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Date: Mon, 3 Aug 2020 20:56:45 -0700
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: Chao Yu <yuchao0@...wei.com>
Cc: linux-kernel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH RFC 1/5] f2fs: introduce inmem curseg
On 08/04, Chao Yu wrote:
> On 2020/8/4 10:44, Jaegeuk Kim wrote:
> > 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.
>
> Oops, I thought that you have not finished reviewing all patches...
>
> Anyway, let me send v2 w/ changes mentioned by you.
>
> BTW, we can discuss about how to enable such feature, options can be:
> - enable when sb feature F2FS_FEATURE_ATGC was set
> - enable via mount option
Looks like mount option would be better.
> - enable via sysfs
>
> >
> > >
> > > >
> > > > 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@...wei.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@...ts.sourceforge.net
> > > > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> > > > > .
> > > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > Linux-f2fs-devel mailing list
> > > > Linux-f2fs-devel@...ts.sourceforge.net
> > > > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
> > > > .
> > > >
> > .
> >
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