linux-kernel - Re: [PATCH 1/4] mm: cleancache: s/flush/invalidate/

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Date:	Fri, 13 Jan 2012 12:43:06 -0500
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Seth Jennings <sjenning@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Jan Beulich <JBeulich@...ell.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Hugh Dickins <hughd@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Nitin Gupta <ngupta@...are.org>,
	Matthew Wilcox <matthew@....cx>,
	Chris Mason <chris.mason@...cle.com>,
	Rik Riel <riel@...hat.com>
Subject: Re: [PATCH 1/4] mm: cleancache: s/flush/invalidate/

On Fri, Jan 13, 2012 at 09:16:33AM -0600, Seth Jennings wrote:
> Hey Konrad,
> 
> On 01/12/2012 02:36 PM, Konrad Rzeszutek Wilk wrote:
> > From: Dan Magenheimer <dan.magenheimer@...cle.com>
> > 
> > Per akpm suggestions alter the use of the term flush to be
> > invalidate. The next patch will do this across all MM.
> > 
> > This change is completely cosmetic.
> > 
> > [v9: akpm@...ux-foundation.org: change "flush" to "invalidate", part 3]
> > 
> > Signed-off-by: Dan Magenheimer <dan.magenheimer@...cle.com>
> > Reviewed-by: Konrad Wilk <konrad.wilk@...cle.com>
> > Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> > Cc: Jan Beulich <JBeulich@...ell.com>
> > Cc: Seth Jennings <sjenning@...ux.vnet.ibm.com>
> > Cc: Jeremy Fitzhardinge <jeremy@...p.org>
> > Cc: Hugh Dickins <hughd@...gle.com>
> > Cc: Johannes Weiner <hannes@...xchg.org>
> > Cc: Nitin Gupta <ngupta@...are.org>
> > Cc: Matthew Wilcox <matthew@....cx>
> > Cc: Chris Mason <chris.mason@...cle.com>
> > Cc: Rik Riel <riel@...hat.com>
> > Cc: Andrew Morton <akpm@...ux-foundation.org>
> > [v10: Fixed  fs: move code out of buffer.c conflict change]
> > Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> > ---
> >  Documentation/vm/cleancache.txt |   37 +++++++++++++++++++------------------
> >  fs/block_dev.c                  |    2 +-
> >  fs/super.c                      |    2 +-
> >  include/linux/cleancache.h      |   23 ++++++++++++++---------
> >  mm/cleancache.c                 |   19 ++++++++++---------
> >  mm/filemap.c                    |    2 +-
> >  mm/truncate.c                   |   10 +++++-----
> >  7 files changed, 51 insertions(+), 44 deletions(-)
> snip
> > diff --git a/fs/block_dev.c b/fs/block_dev.c
> > index 69a5b6f..d6d5f29 100644
> > --- a/fs/block_dev.c
> > +++ b/fs/block_dev.c
> > @@ -110,7 +110,7 @@ void invalidate_bdev(struct block_device *bdev)
> >  	/* 99% of the time, we don't need to flush the cleancache on the bdev.
> >  	 * But, for the strange corners, lets be cautious
> >  	 */
> > -	cleancache_flush_inode(mapping);
> > +	cleancache_invalidate_inode(mapping);
> >  }
> >  EXPORT_SYMBOL(invalidate_bdev);
> 
> This hunk doesn't merge cleanly because there is no existing
> cleancache code in fs/block_dev.c in v3.2 or any previous version.

Hm, I am at 099469502f62fbe0d7e4f0b83a2f22538367f734 and I see
that file with "cleancache_flush_inode" ?

This is against v3.3-rc0, not 3.2.
> 
> Looking at the git log, doesn't look like any cleancache code was
> ever merged into this file.

It was merged in buffer.c and invalidate_bdev got moved to
fs/block_dev.c
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