Re: [f2fs-dev] [PATCH RFC 1/5] f2fs: introduce inmem curseg

[Jaegeuk Kim <jaegeuk@kernel.org>]

On 08/04, Chao Yu wrote:
> On 2020/7/25 16:42, Chao Yu wrote:
> > On 2020/7/16 9:24, Chao Yu wrote:
> > > On 2020/7/16 3:07, Jaegeuk Kim wrote:
> > > > On 07/15, Chao Yu wrote:
> > > > > On 2020/7/7 11:51, Jaegeuk Kim wrote:
> > > > > > On 07/07, Chao Yu wrote:
> > > > > > > On 2020/7/7 11:21, Jaegeuk Kim wrote:
> > > > > > > > Hi Chao,
> > > > > > > > 
> > > > > > > > Do you have any brief design doc to present the idea?
> > > > > > > 
> > > > > > > Hi Jaegeuk,
> > > > > > > 
> > > > > > > You mean this whole patchset, right?
> > > > > > > 
> > > > > > > I can add a brief design description in patch 0/5.
> > > > > > 
> > > > > > Yeah, it's a bit hard to understand the whole flow.
> > > > > 
> > > > > Jaegeuk,
> > > > > 
> > > > > Do you have time to take a look at this idea summarized in
> > > > > [PATCH 0/5]'s cover letter?
> > > > 
> > > > Sorry, I couldn't afford to sitting down to review the design.
> > > > Let me give it a try soon.
> > > 
> > > Alright, let me know if you have any question about the idea.
> > 
> > Ping,
> > 
> > Jaegeuk, still be too busy...? :P
> 
> Ping again...
> 
> Any thoughts about left patches in patchset?

Ah, I was waiting for your another patch-set.

> 
> > 
> > Thanks,
> > 
> > > 
> > > > 
> > > > > 
> > > > > > 
> > > > > > Thanks,
> > > > > > 
> > > > > > > 
> > > > > > > > 
> > > > > > > > Thanks,
> > > > > > > > 
> > > > > > > > On 06/30, Chao Yu wrote:
> > > > > > > > > Previous implementation of aligned pinfile allocation will:
> > > > > > > > > - allocate new segment on cold data log no matter whether last used
> > > > > > > > > segment is partially used or not, it makes IOs more random;
> > > > > > > > > - force concurrent cold data/GCed IO going into warm data area, it
> > > > > > > > > can make a bad effect on hot/cold data separation;
> > > > > > > > > 
> > > > > > > > > In this patch, we introduce a new type of log named 'inmem curseg',
> > > > > > > > > the differents from normal curseg is:
> > > > > > > > > - it reuses existed segment type (CURSEG_XXX_NODE/DATA);
> > > > > > > > > - it only exists in memory, its segno, blkofs, summary will not b
> > > > > > > > >    persisted into checkpoint area;
> > > > > > > > > 
> > > > > > > > > With this new feature, we can enhance scalability of log, special
> > > > > > > > > allocators can be created for purposes:
> > > > > > > > > - pure lfs allocator for aligned pinfile allocation or file
> > > > > > > > > defragmentation
> > > > > > > > > - pure ssr allocator for later feature
> > > > > > > > > 
> > > > > > > > > So that, let's update aligned pinfile allocation to use this new
> > > > > > > > > inmem curseg fwk.
