linux-kernel - RE: [f2fs-dev] [PATCH 2/6] f2fs: convert inline_data for punch

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Date:	Mon, 06 Jan 2014 16:41:53 +0900
From:	Jaegeuk Kim <jaegeuk.kim@...sung.com>
To:	Chao Yu <chao2.yu@...sung.com>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: RE: [f2fs-dev] [PATCH 2/6] f2fs: convert inline_data for punch_hole

Hi,

2013-12-31 (화), 14:08 +0800, Chao Yu:
> Hi,
> 
> One comment as following.
> 
> > -----Original Message-----
> > From: Jaegeuk Kim [mailto:jaegeuk.kim@...sung.com]
> > Sent: Friday, December 27, 2013 12:00 PM
> > Cc: linux-fsdevel@...r.kernel.org; linux-kernel@...r.kernel.org; linux-f2fs-devel@...ts.sourceforge.net
> > Subject: [f2fs-dev] [PATCH 2/6] f2fs: convert inline_data for punch_hole
> > 
> > In the punch_hole(), let's convert inline_data all the time for simplicity and
> > to avoid potential deadlock conditions.
> > It is pretty much not a big deal to do this.
> > 
> > Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
> 
> Reviewed-by: Chao Yu <chao2.yu@...sung.com>
> 
> > ---
> >  fs/f2fs/file.c | 22 +++-------------------
> >  1 file changed, 3 insertions(+), 19 deletions(-)
> > 
> > diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> > index 7ef2d6a..f64a1c8 100644
> > --- a/fs/f2fs/file.c
> > +++ b/fs/f2fs/file.c
> > @@ -462,25 +462,9 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
> >  	loff_t off_start, off_end;
> >  	int ret = 0;
> > 
> > -	if (f2fs_has_inline_data(inode)) {
> > -		struct page *page;
> > -		unsigned flags = AOP_FLAG_NOFS;
> > -		page = grab_cache_page_write_begin(inode->i_mapping, 0, flags);
> > -		if (IS_ERR(page))
> > -			return PTR_ERR(page);
> 
> We use following code because grab_cache_page_write_begin only use
> NULL value as its error number.

Right. :)
Applied to the following patch:
f2fs: refactor f2fs_convert_inline_data.

Thanks,

-- 
Jaegeuk Kim
Samsung

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