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Thu, 15 Oct 2026 02:37:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C38A31F000C4; Thu, 15 Oct 2026 02:37:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792031864; bh=Sr0u6wVPt1hjNUcUWLk504EZuBlXvMBHDZSeAxC33qE=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=MdOTYlF3Kd34N9xur0Y0XSPY5stHG1Okt7AFE8iRE3uLi5lYvwZDnYKBnW+aLs385 6WSK6+yFjevEkA7wpdLR1jZtIY+3X4anq+/9i48MvkAaFy0MTvdRRXQDMOxKXNZRdw /xFflZOQauAXksAiXgHZgx7Sewv5y05jpjuIGTBq0LwN0KIwVzqdaPgph2EVXGEtxn l/MN+uwA3U7cKYsu5o/VrIBzgBSAvOED/3JTILBE3mGzmXWW+LJQmkhbPYmJAgv3BT /dxml3IZPHogavL52N1xE1USW2LQTTKhkA3PFInRMuGQUho4obp9feaqBPDRElMxeQ H0XQJn+Jyc4SA== Date: Thu, 15 Oct 2026 02:37:42 +0000 To: Nanzhe Zhao Message-ID: References: <20261014064445.2835813-1-zhaonanzhe@xiaomi.com> <20261014064445.2835813-3-zhaonanzhe@xiaomi.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20261014064445.2835813-3-zhaonanzhe@xiaomi.com> X-Headers-End: 1xHBLq-00033t-AA Subject: Re: [f2fs-dev] [PATCH v5 02/16] f2fs: carry subpage offset and count in write IO X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Jaegeuk Kim via Linux-f2fs-devel Reply-To: Jaegeuk Kim Cc: Barry Song , Nanzhe Zhao , Juan Yescas , Daeho Jeong , linux-kernel@vger.kernel.org, Dev Jain , David Hildenbrand , Pengfei Li , Bo Zhang , Kalesh Singh , Nanzhe Zhao , linux-f2fs-devel@lists.sourceforge.net, Ryan Roberts Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net On 10/14, Nanzhe Zhao wrote: > Large folio write paths need to submit I/O for a range inside a > folio instead of always submitting the whole folio from offset zero. > Add folio_offset and folio_blkcnt to f2fs_io_info to describe the > block offset inside the folio and the number of contiguous blocks > covered by the I/O. > > Apply the new fields to the bio submit paths that need the subpage > offset or contiguous block count. > > Signed-off-by: Nanzhe Zhao > --- > fs/f2fs/checkpoint.c | 2 ++ > fs/f2fs/compress.c | 1 + > fs/f2fs/data.c | 65 ++++++++++++++++++++++++++++++-------------- > fs/f2fs/f2fs.h | 11 ++++++++ > fs/f2fs/gc.c | 2 ++ > fs/f2fs/inline.c | 1 + > fs/f2fs/segment.c | 3 +- > 7 files changed, 64 insertions(+), 21 deletions(-) > > diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c > index 5c5b45d3c67b..3ad709f69893 100644 > --- a/fs/f2fs/checkpoint.c > +++ b/fs/f2fs/checkpoint.c > @@ -264,6 +264,7 @@ static struct f2fs_cached_block *__get_meta_cache(struct f2fs_sb_info *sbi, > .op_flags = REQ_META | REQ_PRIO, > .old_blkaddr = index, > .new_blkaddr = index, > + .folio_blkcnt = 1, > .encrypted_page = NULL, > .is_por = !is_meta ? 1 : 0, > .is_cache = 1, > @@ -462,6 +463,7 @@ int f2fs_ra_meta_caches(struct f2fs_sb_info *sbi, block_t start, > .type = META, > .op = REQ_OP_READ, > .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD, > + .folio_blkcnt = 1, > .encrypted_page = NULL, > .in_list = 0, > .is_por = (type == META_POR) ? 