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Message-ID: <CACOAw_zn0ov0b2h9+zHn2gYVCDVGYPkXFNcx-j7OkhU0Y=i94g@mail.gmail.com>
Date: Wed, 30 Oct 2024 10:00:06 -0700
From: Daeho Jeong <daeho43@...il.com>
To: Yi Sun <yi.sun@...soc.com>
Cc: chao@...nel.org, jaegeuk@...nel.org, ke.wang@...soc.com,
linux-kernel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net,
sunyibuaa@...il.com, hao_hao.wang@...soc.com
Subject: Re: [f2fs-dev] [PATCH v2 4/5] f2fs: add parameter @len to f2fs_invalidate_blocks()
On Wed, Oct 30, 2024 at 3:35 AM Yi Sun <yi.sun@...soc.com> wrote:
>
> New function can process some consecutive blocks at a time.
>
> Function f2fs_invalidate_blocks()->down_write() and up_write()
> are very time-consuming, so if f2fs_invalidate_blocks() can
> process consecutive blocks at one time, it will save a lot of time.
>
> Signed-off-by: Yi Sun <yi.sun@...soc.com>
> ---
> fs/f2fs/compress.c | 4 +--
> fs/f2fs/f2fs.h | 3 +-
> fs/f2fs/file.c | 8 +++---
> fs/f2fs/node.c | 4 +--
> fs/f2fs/segment.c | 69 ++++++++++++++++++++++++++++++++++++++--------
> 5 files changed, 68 insertions(+), 20 deletions(-)
>
> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
> index e607a7885b57..02ad0ff29cf2 100644
> --- a/fs/f2fs/compress.c
> +++ b/fs/f2fs/compress.c
> @@ -1374,7 +1374,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
> if (blkaddr == COMPRESS_ADDR)
> fio.compr_blocks++;
> if (__is_valid_data_blkaddr(blkaddr))
> - f2fs_invalidate_blocks(sbi, blkaddr);
> + f2fs_invalidate_blocks(sbi, blkaddr, 1);
> f2fs_update_data_blkaddr(&dn, COMPRESS_ADDR);
> goto unlock_continue;
> }
> @@ -1384,7 +1384,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc,
>
> if (i > cc->valid_nr_cpages) {
> if (__is_valid_data_blkaddr(blkaddr)) {
> - f2fs_invalidate_blocks(sbi, blkaddr);
> + f2fs_invalidate_blocks(sbi, blkaddr, 1);
> f2fs_update_data_blkaddr(&dn, NEW_ADDR);
> }
> goto unlock_continue;
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index addd49af57ec..4bb459157adf 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -3716,7 +3716,8 @@ int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino);
> int f2fs_create_flush_cmd_control(struct f2fs_sb_info *sbi);
> int f2fs_flush_device_cache(struct f2fs_sb_info *sbi);
> void f2fs_destroy_flush_cmd_control(struct f2fs_sb_info *sbi, bool free);
> -void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr);
> +void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr,
> + unsigned int len);
> bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr);
> int f2fs_start_discard_thread(struct f2fs_sb_info *sbi);
> void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi);
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 75a8b22da664..13594bb502d1 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -652,7 +652,7 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
> valid_blocks++;
> }
>
> - f2fs_invalidate_blocks(sbi, blkaddr);
> + f2fs_invalidate_blocks(sbi, blkaddr, 1);
>
> if (!released || blkaddr != COMPRESS_ADDR)
> nr_free++;
> @@ -750,7 +750,7 @@ int f2fs_do_truncate_blocks(struct inode *inode, u64 from, bool lock)
> unsigned int i;
>
> for (i = 0; i < ei.len; i++)
> - f2fs_invalidate_blocks(sbi, ei.blk + i);
> + f2fs_invalidate_blocks(sbi, ei.blk + i, 1);
>
> dec_valid_block_count(sbi, inode, ei.len);
> f2fs_update_time(sbi, REQ_TIME);
> @@ -1319,7 +1319,7 @@ static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
> ret = f2fs_get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
> if (ret) {
> dec_valid_block_count(sbi, inode, 1);
> - f2fs_invalidate_blocks(sbi, *blkaddr);
> + f2fs_invalidate_blocks(sbi, *blkaddr, 1);
> } else {
> f2fs_update_data_blkaddr(&dn, *blkaddr);
> }
> @@ -1571,7 +1571,7 @@ static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
> break;
> }
>
> - f2fs_invalidate_blocks(sbi, dn->data_blkaddr);
> + f2fs_invalidate_blocks(sbi, dn->data_blkaddr, 1);
> f2fs_set_data_blkaddr(dn, NEW_ADDR);
> }
>
