From: Chao Yu <chao2.yu@samsung.com>
To: "'Jaegeuk Kim'" <jaegeuk@kernel.org>
Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
References: <000001d137c2$05ff5e20$11fe1a60$@samsung.com>
 <20151216173717.GB74292@jaegeuk.local>
In-reply-to: <20151216173717.GB74292@jaegeuk.local>
Subject: RE: [PATCH v2 5/7] f2fs: stat dirty regular/symlink inodes
Date: Thu, 17 Dec 2015 10:43:25 +0800
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Hi Jaegeuk,

> -----Original Message-----
> From: Jaegeuk Kim [mailto:jaegeuk@kernel.org]
> Sent: Thursday, December 17, 2015 1:37 AM
> To: Chao Yu
> Cc: linux-f2fs-devel@lists.sourceforge.net; linux-kernel@vger.kernel.org
> Subject: Re: [PATCH v2 5/7] f2fs: stat dirty regular/symlink inodes
> 
> Hi Chao,
> 
> We need to change this patch to avoid build warnings.
> 
> On Wed, Dec 16, 2015 at 01:23:44PM +0800, Chao Yu wrote:
> > Add to stat dirty regular and symlink inode for showing in debugfs.
> >
> > Signed-off-by: Chao Yu <chao2.yu@samsung.com>
> > ---
> > v2:
> >  - rename F2FS_DIRTY_DATAS to F2FS_DIRTY_DATA
> > ---
> >  fs/f2fs/checkpoint.c | 4 ++++
> >  fs/f2fs/debug.c      | 4 ++++
> >  fs/f2fs/f2fs.h       | 8 +++++++-
> >  3 files changed, 15 insertions(+), 1 deletion(-)
> >
> > diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> > index f33c4d7..b2af2c16 100644
> > --- a/fs/f2fs/checkpoint.c
> > +++ b/fs/f2fs/checkpoint.c
> > @@ -735,6 +735,8 @@ static void __add_dirty_inode(struct inode *inode, enum inode_type type)
> >  	list_add_tail(&fi->dirty_list, &sbi->inode_list[type]);
> >  	if (type == DIR_INODE)
> >  		stat_inc_dirty_dir(sbi);
> > +	else
> > +		stat_inc_dirty_file(sbi);
> 
> If we don't set F2FS_STAT_FS, this causes unreferenced sbi.
> 
> How about something like this?
> 
>    stat_inc_dirty_inode(F2FS_I_SB(inode), type);
> 
> #ifdef
>    stat_inc_dirty_inode(sbi, type) (sbi)->ndirty_inode[type]++;
>    stat_dec_dirty_inode(sbi, type) (sbi)->ndirty_inode[type]--;
> #else
>    stat_inc_dirty_inode
>    stat_dec_dirty_inode
> #endif

More neat, will do. :)

