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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-06-04 21:21:28 (GMT) |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-06-08 17:25:50 (GMT) |
| commit | 7dfeaa32204841aade36ba243a1cb45c54f42c15 (patch) | |
| tree | 10e5a6d48e85bdba1158e6a1b599812fda3edd5e | |
| parent | 7f319975ccea80cf03377ff579b0a9e613308570 (diff) | |
| download | linux-7dfeaa32204841aade36ba243a1cb45c54f42c15.tar.xz | |
f2fs: avoid reverse IO order for NODE and DATA
There is a data race between allocate_data_block() and f2fs_sbumit_page_mbio(),
which incur unnecessary reversed bio submission.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 | ||||
| -rw-r--r-- | fs/f2fs/segment.c | 6 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 2 |
3 files changed, 9 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index e21f9df..24c7cde 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -766,6 +766,7 @@ struct f2fs_sb_info { /* for bio operations */ struct f2fs_bio_info read_io; /* for read bios */ struct f2fs_bio_info write_io[NR_PAGE_TYPE]; /* for write bios */ + struct mutex wio_mutex[NODE + 1]; /* bio ordering for NODE/DATA */ /* for checkpoint */ struct f2fs_checkpoint *ckpt; /* raw checkpoint pointer */ diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index 9011bffd..7b58bfb 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -1399,11 +1399,17 @@ static void do_write_page(struct f2fs_summary *sum, struct f2fs_io_info *fio) { int type = __get_segment_type(fio->page, fio->type); + if (fio->type == NODE || fio->type == DATA) + mutex_lock(&fio->sbi->wio_mutex[fio->type]); + allocate_data_block(fio->sbi, fio->page, fio->old_blkaddr, &fio->new_blkaddr, sum, type); /* writeout dirty page into bdev */ f2fs_submit_page_mbio(fio); + + if (fio->type == NODE || fio->type == DATA) + mutex_unlock(&fio->sbi->wio_mutex[fio->type]); } 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 94bb87d..dc66f16 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -1436,6 +1436,8 @@ static void init_sb_info(struct f2fs_sb_info *sbi) INIT_LIST_HEAD(&sbi->s_list); mutex_init(&sbi->umount_mutex); + mutex_init(&sbi->wio_mutex[NODE]); + mutex_init(&sbi->wio_mutex[DATA]); #ifdef CONFIG_F2FS_FS_ENCRYPTION memcpy(sbi->key_prefix, F2FS_KEY_DESC_PREFIX, |