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| author | Chao Yu <yuchao0@huawei.com> | 2018-05-26 09:00:13 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2018-05-31 11:31:51 -0700 |
| commit | 107a805de87ec071dab602071c14e67b98b0c519 (patch) | |
| tree | 543c688ea92b6651a9bb03b4a7bd09d728aab754 /fs/f2fs | |
| parent | e5e5732d8120654159254c16834bc8663d8be124 (diff) | |
| download | linux-107a805de87ec071dab602071c14e67b98b0c519.tar.gz linux-107a805de87ec071dab602071c14e67b98b0c519.tar.bz2 linux-107a805de87ec071dab602071c14e67b98b0c519.zip | |
f2fs: keep migration IO order in LFS mode
For non-migration IO, we will keep order of data/node blocks' submitting
as allocation sequence by sorting IOs in per log io_list list, but for
migration IO, it could be out-of-order.
In LFS mode, we should keep all IOs including migration IO be ordered,
so that this patch fixes to add an additional lock to keep submitting
order.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Yunlong Song <yunlong.song@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/f2fs.h | 2 | ||||
| -rw-r--r-- | fs/f2fs/gc.c | 6 | ||||
| -rw-r--r-- | fs/f2fs/segment.c | 5 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 1 |
4 files changed, 14 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 33c060d87a88..24eab9622ad1 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -1114,6 +1114,8 @@ struct f2fs_sb_info { struct f2fs_bio_info *write_io[NR_PAGE_TYPE]; /* for write bios */ struct mutex wio_mutex[NR_PAGE_TYPE - 1][NR_TEMP_TYPE]; /* bio ordering for NODE/DATA */ + /* keep migration IO order for LFS mode */ + struct rw_semaphore io_order_lock; mempool_t *write_io_dummy; /* Dummy pages */ /* for checkpoint */ diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 9bb2ddbbed1e..ec9b1579c510 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -614,6 +614,7 @@ static void move_data_block(struct inode *inode, block_t bidx, struct page *page; block_t newaddr; int err; + bool lfs_mode = test_opt(fio.sbi, LFS); /* do not read out */ page = f2fs_grab_cache_page(inode->i_mapping, bidx, false); @@ -654,6 +655,9 @@ static void move_data_block(struct inode *inode, block_t bidx, fio.page = page; fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; + if (lfs_mode) + down_write(&fio.sbi->io_order_lock); + allocate_data_block(fio.sbi, NULL, fio.old_blkaddr, &newaddr, &sum, CURSEG_COLD_DATA, NULL, false); @@ -710,6 +714,8 @@ static void move_data_block(struct inode *inode, block_t bidx, put_page_out: f2fs_put_page(fio.encrypted_page, 1); recover_block: + if (lfs_mode) + up_write(&fio.sbi->io_order_lock); if (err) __f2fs_replace_block(fio.sbi, &sum, newaddr, fio.old_blkaddr, true, true); diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 8fabf3a34bd7..9f27e9b64c1c 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -2750,7 +2750,10 @@ static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio) { int type = __get_segment_type(fio); int err; + bool keep_order = (test_opt(fio->sbi, LFS) && type == CURSEG_COLD_DATA); + if (keep_order) + down_read(&fio->sbi->io_order_lock); reallocate: allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr, &fio->new_blkaddr, sum, type, fio, true); @@ -2763,6 +2766,8 @@ reallocate: } else if (!err) { update_device_state(fio); } + if (keep_order) + up_read(&fio->sbi->io_order_lock); } void write_meta_page(struct f2fs_sb_info *sbi, struct page *page, diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 51dca3932e8d..12282b144651 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -2369,6 +2369,7 @@ static void init_sb_info(struct f2fs_sb_info *sbi) for (i = 0; i < NR_PAGE_TYPE - 1; i++) for (j = HOT; j < NR_TEMP_TYPE; j++) mutex_init(&sbi->wio_mutex[i][j]); + init_rwsem(&sbi->io_order_lock); spin_lock_init(&sbi->cp_lock); sbi->dirty_device = 0; |