> > > > > > > > > 
> > > > > > > > > Signed-off-by: Chao Yu <yuchao0@huawei.com>
> > > > > > > > > ---
> > > > > > > > >    fs/f2fs/checkpoint.c |   7 ++-
> > > > > > > > >    fs/f2fs/debug.c      |   6 ++-
> > > > > > > > >    fs/f2fs/f2fs.h       |  12 +++--
> > > > > > > > >    fs/f2fs/file.c       |   3 +-
> > > > > > > > >    fs/f2fs/gc.c         |   2 +-
> > > > > > > > >    fs/f2fs/segment.c    | 107 ++++++++++++++++++++++++++++++-------------
> > > > > > > > >    fs/f2fs/segment.h    |  17 ++++---
> > > > > > > > >    fs/f2fs/super.c      |   9 ++--
> > > > > > > > >    8 files changed, 112 insertions(+), 51 deletions(-)
> > > > > > > > > 
> > > > > > > > > diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
> > > > > > > > > index 1bb8278a1c4a..644a914af25a 100644
> > > > > > > > > --- a/fs/f2fs/checkpoint.c
> > > > > > > > > +++ b/fs/f2fs/checkpoint.c
> > > > > > > > > @@ -1623,11 +1623,16 @@ int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
> > > > > > > > >    	f2fs_flush_sit_entries(sbi, cpc);
> > > > > > > > > +	/* save inmem log status */
> > > > > > > > > +	f2fs_save_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED);
> > > > > > > > > +
> > > > > > > > >    	err = do_checkpoint(sbi, cpc);
> > > > > > > > >    	if (err)
> > > > > > > > >    		f2fs_release_discard_addrs(sbi);
> > > > > > > > >    	else
> > > > > > > > >    		f2fs_clear_prefree_segments(sbi, cpc);
> > > > > > > > > +
> > > > > > > > > +	f2fs_restore_inmem_curseg(sbi, CURSEG_COLD_DATA_PINNED);
> > > > > > > > >    stop:
> > > > > > > > >    	unblock_operations(sbi);
> > > > > > > > >    	stat_inc_cp_count(sbi->stat_info);
> > > > > > > > > @@ -1658,7 +1663,7 @@ void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi)
> > > > > > > > >    	}
> > > > > > > > >    	sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
> > > > > > > > > -			NR_CURSEG_TYPE - __cp_payload(sbi)) *
> > > > > > > > > +			NR_CURSEG_PERSIST_TYPE - __cp_payload(sbi)) *
> > > > > > > > >    				F2FS_ORPHANS_PER_BLOCK;
> > > > > > > > >    }
> > > > > > > > > diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
> > > > > > > > > index 4276c0f79beb..41a91aa8c262 100644
> > > > > > > > > --- a/fs/f2fs/debug.c
> > > > > > > > > +++ b/fs/f2fs/debug.c
> > > > > > > > > @@ -164,7 +164,7 @@ static void update_general_status(struct f2fs_sb_info *sbi)
> > > > > > > > >    		* 100 / (int)(sbi->user_block_count >> sbi->log_blocks_per_seg)
> > > > > > > > >    		/ 2;
> > > > > > > > >    	si->util_invalid = 50 - si->util_free - si->util_valid;
> > > > > > > > > -	for (i = CURSEG_HOT_DATA; i <= CURSEG_COLD_NODE; i++) {
> > > > > > > > > +	for (i = CURSEG_HOT_DATA; i < NO_CHECK_TYPE; i++) {
> > > > > > > > >    		struct curseg_info *curseg = CURSEG_I(sbi, i);
> > > > > > > > >    		si->curseg[i] = curseg->segno;
> > > > > > > > >    		si->cursec[i] = GET_SEC_FROM_SEG(sbi, curseg->segno);
> > > > > > > > > @@ -393,6 +393,10 @@ static int stat_show(struct seq_file *s, void *v)
> > > > > > > > >    			   si->dirty_seg[CURSEG_COLD_NODE],
> > > > > > > > >    			   si->full_seg[CURSEG_COLD_NODE],
> > > > > > > > >    			   si->valid_blks[CURSEG_COLD_NODE]);
> > > > > > > > > +		seq_printf(s, "  - Pinned file: %8d %8d %8d\n",
> > > > > > > > > +			   si->curseg[CURSEG_COLD_DATA_PINNED],
> > > > > > > > > +			   si->cursec[CURSEG_COLD_DATA_PINNED],
> > > > > > > > > +			   si->curzone[CURSEG_COLD_DATA_PINNED]);
> > > > > > > > >    		seq_printf(s, "\n  - Valid: %d\n  - Dirty: %d\n",
> > > > > > > > >    			   si->main_area_segs - si->dirty_count -
> > > > > > > > >    			   si->prefree_count - si->free_segs,
> > > > > > > > > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> > > > > > > > > index 7d6c5f8ce16b..f06c77066284 100644
> > > > > > > > > --- a/fs/f2fs/f2fs.h
