linux-kernel - Re: [f2fs-dev] [PATCH] f2fs: should unset atomic flag after successful commit

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Message-ID: <20160111233219.GA32106@jaegeuk.granlibakkenguest>
Date:	Mon, 11 Jan 2016 15:32:19 -0800
From:	Jaegeuk Kim <jaegeuk@...nel.org>
To:	Chao Yu <chao2.yu@...sung.com>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: should unset atomic flag after
 successful commit

Hi Chao,

On Mon, Jan 11, 2016 at 03:25:11PM +0800, Chao Yu wrote:
> Hi Jaegeuk,
> 
> > -----Original Message-----
> > From: Jaegeuk Kim [mailto:jaegeuk@...nel.org]
> > Sent: Sunday, January 10, 2016 9:10 AM
> > To: linux-kernel@...r.kernel.org; linux-fsdevel@...r.kernel.org;
> > linux-f2fs-devel@...ts.sourceforge.net
> > Cc: Jaegeuk Kim
> > Subject: [f2fs-dev] [PATCH] f2fs: should unset atomic flag after successful commit
> > 
> > If there is an error during commit, we should keep the flag in order to
> > abort it.
> > 
> > Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> > ---
> >  fs/f2fs/file.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> > index dfaed51..db0b2cb 100644
> > --- a/fs/f2fs/file.c
> > +++ b/fs/f2fs/file.c
> > @@ -1374,10 +1374,10 @@ static int f2fs_ioc_commit_atomic_write(struct file *filp)
> >  		return ret;
> > 
> >  	if (f2fs_is_atomic_file(inode)) {
> > -		clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
> 
> It was added in 6282adbf932c ("f2fs: call set_page_dirty to attach i_wb for
> cgroup ") to avoid panic in kernel with writeback supported cgroup. We
> should keep it here.
> 
> >  		ret = commit_inmem_pages(inode, false);
> >  		if (ret)
> >  			goto err_out;
> > +		clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
> 
> How about setting atomic flag if there occurs an error during committing.

Got your point.
Thanks,

> 
> Thanks,
> 
> >  	}
> > 
> >  	ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0);
> > --
> > 2.6.3
> > 
> > 
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