summaryrefslogtreecommitdiff
path: root/fs/direct-io.c
diff options
context:
space:
mode:
authorBart Van Assche <bvanassche@acm.org>2024-02-02 23:39:25 +0300
committerChristian Brauner <brauner@kernel.org>2024-02-06 16:31:05 +0300
commit449813515d3e5efec85206bb91588a6249a421a3 (patch)
tree2328b6cedb4a82d0de3a8089054e6a7be176073f /fs/direct-io.c
parentea7d898676d9e94558c46ba927db35403362389f (diff)
downloadlinux-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.c2
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;
}