linux-kernel - Re: [f2fs-dev] [PATCH RESEND] f2fs: maintain extent cache in separated file

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Date:	Tue, 14 Jul 2015 12:19:58 -0700
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	Chao Yu <chao2.yu@...sung.com>
Cc:	linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	Fan Li <fanofcode.li@...sung.com>
Subject: Re: [f2fs-dev] [PATCH RESEND] f2fs: maintain extent cache in
 separated file

On Tue, Jul 14, 2015 at 06:10:50PM +0800, Chao Yu wrote:
> Hi Jaegeuk,
> 
> > -----Original Message-----
> > From: Chao Yu [mailto:yuchaochina@...mail.com]
> > Sent: Thursday, July 09, 2015 12:16 AM
> > To: 'Jaegeuk Kim'
> > Cc: linux-kernel@...r.kernel.org; linux-f2fs-devel@...ts.sourceforge.net
> > Subject: Re: [f2fs-dev] [PATCH RESEND] f2fs: maintain extent cache in separated file
> > 
> > >From 8956df8fa1a669e8e476456e4afe0eccd8174684 Mon Sep 17 00:00:00 2001
> > From: Chao Yu <chao2.yu@...sung.com>
> > Date: Wed, 8 Jul 2015 20:49:05 +0800
> > Subject: [PATCH] f2fs: maintain extent cache in separated file
> > 
> > This patch moves extent cache related code from data.c into extent_cache.c
> > since extent cache is independent feature, and its codes are not relate to
> > others in data.c, it's better for us to maintain them in separated place.
> > 
> > There is no functionality change, but several small coding style fixes
> > including:
> > * rename __drop_largest_extent to f2fs_drop_largest_extent for exporting;
> > * rename misspelled word 'untill' to 'until';
> > * remove unneeded 'return' in the end of f2fs_destroy_extent_tree().
> > 
> 
> I think commit 0b84ceec9891 ("f2fs: don't try to split extents shorter than
> F2FS_MIN_EXTENT_LEN") is conflict with commit 392a1c419916 ("f2fs: maintain
> extent cache in separated file"), and it's not well resolved in dev-test.
> 
> in commit 392a1c419916 ("f2fs: maintain extent cache in separated file"):
> 
> - if (dei.len > F2FS_MIN_EXTENT_LEN) {
> 
> + if (dei.len > 1) {

Good catch.
Not a big deal, so I just resolved that in this patch. :)

Thanks,

> 
> So how about merging this patch (f2fs: maintain extent cache in separated file)
> first, and then merge Fan's patch? because one line modification in extent_cache.c
> for fixing conflict seems much easier.
> 
> BTW, I have already fixed the building error in this patch, you can directly
> use the last sent patch in this thread showed in below link. :)
> 
> http://sourceforge.net/p/linux-f2fs/mailman/message/34277570/
> 
> Thanks,
--
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