> > > > > > > > > +++ b/fs/f2fs/f2fs.h
> > > > > > > > > @@ -996,7 +996,9 @@ static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode,
> > > > > > > > >     */
> > > > > > > > >    #define	NR_CURSEG_DATA_TYPE	(3)
> > > > > > > > >    #define NR_CURSEG_NODE_TYPE	(3)
> > > > > > > > > -#define NR_CURSEG_TYPE	(NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
> > > > > > > > > +#define NR_CURSEG_INMEM_TYPE	(1)
> > > > > > > > > +#define NR_CURSEG_PERSIST_TYPE	(NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE)
> > > > > > > > > +#define NR_CURSEG_TYPE		(NR_CURSEG_INMEM_TYPE + NR_CURSEG_PERSIST_TYPE)
> > > > > > > > >    enum {
> > > > > > > > >    	CURSEG_HOT_DATA	= 0,	/* directory entry blocks */
> > > > > > > > > @@ -1005,8 +1007,10 @@ enum {
> > > > > > > > >    	CURSEG_HOT_NODE,	/* direct node blocks of directory files */
> > > > > > > > >    	CURSEG_WARM_NODE,	/* direct node blocks of normal files */
> > > > > > > > >    	CURSEG_COLD_NODE,	/* indirect node blocks */
> > > > > > > > > -	NO_CHECK_TYPE,
> > > > > > > > > -	CURSEG_COLD_DATA_PINNED,/* cold data for pinned file */
> > > > > > > > > +	NR_PERSISTENT_LOG,	/* number of persistent log */
> > > > > > > > > +	CURSEG_COLD_DATA_PINNED = NR_PERSISTENT_LOG,
> > > > > > > > > +				/* pinned file that needs consecutive block address */
> > > > > > > > > +	NO_CHECK_TYPE,		/* number of persistent & inmem log */
> > > > > > > > >    };
> > > > > > > > >    struct flush_cmd {
> > > > > > > > > @@ -3359,6 +3363,8 @@ block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi);
> > > > > > > > >    int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable);
> > > > > > > > >    void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi);
> > > > > > > > >    int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra);
> > > > > > > > > +void f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi, int type);
> > > > > > > > > +void f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi, int type);
> > > > > > > > >    void f2fs_allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
> > > > > > > > >    					unsigned int start, unsigned int end);
> > > > > > > > >    void f2fs_allocate_new_segment(struct f2fs_sb_info *sbi, int type);
> > > > > > > > > diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> > > > > > > > > index c10e82806c2a..8611ade06018 100644
> > > > > > > > > --- a/fs/f2fs/file.c
> > > > > > > > > +++ b/fs/f2fs/file.c
> > > > > > > > > @@ -1656,13 +1656,14 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
> > > > > > > > >    		}
> > > > > > > > >    		down_write(&sbi->pin_sem);
> > > > > > > > > -		map.m_seg_type = CURSEG_COLD_DATA_PINNED;
> > > > > > > > >    		f2fs_lock_op(sbi);
> > > > > > > > >    		f2fs_allocate_new_segment(sbi, CURSEG_COLD_DATA);
> > > > > > > > >    		f2fs_unlock_op(sbi);
> > > > > > > > > +		map.m_seg_type = CURSEG_COLD_DATA_PINNED;
> > > > > > > > >    		err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO);
> > > > > > > > > +
> > > > > > > > >    		up_write(&sbi->pin_sem);
> > > > > > > > >    		done += map.m_len;
> > > > > > > > > diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
> > > > > > > > > index 3b718da69910..84807abe4e00 100644
> > > > > > > > > --- a/fs/f2fs/gc.c
> > > > > > > > > +++ b/fs/f2fs/gc.c
> > > > > > > > > @@ -1448,7 +1448,7 @@ static int free_segment_range(struct f2fs_sb_info *sbi,
> > > > > > > > >    	mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
> > > > > > > > >    	/* Move out cursegs from the target range */
> > > > > > > > > -	for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++)
> > > > > > > > > +	for (type = CURSEG_HOT_DATA; type < NR_CURSEG_PERSIST_TYPE; type++)
> > > > > > > > >    		f2fs_allocate_segment_for_resize(sbi, type, start, end);
> > > > > > > > >    	/* do GC to move out valid blocks in the range */
> > > > > > > > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> > > > > > > > > index 5924b3965ae4..863ec6f1fb87 100644
> > > > > > > > > --- a/fs/f2fs/segment.c
> > > > > > > > > +++ b/fs/f2fs/segment.c
> > > > > > > > > @@ -1958,7 +1958,7 @@ static void set_prefree_as_free_segments(struct f2fs_sb_info *sbi)
> > > > > > > > >    	mutex_lock(&dirty_i->seglist_lock);
> > > > > > > > >    	for_each_set_bit(segno, dirty_i->dirty_segmap[PRE], MAIN_SEGS(sbi))
> > > > > > > > > -		__set_test_and_free(sbi, segno);
> > > > > > > > > +		__set_test_and_free(sbi, segno, false);
> > > > > > > > >    	mutex_unlock(&dirty_i->seglist_lock);
> > > > > > > > >    }
> > > > > > > > > @@ -2496,6 +2496,7 @@ static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
> > > > > > > > >    	struct curseg_info *curseg = CURSEG_I(sbi, type);
> > > > > > > > >    	struct summary_footer *sum_footer;
> > > > > > > > > +	curseg->inited = true;
> > > > > > > > >    	curseg->segno = curseg->next_segno;
> > > > > > > > >    	curseg->zone = GET_ZONE_FROM_SEG(sbi, curseg->segno);
> > > > > > > > >    	curseg->next_blkoff = 0;
> > > > > > > > > @@ -2503,24 +2504,31 @@ static void reset_curseg(struct f2fs_sb_info *sbi, int type, int modified)
> > > > > > > > >    	sum_footer = &(curseg->sum_blk->footer);
> > > > > > > > >    	memset(sum_footer, 0, sizeof(struct summary_footer));
> > > > > > > > > -	if (IS_DATASEG(type))
> > > > > > > > > +	if (IS_DATASEG(curseg->seg_type))
> > > > > > > > >    		SET_SUM_TYPE(sum_footer, SUM_TYPE_DATA);
> > > > > > > > > -	if (IS_NODESEG(type))
> > > > > > > > > +	if (IS_NODESEG(curseg->seg_type))
> > > > > > > > >    		SET_SUM_TYPE(sum_footer, SUM_TYPE_NODE);
> > > > > > > > > -	__set_sit_entry_type(sbi, type, curseg->segno, modified);
> > > > > > > > > +	__set_sit_entry_type(sbi, curseg->seg_type, curseg->segno, modified);
> > > > > > > > >    }
> > > > > > > > >    static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
> > > > > > > > >    {
> > > > > > > > > +	struct curseg_info *curseg = CURSEG_I(sbi, type);
> > > > > > > > > +
> > > > > > > > >    	/* if segs_per_sec is large than 1, we need to keep original policy. */
> > > > > > > > >    	if (__is_large_section(sbi))
> > > > > > > > > -		return CURSEG_I(sbi, type)->segno;
> > > > > > > > > +		return curseg->segno;
> > > > > > > > > +
> > > > > > > > > +	/* inmem log may not locate on any segment after mount */
> > > > > > > > > +	if (!curseg->inited)
> > > > > > > > > +		return 0;
> > > > > > > > >    	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
> > > > > > > > >    		return 0;
> > > > > > > > >    	if (test_opt(sbi, NOHEAP) &&
> > > > > > > > > -		(type == CURSEG_HOT_DATA || IS_NODESEG(type)))
> > > > > > > > > +		(curseg->seg_type == CURSEG_HOT_DATA ||
> > > > > > > > > +		IS_NODESEG(curseg->seg_type)))
> > > > > > > > >    		return 0;
> > > > > > > > >    	if (SIT_I(sbi)->last_victim[ALLOC_NEXT])
> > > > > > > > > @@ -2530,7 +2538,7 @@ static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
> > > > > > > > >    	if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_REUSE)
> > > > > > > > >    		return 0;
> > > > > > > > > -	return CURSEG_I(sbi, type)->segno;
> > > > > > > > > +	return curseg->segno;
> > > > > > > > >    }
> > > > > > > > >    /*
> > > > > > > > > @@ -2540,12 +2548,14 @@ static unsigned int __get_next_segno(struct f2fs_sb_info *sbi, int type)
> > > > > > > > >    static void new_curseg(struct f2fs_sb_info *sbi, int type, bool new_sec)
> > > > > > > > >    {
> > > > > > > > >    	struct curseg_info *curseg = CURSEG_I(sbi, type);
> > > > > > > > > +	unsigned short seg_type = curseg->seg_type;
> > > > > > > > >    	unsigned int segno = curseg->segno;
> > > > > > > > >    	int dir = ALLOC_LEFT;
