From 8648de2c581eeda7e412d6e38bf19e25bbb795ba Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Tue, 19 Feb 2019 16:15:29 +0800 Subject: f2fs: add bio cache for IPU SQLite in Wal mode may trigger sequential IPU write in db-wal file, after commit d1b3e72d5490 ("f2fs: submit bio of in-place-update pages"), we lost the chance of merging page in inner managed bio cache, result in submitting more small-sized IO. So let's add temporary bio in writepages() to cache mergeable write IO as much as possible. Test case: 1. xfs_io -f /mnt/f2fs/file -c "pwrite 0 65536" -c "fsync" 2. xfs_io -f /mnt/f2fs/file -c "pwrite 0 65536" -c "fsync" Before: f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65544, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65552, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65560, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65568, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65576, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65584, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65592, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65600, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65608, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65616, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65624, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65632, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65640, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65648, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65656, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65664, size = 4096 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), NODE, sector = 57352, size = 4096 After: f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), DATA, sector = 65544, size = 65536 f2fs_submit_write_bio: dev = (251,0)/(251,0), rw = WRITE(S), NODE, sector = 57368, size = 4096 Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim --- fs/f2fs/data.c | 88 ++++++++++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 79 insertions(+), 9 deletions(-) (limited to 'fs/f2fs/data.c') diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index eda4181d2092..03ea11f8a3c3 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -347,20 +347,20 @@ static void __submit_merged_bio(struct f2fs_bio_info *io) io->bio = NULL; } -static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, +static bool __has_merged_page(struct bio *bio, struct inode *inode, struct page *page, nid_t ino) { struct bio_vec *bvec; struct page *target; struct bvec_iter_all iter_all; - if (!io->bio) + if (!bio) return false; if (!inode && !page && !ino) return true; - bio_for_each_segment_all(bvec, io->bio, iter_all) { + bio_for_each_segment_all(bvec, bio, iter_all) { if (bvec->bv_page->mapping) target = bvec->bv_page; @@ -411,7 +411,7 @@ static void __submit_merged_write_cond(struct f2fs_sb_info *sbi, struct f2fs_bio_info *io = sbi->write_io[btype] + temp; down_read(&io->io_rwsem); - ret = __has_merged_page(io, inode, page, ino); + ret = __has_merged_page(io->bio, inode, page, ino); up_read(&io->io_rwsem); } if (ret) @@ -481,6 +481,61 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio) return 0; } +int f2fs_merge_page_bio(struct f2fs_io_info *fio) +{ + struct bio *bio = *fio->bio; + struct page *page = fio->encrypted_page ? + fio->encrypted_page : fio->page; + + if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, + __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC)) + return -EFAULT; + + trace_f2fs_submit_page_bio(page, fio); + f2fs_trace_ios(fio, 0); + + if (bio && (*fio->last_block + 1 != fio->new_blkaddr || + !__same_bdev(fio->sbi, fio->new_blkaddr, bio))) { + __submit_bio(fio->sbi, bio, fio->type); + bio = NULL; + } +alloc_new: + if (!bio) { + bio = __bio_alloc(fio->sbi, fio->new_blkaddr, fio->io_wbc, + BIO_MAX_PAGES, false, fio->type, fio->temp); + bio_set_op_attrs(bio, fio->op, fio->op_flags); + } + + if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { + __submit_bio(fio->sbi, bio, fio->type); + bio = NULL; + goto alloc_new; + } + + if (fio->io_wbc) + wbc_account_io(fio->io_wbc, page, PAGE_SIZE); + + inc_page_count(fio->sbi, WB_DATA_TYPE(page)); + + *fio->last_block = fio->new_blkaddr; + *fio->bio = bio; + + return 0; +} + +static void f2fs_submit_ipu_bio(struct f2fs_sb_info *sbi, struct bio **bio, + struct page *page) +{ + if (!bio) + return; + + if (!__has_merged_page(*bio, NULL, page, 0)) + return; + + __submit_bio(sbi, *bio, DATA); + *bio = NULL; +} + void f2fs_submit_page_write(struct f2fs_io_info *fio) { struct f2fs_sb_info *sbi = fio->sbi; @@ -1947,6 +2002,8 @@ out: } static int __write_data_page(struct page *page, bool *submitted, + struct bio **bio, + sector_t *last_block, struct writeback_control *wbc, enum iostat_type io_type) { @@ -1972,6 +2029,8 @@ static int __write_data_page(struct page *page, bool *submitted, .need_lock = LOCK_RETRY, .io_type = io_type, .io_wbc = wbc, + .bio = bio, + .last_block = last_block, }; trace_f2fs_writepage(page, DATA); @@ -2070,10 +2129,13 @@ out: unlock_page(page); if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) && - !F2FS_I(inode)->cp_task) + !F2FS_I(inode)->cp_task) { + f2fs_submit_ipu_bio(sbi, bio, page); f2fs_balance_fs(sbi, need_balance_fs); + } if (unlikely(f2fs_cp_error(sbi))) { + f2fs_submit_ipu_bio(sbi, bio, page); f2fs_submit_merged_write(sbi, DATA); submitted = NULL; } @@ -2100,7 +2162,7 @@ redirty_out: static int f2fs_write_data_page(struct page *page, struct writeback_control *wbc) { - return __write_data_page(page, NULL, wbc, FS_DATA_IO); + return __write_data_page(page, NULL, NULL, NULL, wbc, FS_DATA_IO); } /* @@ -2116,6 +2178,8 @@ static int f2fs_write_cache_pages(struct address_space *mapping, int done = 0; struct pagevec pvec; struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); + struct bio *bio = NULL; + sector_t last_block; int nr_pages; pgoff_t uninitialized_var(writeback_index); pgoff_t index; @@ -2192,17 +2256,20 @@ continue_unlock: } if (PageWriteback(page)) { - if (wbc->sync_mode != WB_SYNC_NONE) + if (wbc->sync_mode != WB_SYNC_NONE) { f2fs_wait_on_page_writeback(page, DATA, true, true); - else + f2fs_submit_ipu_bio(sbi, &bio, page); + } else { goto continue_unlock; + } } if (!clear_page_dirty_for_io(page)) goto continue_unlock; - ret = __write_data_page(page, &submitted, wbc, io_type); + ret = __write_data_page(page, &submitted, &bio, + &last_block, wbc, io_type); if (unlikely(ret)) { /* * keep nr_to_write, since vfs uses this to @@ -2251,6 +2318,9 @@ continue_unlock: if (nwritten) f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host, NULL, 0, DATA); + /* submit cached bio of IPU write */ + if (bio) + __submit_bio(sbi, bio, DATA); return ret; } -- cgit v1.2.3-59-g8ed1b