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Message-ID: <52de7b11-e118-433d-b187-0642e81428ef@kernel.org>
Date: Thu, 17 Oct 2024 09:40:41 +0800
From: Chao Yu <chao@...nel.org>
To: Yi Sun <yi.sun@...soc.com>
Cc: Chao Yu <chao@...nel.org>, jaegeuk@...nel.org,
linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
sunyibuaa@...il.com, niuzhiguo84@...il.com, hao_hao.wang@...soc.com,
ke.wang@...soc.com
Subject: Re: [RFC PATCH 2/2] f2fs: introduce
f2fs_invalidate_consecutive_blocks()
On 2024/10/16 13:27, Yi Sun wrote:
> When doing truncate, consecutive blocks in the same segment
> can be processed at the same time. So that the efficiency of
> doing truncate can be improved.
>
> Add f2fs_invalidate_compress_pages_range() only for doing truncate.
> Add check_f2fs_invalidate_consecutive_blocks() only for doing
> truncate and to determine whether the blocks are continuous and
> belong to the same segment.
>
> Signed-off-by: Yi Sun <yi.sun@...soc.com>
> ---
> fs/f2fs/compress.c | 14 ++++++++++++++
> fs/f2fs/f2fs.h | 5 +++++
> fs/f2fs/file.c | 34 +++++++++++++++++++++++++++++++++-
> fs/f2fs/segment.c | 25 +++++++++++++++++++++++++
> 4 files changed, 77 insertions(+), 1 deletion(-)
>
> diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
> index 7f26440e8595..70929a87e9bf 100644
> --- a/fs/f2fs/compress.c
> +++ b/fs/f2fs/compress.c
> @@ -2014,6 +2014,20 @@ void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino)
> } while (index < end);
> }
>
> +void f2fs_invalidate_compress_pages_range(struct f2fs_sb_info *sbi,
> + block_t blkaddr, int cnt)
> +{
> + if (!sbi->compress_inode)
> + return;
> +
> + if (cnt < 1) {
> + f2fs_bug_on(sbi, 1);
> + cnt = 1;
> + }
> +
> + invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr + cnt - 1);
> +}
> +
> int f2fs_init_compress_inode(struct f2fs_sb_info *sbi)
> {
> struct inode *inode;
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index ce00cb546f4a..99767f35678f 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -3716,6 +3716,7 @@ 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_consecutive_blocks(struct f2fs_sb_info *sbi, block_t addr, int cnt);
> 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);
> @@ -4375,6 +4376,8 @@ void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
> bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page,
> block_t blkaddr);
> void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino);
> +void f2fs_invalidate_compress_pages_range(struct f2fs_sb_info *sbi,
> + block_t blkaddr, int cnt);
> #define inc_compr_inode_stat(inode) \
> do { \
> struct f2fs_sb_info *sbi = F2FS_I_SB(inode); \
> @@ -4432,6 +4435,8 @@ static inline bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi,
> struct page *page, block_t blkaddr) { return false; }
> static inline void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi,
> nid_t ino) { }
> +static inline void f2fs_invalidate_compress_pages_range(struct f2fs_sb_info *sbi,
> + block_t blkaddr, int cnt) { }
> #define inc_compr_inode_stat(inode) do { } while (0)
> static inline int f2fs_is_compressed_cluster(
> struct inode *inode,
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index 7057efa8ec17..634691e3b5f1 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -612,6 +612,18 @@ static int f2fs_file_open(struct inode *inode, struct file *filp)
> return finish_preallocate_blocks(inode);
> }
>
> +static bool check_f2fs_invalidate_consecutive_blocks(struct f2fs_sb_info *sbi,
> + block_t blkaddr1, block_t blkaddr2)
> +{
> + if (blkaddr2 - blkaddr1 != 1)
> + return false;
> +
> + if (GET_SEGNO(sbi, blkaddr1) != GET_SEGNO(sbi, blkaddr2))
> + return false;
> +
> + return true;
> +}
> +
> void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
> {
> struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
> @@ -621,6 +633,9 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
> int cluster_index = 0, valid_blocks = 0;
> int cluster_size = F2FS_I(dn->inode)->i_cluster_size;
> bool released = !atomic_read(&F2FS_I(dn->inode)->i_compr_blocks);
> + block_t con_start;
> + bool run_invalid = true;
> + int con_cnt = 1;
>
> addr = get_dnode_addr(dn->inode, dn->node_page) + ofs;
>
> @@ -652,7 +667,24 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
> valid_blocks++;
> }
>
> - f2fs_invalidate_blocks(sbi, blkaddr);
> + if (run_invalid)
> + con_start = blkaddr;
> +
> + if (count > 1 &&
> + check_f2fs_invalidate_consecutive_blocks(sbi, blkaddr,
> + le32_to_cpu(*(addr + 1)))) {
> + run_invalid = false;
> +
> + if (con_cnt++ == 1)
> + con_start = blkaddr;
> + } else {
> + run_invalid = true;
> + }
> +
> + if (run_invalid) {
> + f2fs_invalidate_consecutive_blocks(sbi, con_start, con_cnt);
> + con_cnt = 1;
> + }
>
> if (!released || blkaddr != COMPRESS_ADDR)
> nr_free++;
> diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
> index f118faf36d35..edb8a78985ba 100644
> --- a/fs/f2fs/segment.c
> +++ b/fs/f2fs/segment.c
> @@ -2570,6 +2570,31 @@ void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr)
> up_write(&sit_i->sentry_lock);
> }
>
> +void f2fs_invalidate_consecutive_blocks(struct f2fs_sb_info *sbi, block_t addr, int cnt)
> +{
> + unsigned int segno = GET_SEGNO(sbi, addr);
> + unsigned int segno2 = GET_SEGNO(sbi, addr + cnt - 1);
> + struct sit_info *sit_i = SIT_I(sbi);
> +
> + f2fs_bug_on(sbi, addr == NULL_ADDR || segno != segno2);
> + if (addr == NEW_ADDR || addr == COMPRESS_ADDR)
> + return;
> +
> + f2fs_truncate_meta_inode_pages(sbi, addr, cnt);
> + f2fs_invalidate_compress_pages_range(sbi, addr, cnt);
> +
> + /* add it into sit main buffer */
> + down_write(&sit_i->sentry_lock);
> +
> + update_segment_mtime(sbi, addr, 0);
> + update_sit_entry(sbi, addr, -cnt);
> +
> + /* add it into dirty seglist */
> + locate_dirty_segment(sbi, segno);
> +
> + up_write(&sit_i->sentry_lock);
I think it needs to clean up this patchset, what about expanding
f2fs_invalidate_blocks() to support invalidating block address extent?
Something like this:
void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t blkaddr,
unsigned int len)
{
struct sit_info *sit_i = SIT_I(sbi);
int i;
/* TODO: do sanity check on blkaddr extent */
down_write(&sit_i->sentry_lock);
/* TODO: expand f2fs_invalidate_internal_cache() to invalidate blkaddr extent */
f2fs_invalidate_internal_cache(sbi, blkaddr, len);
for (i = 0; i < len; i++) {
update_segment_mtime(sbi, blkaddr, 0);
update_sit_entry(sbi, blkaddr, -1);
/* add it into dirty seglist */
locate_dirty_segment(sbi, GET_SEGNO(sbi, blkaddr));
}
up_write(&sit_i->sentry_lock);
}
Thanks,
> +}
> +
> bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
> {
> struct sit_info *sit_i = SIT_I(sbi);
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