Re: [PATCH RFC 1/5] f2fs: introduce inmem curseg
From: Chao Yu
Date: Tue Jul 14 2020 - 23:40:00 EST
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?
>
> 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@xxxxxxxxxx>
>>>> ---
>>>> 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
>>> .
>>>
> .
>