Thanks,

> 
> >  }
> >
> >  static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
> > @@ -751,6 +753,8 @@ static void __remove_dirty_inode(struct inode *inode, enum inode_type
> type)
> >  	clear_inode_flag(fi, flag);
> >  	if (type == DIR_INODE)
> >  		stat_dec_dirty_dir(sbi);
> > +	else
> > +		stat_dec_dirty_file(sbi);
> 
> 
>    stat_dec_dirty_inode(F2FS_I_SB(inode), type);
> 
> >  }
> >
> >  void update_dirty_page(struct inode *inode, struct page *page)
> > diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
> > index f4a7b9e..780d5ed1 100644
> > --- a/fs/f2fs/debug.c
> > +++ b/fs/f2fs/debug.c
> > @@ -42,7 +42,9 @@ static void update_general_status(struct f2fs_sb_info *sbi)
> >  	si->ext_node = atomic_read(&sbi->total_ext_node);
> >  	si->ndirty_node = get_pages(sbi, F2FS_DIRTY_NODES);
> >  	si->ndirty_dent = get_pages(sbi, F2FS_DIRTY_DENTS);
> > +	si->ndirty_data = get_pages(sbi, F2FS_DIRTY_DATA);
> >  	si->ndirty_dirs = sbi->n_dirty_dirs;
> > +	si->ndirty_files = sbi->n_dirty_files;
> 
> 	... = sbi->n_dirty_inode[FILE_INODE];
> 	... = sbi->n_dirty_inode[DIR_INODE];
> 
> >  	si->ndirty_meta = get_pages(sbi, F2FS_DIRTY_META);
> >  	si->inmem_pages = get_pages(sbi, F2FS_INMEM_PAGES);
> >  	si->wb_pages = get_pages(sbi, F2FS_WRITEBACK);
> > @@ -298,6 +300,8 @@ static int stat_show(struct seq_file *s, void *v)
> >  			   si->ndirty_node, si->node_pages);
> >  		seq_printf(s, "  - dents: %4d in dirs:%4d\n",
> >  			   si->ndirty_dent, si->ndirty_dirs);
> > +		seq_printf(s, "  - datas: %4d in files:%4d\n",
> > +			   si->ndirty_data, si->ndirty_files);
> >  		seq_printf(s, "  - meta: %4d in %4d\n",
> >  			   si->ndirty_meta, si->meta_pages);
> >  		seq_printf(s, "  - NATs: %9d/%9d\n  - SITs: %9d/%9d\n",
> > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > index c68c4a3..e73ddea 100644
> > --- a/fs/f2fs/f2fs.h
> > +++ b/fs/f2fs/f2fs.h
> > @@ -818,6 +818,7 @@ struct f2fs_sb_info {
> >  	atomic_t inline_dir;			/* # of inline_dentry inodes */
> >  	int bg_gc;				/* background gc calls */
> >  	unsigned int n_dirty_dirs;		/* # of dir inodes */
> > +	unsigned int n_dirty_files;		/* # of regular/symlink inodes */
> >  #endif
> >  	unsigned int last_victim[2];		/* last victim segment # */
> >  	spinlock_t stat_lock;			/* lock for stat operations */
> > @@ -1887,7 +1888,8 @@ struct f2fs_stat_info {
> >  	unsigned long long hit_largest, hit_cached, hit_rbtree;
> >  	unsigned long long hit_total, total_ext;
> >  	int ext_tree, ext_node;
> > -	int ndirty_node, ndirty_dent, ndirty_dirs, ndirty_meta;
> > +	int ndirty_node, ndirty_meta;
> > +	int ndirty_dent, ndirty_dirs, ndirty_data, ndirty_files;
> >  	int nats, dirty_nats, sits, dirty_sits, fnids;
> >  	int total_count, utilization;
> >  	int bg_gc, inmem_pages, wb_pages;
> > @@ -1922,6 +1924,8 @@ static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
> >  #define stat_inc_bggc_count(sbi)	((sbi)->bg_gc++)
> >  #define stat_inc_dirty_dir(sbi)		((sbi)->n_dirty_dirs++)
> >  #define stat_dec_dirty_dir(sbi)		((sbi)->n_dirty_dirs--)
> > +#define stat_inc_dirty_file(sbi)	((sbi)->n_dirty_files++)
> > +#define stat_dec_dirty_file(sbi)	((sbi)->n_dirty_files--)
> >  #define stat_inc_total_hit(sbi)		(atomic64_inc(&(sbi)->total_hit_ext))
> >  #define stat_inc_rbtree_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_rbtree))
> >  #define stat_inc_largest_node_hit(sbi)	(atomic64_inc(&(sbi)->read_hit_largest))
> > @@ -2004,6 +2008,8 @@ void f2fs_destroy_root_stats(void);
> >  #define stat_inc_bggc_count(si)
> >  #define stat_inc_dirty_dir(sbi)
> >  #define stat_dec_dirty_dir(sbi)
> > +#define stat_inc_dirty_file(sbi)
> > +#define stat_dec_dirty_file(sbi)
> >  #define stat_inc_total_hit(sb)
> >  #define stat_inc_rbtree_node_hit(sb)
> >  #define stat_inc_largest_node_hit(sbi)
> > --
> > 2.6.3
> >

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