linux-kernel - Re: LogFS merge

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Message-ID: <20080502214704.GF24080@logfs.org>
Date:	Fri, 2 May 2008 23:47:04 +0200
From:	Jörn Engel <joern@...fs.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...l.org>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org
Subject: Re: LogFS merge

On Fri, 2 May 2008 18:52:21 +0200, Arnd Bergmann wrote:
> 
> There are still a few i's and t's left to dot and cross:
> 
> * the changeset comments needs a Signed-off-by: line

Doh!  When sending patches that happens automatically.  I should teach
git the same trick.

> * The MAINTAINERS file should list your name and logfs mailing list

Definitely.

> * you have a few instances of '#if LINUX_VERSION_CODE > 
>   KERNEL_VERSION(2, 6, 23)', that should go away for the merge

Yes.  I would like to keep the merge version roughly in sync with the
external patch, at least for a while.  Not sure how to deal with one
needing the multi-version hackery and the other not wanting it.

> * The copyright notice says 2005-2007, it should probably be 2005-2008

On most files, yes.

> * You may want to add a Documentation/filesystems/logfs.txt file explaining
>   the supported mount options.

Sure.  I don't have any logfs-specific ones yet, but even that fact
should be made explicit.

> * CONFIG_LOGFS should be tristate, not bool. Unfortunately, you are still
>   using three symbols that are not exported: swapper_space (through
>   BUG_ON(!page_mapping(page)->a_ops->set_page_dirty)), add_to_page_cache_lru
>  and inode_lock. Not sure what to do about this.

inode_lock will get fixed.  The BUG_ON could get removed.  Not sure
about add_to_page_cache_lru yet.

> * You should really make sure the version you check in compiles, 
>   fs/logfs/logfs.h is missing an #endif. ;-)

Making a merge dash whilst moving is not always the wisest choice. ;)

> Otherwise, I don't see any reasons why logfs shouldn't go in. The code is
> clean, feature-complete, and there is demand for it. The main question
> I can still see is the timing with the merge window. It's almost closed,
> so if logfs doesn't go in really soon, it should probably wait for the
> 2.6.27 window.

2.6.27 appears to make more sense, yes.

> This patch fixes some of the problems mentined above.

Excellent!  Thanks a bunch!

> +L:	logfs@...fs.org

I believe it is currently subscribers-only with the usual bounces
everyone holds so dear.  I should change that and add a spam filter to
make it bearable.

Jörn

-- 
The only real mistake is the one from which we learn nothing.
-- John Powell
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