> > > > > > > > > -	write_sum_page(sbi, curseg->sum_blk,
> > > > > > > > > +	if (curseg->inited)
> > > > > > > > > +		write_sum_page(sbi, curseg->sum_blk,
> > > > > > > > >    				GET_SUM_BLOCK(sbi, segno));
> > > > > > > > > -	if (type == CURSEG_WARM_DATA || type == CURSEG_COLD_DATA)
> > > > > > > > > +	if (seg_type == CURSEG_WARM_DATA || seg_type == CURSEG_COLD_DATA)
> > > > > > > > >    		dir = ALLOC_RIGHT;
> > > > > > > > >    	if (test_opt(sbi, NOHEAP))
> > > > > > > > > @@ -2622,6 +2632,43 @@ static void change_curseg(struct f2fs_sb_info *sbi, int type)
> > > > > > > > >    	f2fs_put_page(sum_page, 1);
> > > > > > > > >    }
> > > > > > > > > +void f2fs_save_inmem_curseg(struct f2fs_sb_info *sbi, int type)
> > > > > > > > > +{
> > > > > > > > > +	struct curseg_info *curseg = CURSEG_I(sbi, type);
> > > > > > > > > +
> > > > > > > > > +	mutex_lock(&curseg->curseg_mutex);
> > > > > > > > > +	if (!curseg->inited)
> > > > > > > > > +		goto out;
> > > > > > > > > +
> > > > > > > > > +	if (get_valid_blocks(sbi, curseg->segno, false)) {
> > > > > > > > > +		write_sum_page(sbi, curseg->sum_blk,
> > > > > > > > > +				GET_SUM_BLOCK(sbi, curseg->segno));
> > > > > > > > > +	} else {
> > > > > > > > > +		mutex_lock(&DIRTY_I(sbi)->seglist_lock);
> > > > > > > > > +		__set_test_and_free(sbi, curseg->segno, true);
> > > > > > > > > +		mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
> > > > > > > > > +	}
> > > > > > > > > +out:
> > > > > > > > > +	mutex_unlock(&curseg->curseg_mutex);
> > > > > > > > > +}
> > > > > > > > > +
> > > > > > > > > +void f2fs_restore_inmem_curseg(struct f2fs_sb_info *sbi, int type)
> > > > > > > > > +{
> > > > > > > > > +	struct curseg_info *curseg = CURSEG_I(sbi, type);
> > > > > > > > > +
> > > > > > > > > +	mutex_lock(&curseg->curseg_mutex);
> > > > > > > > > +	if (!curseg->inited)
> > > > > > > > > +		goto out;
> > > > > > > > > +	if (get_valid_blocks(sbi, curseg->segno, false))
> > > > > > > > > +		goto out;
> > > > > > > > > +
> > > > > > > > > +	mutex_lock(&DIRTY_I(sbi)->seglist_lock);
> > > > > > > > > +	__set_test_and_inuse(sbi, curseg->segno);
> > > > > > > > > +	mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
> > > > > > > > > +out:
> > > > > > > > > +	mutex_unlock(&curseg->curseg_mutex);
> > > > > > > > > +}
> > > > > > > > > +
> > > > > > > > >    static int get_ssr_segment(struct f2fs_sb_info *sbi, int type)
> > > > > > > > >    {
> > > > > > > > >    	struct curseg_info *curseg = CURSEG_I(sbi, type);
> > > > > > > > > @@ -2738,11 +2785,15 @@ void __allocate_new_segment(struct f2fs_sb_info *sbi, int type)
> > > > > > > > >    	struct curseg_info *curseg = CURSEG_I(sbi, type);
> > > > > > > > >    	unsigned int old_segno;
> > > > > > > > > +	if (!curseg->inited)
> > > > > > > > > +		goto alloc;
> > > > > > > > > +
> > > > > > > > >    	if (!curseg->next_blkoff &&
> > > > > > > > >    		!get_valid_blocks(sbi, curseg->segno, false) &&
> > > > > > > > >    		!get_ckpt_valid_blocks(sbi, curseg->segno))
> > > > > > > > >    		return;
> > > > > > > > > +alloc:
> > > > > > > > >    	old_segno = curseg->segno;
> > > > > > > > >    	SIT_I(sbi)->s_ops->allocate_segment(sbi, type, true);
> > > > > > > > >    	locate_dirty_segment(sbi, old_segno);
> > > > > > > > > @@ -3126,19 +3177,6 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > > > > > > >    {
> > > > > > > > >    	struct sit_info *sit_i = SIT_I(sbi);
> > > > > > > > >    	struct curseg_info *curseg = CURSEG_I(sbi, type);
> > > > > > > > > -	bool put_pin_sem = false;
> > > > > > > > > -
> > > > > > > > > -	if (type == CURSEG_COLD_DATA) {
> > > > > > > > > -		/* GC during CURSEG_COLD_DATA_PINNED allocation */
> > > > > > > > > -		if (down_read_trylock(&sbi->pin_sem)) {
> > > > > > > > > -			put_pin_sem = true;
> > > > > > > > > -		} else {
> > > > > > > > > -			type = CURSEG_WARM_DATA;
