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[RESEND] ext4: Pass write-hint for buffered IO

Message ID 20241021053720.546045-1-j.xia@samsung.com
State New
Headers show
Series [RESEND] ext4: Pass write-hint for buffered IO | expand

Commit Message

Jing Xia Oct. 21, 2024, 5:37 a.m. UTC 
Commit 449813515d3e ("block, fs: Restore the per-bio/request data
lifetime fields") restored write-hint support in ext4. But that is
applicable only for direct IO. This patch supports passing
write-hint for buffered IO from ext4 file system to block layer
by filling bi_write_hint of struct bio in io_submit_add_bh().

Signed-off-by: Jing Xia <j.xia@samsung.com>
---
 fs/ext4/page-io.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index ad5543866d21..bb8b17c394d4 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -417,8 +417,10 @@  static void io_submit_add_bh(struct ext4_io_submit *io,
 submit_and_retry:
 		ext4_io_submit(io);
 	}
-	if (io->io_bio == NULL)
+	if (io->io_bio == NULL) {
 		io_submit_init_bio(io, bh);
+		io->io_bio->bi_write_hint = inode->i_write_hint;
+	}
 	if (!bio_add_folio(io->io_bio, io_folio, bh->b_size, bh_offset(bh)))
 		goto submit_and_retry;
 	wbc_account_cgroup_owner(io->io_wbc, &folio->page, bh->b_size);