote:
> > > It's not a dummy bus, in this approach it would be a the bus that gets
> > > used by all ubiblk devices, which is a very common concept by itself.
> > > It's more like the classic understanding of a 'device class' that Greg
> > > wants to see get replaced by bus_types in the kernel.
> >
> > Yes, this sounds OK. Although UBI already has notifiers, so we could
> > just add 2 more events.
>
> Hmm, with notifications the error handling becomes a problem - we want
> the ioctls for creating/removing the block device to be synchronous,
> and, should an error occur, we want to return the error code to the
> user-space. So the existing notifications mechanism does not work well.
... but we can change it a little and have error codes handling, this is
just UB implementation issues.
--
Best Regards,
Artem Bityutskiy
next prev parent reply other threads:[~2011-09-06 4:29 UTC|newest]
Thread overview: 118+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-24 13:34 [RFC] ubiblk: read-only block layer on top of UBI david.wagner
2011-06-24 13:34 ` david.wagner
2011-06-24 13:34 ` [PATCH] UBI: new module ubiblk: " david.wagner
2011-06-24 13:34 ` david.wagner
2011-06-27 19:26 ` Artem Bityutskiy
2011-06-27 19:26 ` Artem Bityutskiy
2011-06-28 11:35 ` David Wagner
2011-06-28 11:35 ` David Wagner
2011-06-29 6:52 ` Artem Bityutskiy
2011-06-29 6:52 ` Artem Bityutskiy
2011-06-28 14:50 ` Matthieu CASTET
2011-06-28 14:50 ` Matthieu CASTET
2011-06-28 15:32 ` David Wagner
2011-06-28 15:32 ` David Wagner
2011-06-29 6:25 ` Artem Bityutskiy
2011-06-29 6:25 ` Artem Bityutskiy
2011-06-24 13:45 ` [Addendum][RFC] ubiblk: read-only " David Wagner
2011-06-27 19:14 ` [RFC] " Artem Bityutskiy
2011-06-27 19:14 ` Artem Bityutskiy
2011-06-28 15:24 ` [RFC PATCHv2] UBI: new module ubiblk: " david.wagner
2011-06-28 15:24 ` david.wagner
2011-06-28 15:24 ` david.wagner
2011-06-29 6:54 ` Artem Bityutskiy
2011-06-29 6:54 ` Artem Bityutskiy
2011-07-26 12:27 ` [PATCH] " David Wagner
2011-07-26 12:27 ` David Wagner
2011-07-26 12:34 ` Christoph Hellwig
2011-07-26 12:34 ` Christoph Hellwig
2011-07-26 12:34 ` Christoph Hellwig
2011-07-26 12:58 ` David Wagner
2011-07-26 12:58 ` David Wagner
2011-07-28 6:14 ` Artem Bityutskiy
2011-07-28 6:14 ` Artem Bityutskiy
2011-08-15 11:56 ` Artem Bityutskiy
2011-08-15 11:56 ` Artem Bityutskiy
2011-08-17 13:17 ` [PATCHv3] " david.wagner
2011-08-17 13:17 ` david.wagner
2011-08-17 14:20 ` [PATCH] Tools for controling ubiblk David Wagner
2011-08-17 14:20 ` David Wagner
2011-08-22 8:17 ` Artem Bityutskiy
2011-08-22 8:17 ` Artem Bityutskiy
2011-08-22 7:39 ` [PATCHv3] UBI: new module ubiblk: block layer on top of UBI Artem Bityutskiy
2011-08-22 7:39 ` Artem Bityutskiy
2011-08-22 7:42 ` Artem Bityutskiy
