From: "Jörn Engel" <joern@wohnheim.fh-wedel.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: David Woodhouse <dwmw2@infradead.org>,
MTD List <linux-mtd@lists.infradead.org>
Subject: Re: JFFS3 & performance
Date: Wed, 12 Jan 2005 21:06:08 +0100 [thread overview]
Message-ID: <20050112200608.GC7038@wohnheim.fh-wedel.de> (raw)
In-Reply-To: <1105559601.17853.300.camel@tglx.tec.linutronix.de>
On Wed, 12 January 2005 20:53:21 +0100, Thomas Gleixner wrote:
>
> Yes, but then we need the already discussed change in block handling and
> accounting, which allows us to handle blocks which consist of multiple
> subblocks, where one or more of the subblocks can be bad.
>
> The current code treats blocks with multiple subblocks in a way, that
> when one of the subblocks is or becomes bad, the whole block is treated
> as bad.
>
> So you mark e.g. 128MB bad, because one 16K sub block is bad. This is
> extra annoying on AG-AND where the bad block rate can be quite high.
Ouch! Well, combining blocks to groups makes sense in other scenarios
as well. With huge flashes, the number of blocks can also grow quite
large. And I wouldn't want to introduce rb_tree structures for the
blocks.
Hard problem, though.
Jörn
--
When I am working on a problem I never think about beauty. I think
only how to solve the problem. But when I have finished, if the
solution is not beautiful, I know it is wrong.
-- R. Buckminster Fuller
next prev parent reply other threads:[~2005-01-12 20:06 UTC|newest]
Thread overview: 196+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-11 12:29 JFFS3 & performance Artem B. Bityuckiy
2005-01-11 14:37 ` Josh Boyer
2005-01-11 21:51 ` Jörn Engel
2005-01-12 0:06 ` Thomas Gleixner
2005-01-12 16:59 ` Jörn Engel
2005-01-12 17:37 ` Thomas Gleixner
2005-01-12 18:17 ` Jörn Engel
2005-01-12 9:15 ` Artem B. Bityuckiy
2005-01-12 16:41 ` Jared Hulbert
2005-01-12 17:02 ` Jörn Engel
2005-01-12 17:06 ` David Woodhouse
2005-01-12 17:11 ` Jörn Engel
2005-01-12 17:22 ` Jared Hulbert
2005-01-12 17:28 ` Artem B. Bityuckiy
2005-01-12 17:34 ` David Woodhouse
2005-01-12 17:45 ` Dan Post
2005-01-12 17:52 ` David Woodhouse
2005-01-12 17:14 ` Artem B. Bityuckiy
2005-01-12 22:30 ` Jared Hulbert
2005-01-12 22:43 ` Josh Boyer
2005-01-12 22:55 ` Jared Hulbert
2005-01-13 15:50 ` Josh Boyer
2005-01-13 18:30 ` Jared Hulbert
2005-01-13 18:36 ` David Woodhouse
2005-01-13 19:06 ` Jörn Engel
2005-01-13 19:22 ` Josh Boyer
2005-01-13 18:55 ` Artem B. Bityuckiy
2005-01-13 19:10 ` Brian Fox
2005-01-13 19:23 ` Artem B. Bityuckiy
2005-01-28 6:08 ` Eric W. Biederman
2005-01-13 7:54 ` David Woodhouse
2005-01-13 8:25 ` Artem B. Bityuckiy
2005-01-13 15:09 ` Jörn Engel
2005-01-12 18:10 ` Jörn Engel
2005-01-12 18:27 ` Thomas Gleixner
2005-01-12 18:40 ` Jörn Engel