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index af36c6d6542b..db15d6a90f67 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -916,7 +916,7 @@ static int truncate_node(struct dnode_of_data *dn)
> }
>
> /* Deallocate node address */
> - f2fs_invalidate_blocks(sbi, ni.blk_addr);
> + f2fs_invalidate_blocks(sbi, ni.blk_addr, 1);
> dec_valid_node_count(sbi, dn->inode, dn->nid == dn->inode->i_ino);
> set_node_addr(sbi, &ni, NULL_ADDR, false);
>
> @@ -2761,7 +2761,7 @@ int f2fs_recover_xattr_data(struct inode *inode, struct page *page)
> if (err)
> return err;
>
> - f2fs_invalidate_blocks(sbi, ni.blk_addr);
> + f2fs_invalidate_blocks(sbi, ni.blk_addr, 1);
> dec_valid_node_count(sbi, inode, false);
> set_node_addr(sbi, &ni, NULL_ADDR, false);
>
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index 92ddff285a65..67f2bfdeb6ec 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -245,7 +245,7 @@ static int __replace_atomic_write_block(struct inode *inode, pgoff_t index,
> if (!__is_valid_data_blkaddr(new_addr)) {
> if (new_addr == NULL_ADDR)
> dec_valid_block_count(sbi, inode, 1);
> - f2fs_invalidate_blocks(sbi, dn.data_blkaddr);
> + f2fs_invalidate_blocks(sbi, dn.data_blkaddr, 1);
> f2fs_update_data_blkaddr(&dn, new_addr);
> } else {
> f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
> @@ -2558,29 +2558,76 @@ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
> get_sec_entry(sbi, segno)->valid_blocks += del;
> }
>
> -void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
> +static void __f2fs_invalidate_blocks(struct f2fs_sb_info *sbi,
> + block_t addr, block_t end)
> {
> unsigned int segno = GET_SEGNO(sbi, addr);
> struct sit_info *sit_i = SIT_I(sbi);
> + unsigned int seg_num = GET_SEGNO(sbi, end) - segno + 1;
> + unsigned int i = 1, max_blocks = sbi->blocks_per_seg, len;
> + block_t addr_start = addr;
>
> - f2fs_bug_on(sbi, addr == NULL_ADDR);
> - if (addr == NEW_ADDR || addr == COMPRESS_ADDR)
> - return;
> -
> - f2fs_invalidate_internal_cache(sbi, addr, 1);
> + f2fs_invalidate_internal_cache(sbi, addr, end - addr + 1);
>
> /* add it into sit main buffer */
> down_write(&sit_i->sentry_lock);
>
> - update_segment_mtime(sbi, addr, 0);
> - update_sit_entry(sbi, addr, -1);
> + if (seg_num == 1)
> + len = end - addr + 1;
> + else
> + len = max_blocks - GET_BLKOFF_FROM_SEG0(sbi, addr);
>
> - /* add it into dirty seglist */
> - locate_dirty_segment(sbi, segno);
> + do {
> + update_segment_mtime(sbi, addr_start, 0);
> + update_sit_entry(sbi, addr_start, -len);
> +
> + /* add it into dirty seglist */
> + locate_dirty_segment(sbi, segno);
> +
> + /* update @addr_start and @len and @segno */
> + addr_start = START_BLOCK(sbi, ++segno);
> + if (++i == seg_num)
> + len = GET_BLKOFF_FROM_SEG0(sbi, end) + 1;
> + else
> + len = max_blocks;
> + } while (i <= seg_num);
>
> up_write(&sit_i->sentry_lock);
> }
>
> +void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi,
> + block_t addr, unsigned int len)
> +{
> + unsigned int i;
> + /* Temporary record location */
> + block_t addr_start = addr, addr_end;
> +
> + if (len == 0)
> + return;
> +
> + for (i = 0; i < len; i++) {
> + addr_end = addr + i;
> +
> + f2fs_bug_on(sbi, addr_end == NULL_ADDR);
Looks like this line should be out of this loop, right?
> +
> + if (addr_end == NEW_ADDR || addr_end == COMPRESS_ADDR) {
ditto?
Could you help with enhancing the readability here? a little bit
confused with using addr_start, addr_end and NEW_ADDR, COMPRESS_ADDR,
here.
> + if (addr_start == addr_end) {
> + addr_end = addr_start = addr_end + 1;
> + continue;
> + }
> +
> + __f2fs_invalidate_blocks(sbi, addr_start, addr_end - 1);
> + addr_end = addr_start = addr_end + 1;
> + }
> + }
> +
> + if (addr_end >= (addr + len))
> + return;
> +
> + __f2fs_invalidate_blocks(sbi, addr_start, addr_end);
> +
> +}
> +
> bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
> {
> struct sit_info *sit_i = SIT_I(sbi);
> --
> 2.25.1
>
>
>
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> Linux-f2fs-devel@...ts.sourceforge.net
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