> > > > > > > > > -			curseg = CURSEG_I(sbi, type);
> > > > > > > > > -		}
> > > > > > > > > -	} else if (type == CURSEG_COLD_DATA_PINNED) {
> > > > > > > > > -		type = CURSEG_COLD_DATA;
> > > > > > > > > -	}
> > > > > > > > >    	down_read(&SM_I(sbi)->curseg_lock);
> > > > > > > > > @@ -3204,9 +3242,6 @@ void f2fs_allocate_data_block(struct f2fs_sb_info *sbi, struct page *page,
> > > > > > > > >    	mutex_unlock(&curseg->curseg_mutex);
> > > > > > > > >    	up_read(&SM_I(sbi)->curseg_lock);
> > > > > > > > > -
> > > > > > > > > -	if (put_pin_sem)
> > > > > > > > > -		up_read(&sbi->pin_sem);
> > > > > > > > >    }
> > > > > > > > >    static void update_device_state(struct f2fs_io_info *fio)
> > > > > > > > > @@ -3574,7 +3609,7 @@ static int read_normal_summaries(struct f2fs_sb_info *sbi, int type)
> > > > > > > > >    		blk_off = le16_to_cpu(ckpt->cur_data_blkoff[type -
> > > > > > > > >    							CURSEG_HOT_DATA]);
> > > > > > > > >    		if (__exist_node_summaries(sbi))
> > > > > > > > > -			blk_addr = sum_blk_addr(sbi, NR_CURSEG_TYPE, type);
> > > > > > > > > +			blk_addr = sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type);
> > > > > > > > >    		else
> > > > > > > > >    			blk_addr = sum_blk_addr(sbi, NR_CURSEG_DATA_TYPE, type);
> > > > > > > > >    	} else {
> > > > > > > > > @@ -3652,8 +3687,9 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
> > > > > > > > >    	}
> > > > > > > > >    	if (__exist_node_summaries(sbi))
> > > > > > > > > -		f2fs_ra_meta_pages(sbi, sum_blk_addr(sbi, NR_CURSEG_TYPE, type),
> > > > > > > > > -					NR_CURSEG_TYPE - type, META_CP, true);
> > > > > > > > > +		f2fs_ra_meta_pages(sbi,
> > > > > > > > > +				sum_blk_addr(sbi, NR_CURSEG_PERSIST_TYPE, type),
> > > > > > > > > +				NR_CURSEG_PERSIST_TYPE - type, META_CP, true);
> > > > > > > > >    	for (; type <= CURSEG_COLD_NODE; type++) {
> > > > > > > > >    		err = read_normal_summaries(sbi, type);
> > > > > > > > > @@ -4155,14 +4191,14 @@ static int build_curseg(struct f2fs_sb_info *sbi)
> > > > > > > > >    	struct curseg_info *array;
> > > > > > > > >    	int i;
> > > > > > > > > -	array = f2fs_kzalloc(sbi, array_size(NR_CURSEG_TYPE, sizeof(*array)),
> > > > > > > > > -			     GFP_KERNEL);
> > > > > > > > > +	array = f2fs_kzalloc(sbi, array_size(NR_CURSEG_TYPE,
> > > > > > > > > +					sizeof(*array)), GFP_KERNEL);
> > > > > > > > >    	if (!array)
> > > > > > > > >    		return -ENOMEM;
> > > > > > > > >    	SM_I(sbi)->curseg_array = array;
> > > > > > > > > -	for (i = 0; i < NR_CURSEG_TYPE; i++) {
> > > > > > > > > +	for (i = 0; i < NO_CHECK_TYPE; i++) {
> > > > > > > > >    		mutex_init(&array[i].curseg_mutex);
> > > > > > > > >    		array[i].sum_blk = f2fs_kzalloc(sbi, PAGE_SIZE, GFP_KERNEL);
> > > > > > > > >    		if (!array[i].sum_blk)
> > > > > > > > > @@ -4172,8 +4208,13 @@ static int build_curseg(struct f2fs_sb_info *sbi)
> > > > > > > > >    				sizeof(struct f2fs_journal), GFP_KERNEL);
> > > > > > > > >    		if (!array[i].journal)
> > > > > > > > >    			return -ENOMEM;
> > > > > > > > > +		if (i < NR_PERSISTENT_LOG)
> > > > > > > > > +			array[i].seg_type = CURSEG_HOT_DATA + i;
> > > > > > > > > +		else if (i == CURSEG_COLD_DATA_PINNED)
> > > > > > > > > +			array[i].seg_type = CURSEG_COLD_DATA;
> > > > > > > > >    		array[i].segno = NULL_SEGNO;
> > > > > > > > >    		array[i].next_blkoff = 0;
> > > > > > > > > +		array[i].inited = false;
> > > > > > > > >    	}
> > > > > > > > >    	return restore_curseg_summaries(sbi);
> > > > > > > > >    }
> > > > > > > > > @@ -4408,7 +4449,7 @@ static int sanity_check_curseg(struct f2fs_sb_info *sbi)
> > > > > > > > >    	 * In LFS/SSR curseg, .next_blkoff should point to an unused blkaddr;
> > > > > > > > >    	 * In LFS curseg, all blkaddr after .next_blkoff should be unused.