2005-01-12 18:42 ` David Woodhouse
2005-01-12 18:43 ` Artem B. Bityuckiy
2005-01-12 19:16 ` Thomas Gleixner
2005-01-12 19:44 ` Jörn Engel
2005-01-12 19:53 ` Thomas Gleixner
2005-01-12 20:06 ` Jörn Engel [this message]
2005-01-12 18:33 ` Artem B. Bityuckiy
2005-01-12 18:43 ` Jörn Engel
2005-01-12 18:45 ` Artem B. Bityuckiy
2005-01-12 18:58 ` Artem B. Bityuckiy
2005-01-12 19:50 ` Jörn Engel
2005-01-13 14:49 ` Artem B. Bityuckiy
2005-01-13 15:05 ` Artem B. Bityuckiy
2005-01-13 15:17 ` Jörn Engel
2005-01-13 15:22 ` Artem B. Bityuckiy
2005-01-13 15:40 ` Jörn Engel
2005-01-13 15:49 ` David Woodhouse
2005-01-13 15:53 ` Artem B. Bityuckiy
2005-01-13 16:13 ` Jörn Engel
2005-01-13 16:16 ` Artem B. Bityuckiy
2005-01-13 16:21 ` Jörn Engel
2005-01-13 16:22 ` Artem B. Bityuckiy
2005-01-13 16:21 ` Artem B. Bityuckiy
2005-01-14 13:46 ` Jamey Hicks
2005-01-14 14:16 ` Artem B. Bityuckiy
2005-01-18 15:50 ` Joakim Tjernlund
2005-01-19 13:07 ` Artem B. Bityuckiy
2005-01-19 15:24 ` Jörn Engel
2005-01-19 15:27 ` Artem B. Bityuckiy
2005-01-19 15:32 ` Jörn Engel
2005-01-19 15:51 ` Artem B. Bityuckiy
2005-01-19 16:31 ` Jörn Engel
2005-01-19 19:58 ` Artem B. Bityuckiy
2005-01-20 14:35 ` Jörn Engel
2005-01-20 14:37 ` David Woodhouse
2005-01-20 14:40 ` Jörn Engel
2005-01-20 15:05 ` Artem B. Bityuckiy
2005-01-20 15:27 ` Jörn Engel
2005-01-20 15:37 ` Artem B. Bityuckiy
2005-01-20 16:13 ` Jörn Engel
2005-01-20 16:31 ` Artem B. Bityuckiy
2005-01-20 16:41 ` Jörn Engel
2005-01-20 17:08 ` Artem B. Bityuckiy
2005-01-20 17:33 ` Jörn Engel
2005-01-20 17:57 ` Artem B. Bityuckiy
2005-01-21 12:44 ` Jörn Engel
2005-01-21 13:13 ` Artem B. Bityuckiy
2005-01-21 13:42 ` Jörn Engel
2005-01-21 13:52 ` Artem B. Bityuckiy
2005-01-21 14:00 ` Jörn Engel
2005-01-21 14:04 ` Artem B. Bityuckiy
2005-01-25 10:51 ` Jörn Engel
2005-01-25 10:56 ` David Woodhouse
2005-01-25 11:13 ` Jörn Engel
2005-01-21 14:30 ` Josh Boyer
2005-01-21 22:33 ` Jared Hulbert
2005-01-21 22:46 ` Jared Hulbert
2005-01-21 23:54 ` Josh Boyer
2005-01-22 13:03 ` Artem B. Bityuckiy
2005-01-22 22:04 ` David Woodhouse
2005-01-23 10:03 ` Artem B. Bityuckiy
2005-01-23 10:08 ` Artem B. Bityuckiy
2005-01-23 11:04 ` David Woodhouse
2005-01-23 11:55 ` Artem B. Bityuckiy
-- strict thread matches above, loose matches on Subject: below --
2004-12-16 13:20 Joakim Tjernlund
2004-12-16 14:27 ` Artem B. Bityuckiy
2004-12-16 14:45 ` Joakim Tjernlund
2004-12-16 14:50 ` Artem B. Bityuckiy
2004-12-16 15:00 ` Joakim Tjernlund
2004-12-16 17:53 ` Jörn Engel
2004-12-16 18:42 ` Artem B. Bityuckiy
2004-12-16 19:15 ` Jörn Engel
2004-12-16 19:49 ` Jörn Engel
2004-12-16 19:58 ` Joakim Tjernlund
2004-12-16 20:46 ` Jörn Engel
2004-12-16 20:02 ` Joakim Tjernlund
2004-12-16 20:37 ` Thomas Gleixner
2004-12-16 20:51 ` Jörn Engel
2004-12-16 21:02 ` Thomas Gleixner
