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* JFFS2 on eCos
@ 2006-05-25 23:27 David Woodhouse
  2006-05-26  9:55 ` Gary Thomas
  0 siblings, 1 reply; 8+ messages in thread
From: David Woodhouse @ 2006-05-25 23:27 UTC (permalink / raw)
  To: ecos-devel

Is anyone still interested in JFFS2 on eCos? I've just committed a bunch
of improvements to mount time and memory usage, and I'm hoping that
someone will step forward to update and look after the eCos port.

We've abandoned the CVS repository which was used for development of
JFFS2, and we're doing JFFS2 development in a git tree based on the
Linux kernel (http://git.infradead.org/?p=mtd-2.6.git)

This means that the eCos code is no longer in CVS right next to the
Linux version. We used to have a 'mkepk.sh' script which would create an
epk from what's in CVS -- perhaps we could replace that with a git
repository which automatically pulls in core JFFS2 changes from the
Linux tree, but also contains the eCos files. I'm happy enough to give
accounts to whoever steps forward as JFFS2/eCos maintainers to do
something like that on git.infradead.org, or give whatever assistance is
otherwise useful.

-- 
dwmw2

^ permalink raw reply	[flat|nested] 8+ messages in thread
* 答复: JFFS2 on eCos
@ 2006-05-29  2:15 Chi Xiaobo
  2006-05-29 14:41 ` David Woodhouse
  0 siblings, 1 reply; 8+ messages in thread
From: Chi Xiaobo @ 2006-05-29  2:15 UTC (permalink / raw)
  To: David Woodhouse, Gary Thomas; +Cc: ecos-devel

Hi, david, do you need more than one guy to do this? I am also interesting in this.

Scott chi

-----邮件原件-----
发件人: ecos-devel-owner@ecos.sourceware.org [mailto:ecos-devel-owner@ecos.sourceware.org] 代表 David Woodhouse
发送时间: 2006年5月26日 21:01
收件人: Gary Thomas
抄送: ecos-devel@sources.redhat.com
主题: Re: JFFS2 on eCos

On Fri, 2006-05-26 at 03:55 -0600, Gary Thomas wrote:
> Put my head on the block :-)  Tell me what needs to be done and how
> and I'll make sure it happens. 

OK, thanks.... I'll give you a quick overview of what we have, and what
needs doing.

When we first did the eCos port, I split Linux-specific stuff from
'core' JFFS2 code, putting them into separate files in the CVS tree.
We added an 'ecos' subdirectory, containing jffs2.cdl and the
eCos-specific files to match the Linux ones. I think you've seen all
that anyway.

What I need primarily is someone to take overall responsibility for
keeping the eCos files up to date when we change stuff that affects them
-- and to keep them up to date with eCos itself. Presumably also to
merge JFFS2 code into the eCos tree.

That task doesn't have to be all coding -- it can also include LARTing
me (and other JFFS2 developers) if/when we break the eCos build without
reason, without fixing up the eCos side ourselves, and/or without at
least giving you a heads-up.

(For example, if you refer to the changes I've made in the git tree in
the last few days, I would expect a kicking for putting the new
jffs2_prealloc_raw_node_refs() function into malloc.c, which is an
OS-specific file, instead of putting it into a shared file. It's a
function which should be the same in both cases. I'll fix that.)

How you do this technically is ultimately up to you. What I'd probably
suggest is that we should keep the eCos version on git.infradead.org, so
it is immediately to hand and you can quite reasonably expect people to
keep it working. With a little bit of git hacking, we should be able to
set up a git tree which contains just the OS-independent files, and
which inherits changes automatically from the main mtd-2.6.git tree.
Then we can do a git tree for the eCos version which merges from that as
and when appropriate.

If that's how you want to do it, I'll go and set up the script to do
that JFFS2-only tree, and set up the eCos repository based on that and
the latest version of the eCos-specific files from CVS.


Aside from setting that up, what needs doing right now is to make it
build on eCos again, since I assume it doesn't. Take the JFFS2 files
from the mtd-2.6.git tree, add the latest eCos files (which were last
updated in July of last year), and make them work.

You might benefit from doing that incrementally -- perhaps starting with
the version in the 2.6.16 kernel, which is before all the changes I've
just made, but _after_ the introduction of the 'erase block summary'
code. Alternatively, you might prefer just to do it all in one fell
swoop with the current code. 

-- 
dwmw2

^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2006-06-21 13:25 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-05-25 23:27 JFFS2 on eCos David Woodhouse
2006-05-26  9:55 ` Gary Thomas
2006-05-26 13:02   ` David Woodhouse
2006-05-29 14:32     ` David Woodhouse
2006-05-29 17:29       ` David Woodhouse
2006-06-21 13:21       ` David Woodhouse
2006-06-21 13:25         ` Gary Thomas
2006-05-29  2:15 答复: " Chi Xiaobo
2006-05-29 14:41 ` David Woodhouse

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