> > > > > > > > >    	 */
> > > > > > > > > -	for (i = 0; i < NO_CHECK_TYPE; i++) {
> > > > > > > > > +	for (i = 0; i < NR_PERSISTENT_LOG; i++) {
> > > > > > > > >    		struct curseg_info *curseg = CURSEG_I(sbi, i);
> > > > > > > > >    		struct seg_entry *se = get_seg_entry(sbi, curseg->segno);
> > > > > > > > >    		unsigned int blkofs = curseg->next_blkoff;
> > > > > > > > > @@ -4637,7 +4678,7 @@ int f2fs_fix_curseg_write_pointer(struct f2fs_sb_info *sbi)
> > > > > > > > >    {
> > > > > > > > >    	int i, ret;
> > > > > > > > > -	for (i = 0; i < NO_CHECK_TYPE; i++) {
> > > > > > > > > +	for (i = 0; i < NR_PERSISTENT_LOG; i++) {
> > > > > > > > >    		ret = fix_curseg_write_pointer(sbi, i);
> > > > > > > > >    		if (ret)
> > > > > > > > >    			return ret;
> > > > > > > > > diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
> > > > > > > > > index f261e3e6a69b..8ff261550cbb 100644
> > > > > > > > > --- a/fs/f2fs/segment.h
> > > > > > > > > +++ b/fs/f2fs/segment.h
> > > > > > > > > @@ -22,7 +22,7 @@
> > > > > > > > >    #define GET_R2L_SEGNO(free_i, segno)	((segno) + (free_i)->start_segno)
> > > > > > > > >    #define IS_DATASEG(t)	((t) <= CURSEG_COLD_DATA)
> > > > > > > > > -#define IS_NODESEG(t)	((t) >= CURSEG_HOT_NODE)
> > > > > > > > > +#define IS_NODESEG(t)	((t) >= CURSEG_HOT_NODE && (t) <= CURSEG_COLD_NODE)
> > > > > > > > >    #define IS_HOT(t)	((t) == CURSEG_HOT_NODE || (t) == CURSEG_HOT_DATA)
> > > > > > > > >    #define IS_WARM(t)	((t) == CURSEG_WARM_NODE || (t) == CURSEG_WARM_DATA)
> > > > > > > > > @@ -34,7 +34,8 @@
> > > > > > > > >    	 ((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) ||	\
> > > > > > > > >    	 ((seg) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) ||	\
> > > > > > > > >    	 ((seg) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) ||	\
> > > > > > > > > -	 ((seg) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno))
> > > > > > > > > +	 ((seg) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno) ||	\
> > > > > > > > > +	 ((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA_PINNED)->segno))
> > > > > > > > >    #define IS_CURSEC(sbi, secno)						\
> > > > > > > > >    	(((secno) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno /		\
> > > > > > > > > @@ -48,7 +49,9 @@
> > > > > > > > >    	 ((secno) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno /		\
> > > > > > > > >    	  (sbi)->segs_per_sec) ||	\
> > > > > > > > >    	 ((secno) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno /		\
> > > > > > > > > -	  (sbi)->segs_per_sec))	\
> > > > > > > > > +	  (sbi)->segs_per_sec) ||	\
> > > > > > > > > +	 ((secno) == CURSEG_I(sbi, CURSEG_COLD_DATA_PINNED)->segno /	\
> > > > > > > > > +	  (sbi)->segs_per_sec))
> > > > > > > > >    #define MAIN_BLKADDR(sbi)						\
> > > > > > > > >    	(SM_I(sbi) ? SM_I(sbi)->main_blkaddr : 				\
> > > > > > > > > @@ -288,10 +291,12 @@ struct curseg_info {
> > > > > > > > >    	struct rw_semaphore journal_rwsem;	/* protect journal area */
> > > > > > > > >    	struct f2fs_journal *journal;		/* cached journal info */
> > > > > > > > >    	unsigned char alloc_type;		/* current allocation type */
> > > > > > > > > +	unsigned short seg_type;		/* segment type like CURSEG_XXX_TYPE */
> > > > > > > > >    	unsigned int segno;			/* current segment number */
> > > > > > > > >    	unsigned short next_blkoff;		/* next block offset to write */
> > > > > > > > >    	unsigned int zone;			/* current zone number */
> > > > > > > > >    	unsigned int next_segno;		/* preallocated segment */
> > > > > > > > > +	bool inited;				/* indicate inmem log is inited */
> > > > > > > > >    };
> > > > > > > > >    struct sit_entry_set {
> > > > > > > > > @@ -305,8 +310,6 @@ struct sit_entry_set {
> > > > > > > > >     */
> > > > > > > > >    static inline struct curseg_info *CURSEG_I(struct f2fs_sb_info *sbi, int type)
> > > > > > > > >    {
> > > > > > > > > -	if (type == CURSEG_COLD_DATA_PINNED)
> > > > > > > > > -		type = CURSEG_COLD_DATA;