2011-08-22 7:42 ` Artem Bityutskiy
2011-08-24 16:23 ` Arnd Bergmann
2011-08-24 16:23 ` Arnd Bergmann
2011-08-25 7:06 ` Artem Bityutskiy
2011-08-25 7:06 ` Artem Bityutskiy
2011-08-25 15:12 ` Arnd Bergmann
2011-08-25 15:12 ` Arnd Bergmann
2011-08-25 15:12 ` Arnd Bergmann
2011-09-01 12:55 ` David Wagner
2011-09-01 12:55 ` David Wagner
2011-09-01 12:55 ` David Wagner
2011-09-06 3:44 ` Artem Bityutskiy
2011-09-06 3:44 ` Artem Bityutskiy
2011-09-06 4:10 ` Artem Bityutskiy
2011-09-06 4:10 ` Artem Bityutskiy
2011-09-06 4:10 ` Artem Bityutskiy
2011-09-06 4:29 ` Artem Bityutskiy [this message]
2011-09-06 4:29 ` Artem Bityutskiy
2011-09-08 15:26 ` Arnd Bergmann
2011-09-08 15:26 ` Arnd Bergmann
2011-09-08 15:26 ` Arnd Bergmann
2011-09-09 11:53 ` Artem Bityutskiy
2011-09-09 11:53 ` Artem Bityutskiy
2011-09-09 12:02 ` Artem Bityutskiy
2011-09-09 12:02 ` Artem Bityutskiy
2011-09-09 14:25 ` Arnd Bergmann
2011-09-09 14:25 ` Arnd Bergmann
2011-09-09 15:27 ` Artem Bityutskiy
2011-09-09 15:27 ` Artem Bityutskiy
2011-09-09 14:41 ` David Wagner
2011-09-09 14:41 ` David Wagner
2011-09-09 14:41 ` David Wagner
2011-09-09 14:51 ` Arnd Bergmann
2011-09-09 14:51 ` Arnd Bergmann
2011-09-11 10:18 ` Artem Bityutskiy
2011-09-11 10:18 ` Artem Bityutskiy
2011-09-11 10:18 ` Artem Bityutskiy
2011-09-11 10:35 ` David Wagner
2011-09-11 10:35 ` David Wagner
2011-08-24 16:15 ` [PATCHv4] " david.wagner
2011-08-24 16:15 ` david.wagner
2011-08-24 16:21 ` [PATCH] document ubiblk's usage of the same ioctl magic as a part " David Wagner
2011-08-24 16:21 ` David Wagner
2011-09-06 4:58 ` Artem Bityutskiy
2011-09-06 4:58 ` Artem Bityutskiy
2011-09-06 4:55 ` [PATCHv4] UBI: new module ubiblk: block layer on top " Artem Bityutskiy
2011-09-06 4:55 ` Artem Bityutskiy
2011-09-12 9:51 ` [PATCHv5] " David Wagner
2011-09-12 9:51 ` David Wagner
2011-09-12 9:51 ` David Wagner
2011-09-19 4:50 ` Artem Bityutskiy
2011-09-19 4:50 ` Artem Bityutskiy
2011-09-22 7:58 ` [PATCHv6] " David Wagner
2011-09-22 7:58 ` David Wagner
2011-09-23 10:58 ` Artem Bityutskiy
2011-09-23 10:58 ` Artem Bityutskiy
2011-09-26 12:58 ` David Wagner
2011-09-26 12:58 ` David Wagner
2011-09-26 9:17 ` Ricard Wanderlof
2011-09-26 9:17 ` Ricard Wanderlof
2011-09-26 9:17 ` Ricard Wanderlof
2011-09-26 12:11 ` Ricard Wanderlof
2011-09-26 12:38 ` [PATCHv7] " David Wagner
2011-09-26 12:38 ` David Wagner
2011-09-26 13:20 ` Artem Bityutskiy
2011-09-26 13:20 ` Artem Bityutskiy
2011-09-26 14:25 ` [PATCHv8] " David Wagner
2011-09-26 14:25 ` David Wagner
2011-09-26 14:36 ` Artem Bityutskiy
2011-09-26 14:36 ` Artem Bityutskiy
2011-09-26 14:40 ` [PATCHv9] " David Wagner
2011-09-26 14:40 ` David Wagner
2011-10-01 14:08 ` Artem Bityutskiy
2011-10-01 14:08 ` Artem Bityutskiy
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