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| author | Bart Van Assche <bvanassche@acm.org> | 2024-02-02 23:39:25 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2024-02-06 16:31:05 +0300 |
| commit | 449813515d3e5efec85206bb91588a6249a421a3 (patch) | |
| tree | 2328b6cedb4a82d0de3a8089054e6a7be176073f /fs/direct-io.c | |
| parent | ea7d898676d9e94558c46ba927db35403362389f (diff) | |
| download | linux-449813515d3e5efec85206bb91588a6249a421a3.tar.xz | |
block, fs: Restore the per-bio/request data lifetime fields
Restore support for passing data lifetime information from filesystems to
block drivers. This patch reverts commit b179c98f7697 ("block: Remove
request.write_hint") and commit c75e707fe1aa ("block: remove the
per-bio/request write hint").
This patch does not modify the size of struct bio because the new
bi_write_hint member fills a hole in struct bio. pahole reports the
following for struct bio on an x86_64 system with this patch applied:
/* size: 112, cachelines: 2, members: 20 */
/* sum members: 110, holes: 1, sum holes: 2 */
/* last cacheline: 48 bytes */
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240202203926.2478590-7-bvanassche@acm.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/direct-io.c')
| -rw-r--r-- | fs/direct-io.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/direct-io.c b/fs/direct-io.c index 60456263a338..62c97ff9e852 100644 --- a/fs/direct-io.c +++ b/fs/direct-io.c @@ -410,6 +410,8 @@ dio_bio_alloc(struct dio *dio, struct dio_submit *sdio, bio->bi_end_io = dio_bio_end_io; if (dio->is_pinned) bio_set_flag(bio, BIO_PAGE_PINNED); + bio->bi_write_hint = file_inode(dio->iocb->ki_filp)->i_write_hint; + sdio->bio = bio; sdio->logical_offset_in_bio = sdio->cur_page_fs_offset; } |