> > > > > > > > >    	return (struct curseg_info *)(SM_I(sbi)->curseg_array + type);
> > > > > > > > >    }
> > > > > > > > > @@ -438,7 +441,7 @@ static inline void __set_inuse(struct f2fs_sb_info *sbi,
> > > > > > > > >    }
> > > > > > > > >    static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
> > > > > > > > > -		unsigned int segno)
> > > > > > > > > +		unsigned int segno, bool inmem)
> > > > > > > > >    {
> > > > > > > > >    	struct free_segmap_info *free_i = FREE_I(sbi);
> > > > > > > > >    	unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
> > > > > > > > > @@ -449,7 +452,7 @@ static inline void __set_test_and_free(struct f2fs_sb_info *sbi,
> > > > > > > > >    	if (test_and_clear_bit(segno, free_i->free_segmap)) {
> > > > > > > > >    		free_i->free_segments++;
> > > > > > > > > -		if (IS_CURSEC(sbi, secno))
> > > > > > > > > +		if (!inmem && IS_CURSEC(sbi, secno))
> > > > > > > > >    			goto skip_free;
> > > > > > > > >    		next = find_next_bit(free_i->free_segmap,
> > > > > > > > >    				start_segno + sbi->segs_per_sec, start_segno);
> > > > > > > > > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> > > > > > > > > index 80cb7cd358f8..0fefa130585f 100644
> > > > > > > > > --- a/fs/f2fs/super.c
> > > > > > > > > +++ b/fs/f2fs/super.c
> > > > > > > > > @@ -575,7 +575,8 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
> > > > > > > > >    		case Opt_active_logs:
> > > > > > > > >    			if (args->from && match_int(args, &arg))
> > > > > > > > >    				return -EINVAL;
> > > > > > > > > -			if (arg != 2 && arg != 4 && arg != NR_CURSEG_TYPE)
> > > > > > > > > +			if (arg != 2 && arg != 4 &&
> > > > > > > > > +				arg != NR_CURSEG_PERSIST_TYPE)
> > > > > > > > >    				return -EINVAL;
> > > > > > > > >    			F2FS_OPTION(sbi).active_logs = arg;
> > > > > > > > >    			break;
> > > > > > > > > @@ -981,7 +982,7 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount)
> > > > > > > > >    	}
> > > > > > > > >    	/* Not pass down write hints if the number of active logs is lesser
> > > > > > > > > -	 * than NR_CURSEG_TYPE.
> > > > > > > > > +	 * than NR_CURSEG_PERSIST_TYPE.
> > > > > > > > >    	 */
> > > > > > > > >    	if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE)
> > > > > > > > >    		F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
> > > > > > > > > @@ -1614,7 +1615,7 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
> > > > > > > > >    static void default_options(struct f2fs_sb_info *sbi)
> > > > > > > > >    {
> > > > > > > > >    	/* init some FS parameters */
> > > > > > > > > -	F2FS_OPTION(sbi).active_logs = NR_CURSEG_TYPE;
> > > > > > > > > +	F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE;
> > > > > > > > >    	F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
> > > > > > > > >    	F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
> > > > > > > > >    	F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
> > > > > > > > > @@ -2946,7 +2947,7 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
> > > > > > > > >    	cp_payload = __cp_payload(sbi);
> > > > > > > > >    	if (cp_pack_start_sum < cp_payload + 1 ||
> > > > > > > > >    		cp_pack_start_sum > blocks_per_seg - 1 -
> > > > > > > > > -			NR_CURSEG_TYPE) {
> > > > > > > > > +			NR_CURSEG_PERSIST_TYPE) {
> > > > > > > > >    		f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
> > > > > > > > >    			 cp_pack_start_sum);
> > > > > > > > >    		return 1;
> > > > > > > > > -- 
> > > > > > > > > 2.26.2
> > > > > > > > .
> > > > > > > > 
> > > > > > .
> > > > > > 
> > > > .
> > > > 
> > > 
> > > 
> > > _______________________________________________
> > > Linux-f2fs-devel mailing list
> > > Linux-f2fs-devel@lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> > > .
> > > 
> > 
> > 
> > _______________________________________________
> > Linux-f2fs-devel mailing list
> > Linux-f2fs-devel@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> > .
> >