1 : 0, > diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c > index 747141c79900..c0e39f580993 100644 > --- a/fs/f2fs/compress.c > +++ b/fs/f2fs/compress.c > @@ -1282,6 +1282,7 @@ static int f2fs_write_compressed_pages(struct compress_ctx *cc, > .op_flags = wbc_to_write_flags(wbc), > .old_blkaddr = NEW_ADDR, > .page = NULL, > + .folio_blkcnt = 1, > .encrypted_page = NULL, > .compressed_page = NULL, > .io_type = io_type, > diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c > index 95212e60f09d..429fe8998ca3 100644 > --- a/fs/f2fs/data.c > +++ b/fs/f2fs/data.c > @@ -849,6 +849,9 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio) > struct folio *fio_folio = fio->folio; > struct folio *data_folio = fio->encrypted_page ? > page_folio(fio->encrypted_page) : fio_folio; > + pgoff_t fio_lblk = F2FS_FIO_LBLK(fio); > + size_t bio_offset = F2FS_FIO_BIO_OFFSET(fio); > + size_t bio_len = F2FS_FIO_BIO_SIZE(fio); > > if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, > fio->is_por ? META_POR : (__is_meta_io(fio) ? > @@ -861,11 +864,11 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio) > bio = __bio_alloc(fio, 1); > > f2fs_set_bio_crypt_ctx(bio, fio_folio->mapping->host, > - fio_folio->index, fio, GFP_NOIO); > - bio_add_folio_nofail(bio, data_folio, folio_size(data_folio), 0); > + fio_lblk, fio, GFP_NOIO); > + bio_add_folio_nofail(bio, data_folio, bio_len, bio_offset); bio_len is coming from fio->folio. But, we need to get from data_folio? > > if (fio->io_wbc && !is_read_io(fio->op)) > - wbc_account_cgroup_owner(fio->io_wbc, fio_folio, PAGE_SIZE); > + wbc_account_cgroup_owner(fio->io_wbc, fio_folio, bio_len); > > inc_cache_count(fio->sbi, is_read_io(fio->op) ? > F2FS_RD_DATA : WB_DATA_TYPE(fio->folio, false)); > @@ -924,7 +927,8 @@ static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio, > } > > static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio, > - struct folio *folio, enum temp_type temp) > + struct folio *folio, size_t len, size_t offset, > + enum temp_type temp) > { > struct f2fs_bio_info *io = sbi->write_io[DATA] + temp; > struct bio_entry *be; > @@ -933,7 +937,7 @@ static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio, > be->bio = bio; > bio_get(bio); > > - bio_add_folio_nofail(bio, folio, folio_size(folio), 0); > + bio_add_folio_nofail(bio, folio, len, offset); > > f2fs_down_write(&io->bio_list_lock); > list_add_tail(&be->list, &io->bio_list); > @@ -950,6 +954,9 @@ static int add_ipu_page(struct f2fs_io_info *fio, struct bio **bio, > struct folio *folio) > { > struct folio *fio_folio = fio->folio; > + pgoff_t fio_lblk = F2FS_FIO_LBLK(fio); > + size_t bio_offset = F2FS_FIO_BIO_OFFSET(fio); > + size_t bio_len = F2FS_FIO_BIO_SIZE(fio); > struct f2fs_sb_info *sbi = fio->sbi; > enum temp_type temp; > bool found = false; > @@ -972,8 +979,8 @@ static int add_ipu_page(struct f2fs_io_info *fio, struct bio **bio, > fio->new_blkaddr)); > if (f2fs_crypt_mergeable_bio(*bio, > fio_folio->mapping->host, > - fio_folio->index, fio) && > - bio_add_folio(*bio, folio, folio_size(folio), 0)) { > + fio_lblk, fio) && > + bio_add_folio(*bio, folio, bio_len, bio_offset)) { > ret = 0; > break; > } > @@ -1087,6 +1094,10 @@ int f2fs_merge_page_bio(struct f2fs_io_info *fio) > struct folio *data_folio = fio->encrypted_page ? > page_folio(fio->encrypted_page) : fio->folio; > struct folio *folio = fio->folio; > + pgoff_t fio_lblk = F2FS_FIO_LBLK(fio); > + unsigned int fio_cnt = F2FS_FIO_BLKCNT(fio); > + size_t bio_offset = F2FS_FIO_BIO_OFFSET(fio); > + size_t bio_len = F2FS_FIO_BIO_SIZE(fio); > > if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, > __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC)) > @@ -1101,20 +1112,21 @@ int f2fs_merge_page_bio(struct f2fs_io_info *fio) > if (!bio) { > bio = __bio_alloc(fio, BIO_MAX_VECS); > f2fs_set_bio_crypt_ctx(bio, folio->mapping->host, > - folio->index, fio, GFP_NOIO); > + fio_lblk, fio, GFP_NOIO); > > - add_bio_entry(fio->sbi, bio, data_folio, fio->temp); > + add_bio_entry(fio->sbi, bio, data_folio, bio_len, > + bio_offset, fio->temp); This needs to be from data_folio? > } else { > if (add_ipu_page(fio, &bio, data_folio)) > goto alloc_new; > } > > if (fio->io_wbc) > - wbc_account_cgroup_owner(fio->io_wbc, folio, folio_size(folio)); > + wbc_account_cgroup_owner(fio->io_wbc, folio, bio_len); > > inc_cache_count(fio->sbi, WB_DATA_TYPE(folio, false)); > > - *fio->last_block = fio->new_blkaddr; > + *fio->last_block = fio->new_blkaddr + fio_cnt - 1; > *fio->bio = bio; > > return 0; > @@ -1177,6 +1189,10 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio) > struct folio *bio_folio; > struct f2fs_lock_context lc; > enum count_type type; > + pgoff_t fio_lblk; > + unsigned int fio_cnt; > + size_t bio_offset; > + size_t bio_len; > > f2fs_bug_on(sbi, is_read_io(fio->op)); > > @@ -1209,24 +1225,31 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio) > /* set submitted = true as a return value */ > fio->submitted = 1; > > + fio_lblk = F2FS_FIO_LBLK(fio); > + fio_cnt = F2FS_FIO_BLKCNT(fio); > + > type = WB_DATA_TYPE(bio_folio, fio->compressed_page); > - inc_cache_count(sbi, type); > + for (unsigned int i = 0; i < fio_cnt; i++) > + inc_cache_count(sbi, type); > > if (io->bio && > (!io_is_mergeable(sbi, io->bio, io, fio, io->last_block_in_bio, > fio->new_blkaddr) || > !f2fs_crypt_mergeable_bio(io->bio, fio_inode(fio), > - bio_folio->index, fio))) > + fio_lblk, fio))) >From bio_folio? > __submit_merged_bio(io); > alloc_new: > if (io->bio == NULL) { > io->bio = __bio_alloc(fio, BIO_MAX_VECS); > f2fs_set_bio_crypt_ctx(io->bio, fio_inode(fio), > - bio_folio->index, fio, GFP_NOIO); > + fio_lblk, fio, GFP_NOIO); >From bio_folio? > io->fio = *fio; > } > > - if (!bio_add_folio(io->bio, bio_folio, folio_size(bio_folio), 0)) { > + bio_offset = F2FS_FIO_BIO_OFFSET(fio); > + bio_len = F2FS_FIO_BIO_SIZE(fio); > + > + if (!bio_add_folio(io->bio, bio_folio, bio_len, bio_offset)) { bio_len/bio_offset need to be from bio_folio? > __submit_merged_bio(io); > goto alloc_new; > } > @@ -1234,10 +1257,9 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio) > F2FS_BIO(io->bio)->entry_cnt++; > > if (fio->io_wbc) > - wbc_account_cgroup_owner(fio->io_wbc, fio->folio, > - folio_size(fio->folio)); > + wbc_account_cgroup_owner(fio->io_wbc, fio->folio, bio_len); > > - io->last_block_in_bio = fio->new_blkaddr; > + io->last_block_in_bio = fio->new_blkaddr + fio_cnt - 1; > > trace_f2fs_submit_folio_write(fio->folio, fio); > #ifdef CONFIG_BLK_DEV_ZONED > @@ -3213,7 +3235,8 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio) > set_new_dnode(&dn, inode, NULL, NULL, 0); > > if (need_inplace_update(fio) && > - f2fs_lookup_read_extent_cache_block(inode, folio->index, > + f2fs_lookup_read_extent_cache_block(inode, > + F2FS_FIO_LBLK(fio), > &fio->old_blkaddr)) { > if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr, > DATA_GENERIC_ENHANCE)) > @@ -3232,7 +3255,8 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio) > if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi, &lc)) > return -EAGAIN; > > - err = f2fs_get_dnode_of_data(&dn, folio->index, LOOKUP_NODE); > + err = f2fs_get_dnode_of_data(&dn, F2FS_FIO_LBLK(fio), > + LOOKUP_NODE); > if (err) > goto out; > > @@ -3335,6 +3359,7 @@ int f2fs_write_single_data_page(struct folio *folio, int *submitted, > .op_flags = wbc_to_write_flags(wbc), > .old_blkaddr = NULL_ADDR, > .folio = folio, > + .folio_blkcnt = 1, > .encrypted_page = NULL, > .submitted = 0, > .compr_blocks = compr_blocks, > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h > index 2fb8ebfa1303..963cd2cdf7ba 100644 > --- a/fs/f2fs/f2fs.h > +++ b/fs/f2fs/f2fs.h > @@ -1350,6 +1350,8 @@ struct f2fs_io_info { > blk_opf_t op_flags; /* req_flag_bits */ > block_t new_blkaddr; /* new block address to be written */ > block_t old_blkaddr; /* old block address before Cow */ > + pgoff_t folio_offset; /* offset in large folio */ > + unsigned int folio_blkcnt; /* block count in large folio */ > union { > struct page *page; /* page to be written */ > struct folio *folio; > @@ -1372,6 +1374,15 @@ struct f2fs_io_info { > sector_t *last_block; /* last block number in bio */ > }; > > +#define F2FS_FIO_LBLK(fio) \ > + (((fio)->folio)->index + (fio)->folio_offset) > +#define F2FS_FIO_BLKCNT(fio) \ > + ((fio)->folio_blkcnt) > +#define F2FS_FIO_BIO_OFFSET(fio) \ > + ((fio)->folio_offset << PAGE_SHIFT) > +#define F2FS_FIO_BIO_SIZE(fio) \ > + F2FS_BLK_TO_BYTES((fio)->sbi, F2FS_FIO_BLKCNT(fio)) > + > struct bio_entry { > struct bio *bio; > struct list_head list; > diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c > index 926e6976bc22..89e50f871b75 100644 > --- a/fs/f2fs/gc.c > +++ b/fs/f2fs/gc.c > @@ -1228,6 +1228,7 @@ static int ra_data_block(struct inode *inode, pgoff_t index) > .temp = COLD, > .op = REQ_OP_READ, > .op_flags = 0, > + .folio_blkcnt = 1, > .encrypted_page = NULL, > .in_list = 0, > .is_cache = 1, > @@ -1338,6 +1339,7 @@ static int move_data_block(struct inode *inode, block_t bidx, > .temp = COLD, > .op = REQ_OP_READ, > .op_flags = 0, > + .folio_blkcnt = 1, > .encrypted_page = NULL, > .in_list = 0, > .is_cache = 1, > diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c > index 273b6428c9f9..ab7537ff7ebd 100644 > --- a/fs/f2fs/inline.c > +++ b/fs/f2fs/inline.c > @@ -151,6 +151,7 @@ int f2fs_convert_inline_folio(struct dnode_of_data *dn, struct folio *folio) > .op = REQ_OP_WRITE, > .op_flags = REQ_SYNC | REQ_PRIO, > .folio = folio, > + .folio_blkcnt = 1, > .encrypted_page = NULL, > .io_type = FS_DATA_IO, > }; > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c > index 25785b7626bb..96bfb7d63692 100644 > --- a/fs/f2fs/segment.c > +++ b/fs/f2fs/segment.c > @@ -3876,7 +3876,8 @@ static int __get_segment_type_6(struct f2fs_io_info *fio) > if (file_is_cold(inode) || f2fs_need_compress_data(inode)) > return CURSEG_COLD_DATA; > > - type = __get_age_segment_type(inode, fio->folio->index); > + type = __get_age_segment_type(inode, > + F2FS_FIO_LBLK(fio)); > if (type != NO_CHECK_TYPE) > return type; > > -- > 2.43.0 > > > > _______________________________________________ > 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