2004-12-16 21:06 ` Joakim Tjernlund
2004-12-16 21:22 ` Jörn Engel
2004-12-16 22:06 ` Joakim Tjernlund
2004-12-17 10:25 ` Jörn Engel
2004-12-17 10:44 ` Joakim Tjernlund
2004-12-17 10:56 ` Artem B. Bityuckiy
2004-12-17 10:46 ` jasmine
2004-12-17 11:01 ` Artem B. Bityuckiy
2004-12-17 11:19 ` Joakim Tjernlund
2004-12-18 16:09 ` Jörn Engel
2004-12-18 16:26 ` Joakim Tjernlund
2004-12-18 16:52 ` Jörn Engel
2004-12-17 11:10 ` Joakim Tjernlund
2004-12-17 11:20 ` Artem B. Bityuckiy
2004-12-22 13:36 ` Artem B. Bityuckiy
2004-12-22 14:03 ` Jörn Engel
2004-12-22 14:44 ` Artem B. Bityuckiy
2004-12-22 15:14 ` Jörn Engel
2004-12-22 15:25 ` Artem B. Bityuckiy
2004-12-22 16:08 ` Jörn Engel
2004-12-22 20:22 ` xemc
2004-12-22 20:43 ` xemc
2004-12-22 20:49 ` Jasmine Strong
2004-12-22 15:30 ` Joakim Tjernlund
2004-12-22 15:37 ` Artem B. Bityuckiy
2004-12-22 15:47 ` Joakim Tjernlund
2004-12-22 15:56 ` Artem B. Bityuckiy
2004-12-22 16:09 ` Jörn Engel
2004-12-22 16:17 ` Artem B. Bityuckiy
2004-12-22 16:43 ` Joakim Tjernlund
2004-12-22 16:46 ` Artem B. Bityuckiy
2004-12-22 17:26 ` Jörn Engel
2004-12-22 18:14 ` xemc
2004-12-22 18:20 ` Artem B. Bityuckiy
2004-12-23 13:52 ` Jörn Engel
2004-12-23 17:02 ` Artem B. Bityuckiy
2005-01-07 11:10 ` Artem B. Bityuckiy
2005-01-07 11:09 ` David Woodhouse
2005-01-07 11:27 ` jasmine
2005-01-07 11:43 ` Artem B. Bityuckiy
2005-01-07 14:23 ` Artem B. Bityuckiy
2005-01-07 14:27 ` jasmine
2005-01-07 14:33 ` Artem B. Bityuckiy
2005-01-07 14:37 ` jasmine
2005-01-07 14:43 ` Artem B. Bityuckiy
2005-01-07 14:55 ` jasmine
2005-01-07 15:20 ` Artem B. Bityuckiy
2005-01-07 15:24 ` jasmine
2005-01-07 15:28 ` Artem B. Bityuckiy
2005-01-07 15:31 ` jasmine
2005-01-07 15:32 ` Artem B. Bityuckiy
2005-01-07 17:57 ` Artem B. Bityuckiy
2005-01-07 14:50 ` Artem B. Bityuckiy
2005-01-07 14:31 ` Artem B. Bityuckiy
2005-01-06 10:08 ` Artem B. Bityuckiy
2005-01-08 20:14 ` Jörn Engel
2005-01-09 11:39 ` Artem B. Bityuckiy
2005-01-10 14:24 ` Jörn Engel
2004-12-22 15:59 ` jasmine
2004-12-22 16:19 ` Jörn Engel
2004-12-22 16:21 ` Artem B. Bityuckiy
2004-12-22 15:56 ` Jörn Engel
2004-12-22 16:39 ` Joakim Tjernlund
2004-12-22 17:33 ` Jörn Engel
2004-12-17 11:20 ` Jörn Engel
2004-12-18 12:23 ` Artem B. Bityuckiy
2004-12-21 14:45 ` Artem B. Bityuckiy
2004-12-21 16:03 ` Jörn Engel
2004-12-17 11:33 ` David Vrabel
2004-12-17 15:34 ` Joakim Tjernlund
2004-12-18 16:14 ` Jörn Engel
2004-12-18 16:25 ` Joakim Tjernlund
2004-12-18 16:39 ` Jörn Engel
2004-12-18 17:10 ` Joakim Tjernlund
2004-12-18 17:19 ` Jörn Engel
2004-12-18 17:51 ` Joakim Tjernlund
2004-12-18 17:59 ` Jörn Engel
2004-12-18 18:13 ` Joakim Tjernlund
2004-12-19 3:05 ` Jörn Engel
2004-12-18 18:09 ` Joakim Tjernlund
2004-12-21 14:38 ` Jörn Engel
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