On 2019/7/12 16:55, Chao Yu wrote:
> Wrap merge condition into function for readability, no logic change.
>
> Signed-off-by: Chao Yu <yuch...@huawei.com>
> ---
> v2: remove bio validation check in page_is_mergeable().
> fs/f2fs/data.c | 40 +++++++++++++++++++++++++++++++++-------
> 1 file changed, 33 insertions(+), 7 deletions(-)
>
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index 6a8db4abdf5f..f1e401f9fc13 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -482,6 +482,33 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
> return 0;
> }
>
> +static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
> + block_t last_blkaddr, block_t cur_blkaddr)
> +{
> + if (last_blkaddr != cur_blkaddr)
if (last_blkaddr + 1 != cur_blkaddr)
Merge condition is wrong here.
> + return false;
> + return __same_bdev(sbi, cur_blkaddr, bio);
> +}
> +
> +static bool io_type_is_mergeable(struct f2fs_bio_info *io,
> + struct f2fs_io_info *fio)
> +{
> + if (io->fio.op != fio->op)
> + return false;
> + return io->fio.op_flags == fio->op_flags;
> +}
> +
> +static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
> + struct f2fs_bio_info *io,
> + struct f2fs_io_info *fio,
> + block_t last_blkaddr,
> + block_t cur_blkaddr)
> +{
> + if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
> + return false;
> + return io_type_is_mergeable(io, fio);
> +}
> +
> int f2fs_merge_page_bio(struct f2fs_io_info *fio)
> {
> struct bio *bio = *fio->bio;
> @@ -495,8 +522,8 @@ int f2fs_merge_page_bio(struct f2fs_io_info *fio)
> 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))) {
> + if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
> + fio->new_blkaddr)) {
> __submit_bio(fio->sbi, bio, fio->type);
> bio = NULL;
> }
> @@ -569,9 +596,8 @@ void f2fs_submit_page_write(struct f2fs_io_info *fio)
>
> inc_page_count(sbi, WB_DATA_TYPE(bio_page));
>
> - if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 ||
> - (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) ||
> - !__same_bdev(sbi, fio->new_blkaddr, io->bio)))
> + if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio,
> + io->last_block_in_bio, fio->new_blkaddr))
> __submit_merged_bio(io);
> alloc_new:
> if (io->bio == NULL) {
> @@ -1643,8 +1669,8 @@ static int f2fs_read_single_page(struct inode *inode,
> struct page *page,
> * This page will go to BIO. Do we need to send this
> * BIO off first?
> */
> - if (bio && (*last_block_in_bio != block_nr - 1 ||
> - !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) {
> + if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio,
> + *last_block_in_bio, block_nr - 1)) {
*last_block_in_bio, block_nr)
Sorry, anyway, let me send v2.
> submit_and_realloc:
> __submit_bio(F2FS_I_SB(inode), bio, DATA);
> bio = NULL;
>
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