linux-kernel - Re: [f2fs-dev] [PATCH 2/2] f2fs: do checkpoint when umount flag is not set

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Message-ID: <20150123190349.GB22493@jaegeuk-mac02.mot.com>
Date:	Fri, 23 Jan 2015 11:03:49 -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 2/2] f2fs: do checkpoint when umount flag is
 not set

On Fri, Jan 23, 2015 at 06:39:25PM +0800, Chao Yu wrote:
> > -----Original Message-----
> > From: Jaegeuk Kim [mailto:jaegeuk@...nel.org]
> > Sent: Friday, January 23, 2015 8:09 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 2/2] f2fs: do checkpoint when umount flag is not set
> > 
> > If the previous checkpoint was done without CP_UMOUNT flag, it needs to do
> > checkpoint with CP_UMOUNT for the next fast boot.
> > 
> > Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> 
> Reviewed-by: Chao Yu <chao2.yu@...sung.com>
> 
> > ---
> >  fs/f2fs/checkpoint.c | 3 ++-
> >  fs/f2fs/super.c      | 3 ++-
> >  2 files changed, 4 insertions(+), 2 deletions(-)
> > 
> > diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> > index 9f5317c..231d8c9 100644
> > --- a/fs/f2fs/checkpoint.c
> > +++ b/fs/f2fs/checkpoint.c
> > @@ -1043,7 +1043,8 @@ void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> > 
> >  	mutex_lock(&sbi->cp_mutex);
> > 
> > -	if (!sbi->s_dirty && cpc->reason != CP_DISCARD)
> > +	if (!sbi->s_dirty &&
> > +			cpc->reason != CP_DISCARD && cpc->reason != CP_UMOUNT)
> >  		goto out;
> >  	if (unlikely(f2fs_cp_error(sbi)))
> >  		goto out;
> > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> > index 84f95cd..6ef1458 100644
> > --- a/fs/f2fs/super.c
> > +++ b/fs/f2fs/super.c
> > @@ -448,7 +448,8 @@ static void f2fs_put_super(struct super_block *sb)
> >  	stop_gc_thread(sbi);
> > 
> >  	/* We don't need to do checkpoint when it's clean */
> 
> Better to update the annotation above.

Added some comments. :)

Thanks,

> 
> Thanks,
> Yu
> 
> > -	if (sbi->s_dirty) {
> > +	if (sbi->s_dirty ||
> > +			!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_UMOUNT_FLAG)) {
> >  		struct cp_control cpc = {
> >  			.reason = CP_UMOUNT,
> >  		};
> > --
> > 2.1.1
> > 
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