diff options
| author | zhuxiaohui <zhuxiaohui400@gmail.com> | 2024-03-26 20:03:45 +0800 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2024-03-31 20:36:11 -0400 |
| commit | bb66009958b277a9baffaa53d835661852550151 (patch) | |
| tree | 56f5bfaead21b5f363ecfeb99efe04476c1d8bd4 | |
| parent | 79032b078173f87a13f8618cdab710798be67314 (diff) | |
| download | linux-bb66009958b277a9baffaa53d835661852550151.tar.gz | |
bcachefs: add REQ_SYNC and REQ_IDLE in write dio
when writing file with direct_IO on bcachefs, then performance is
much lower than other fs due to write back throttle in block layer:
wbt_wait+1
__rq_qos_throttle+32
blk_mq_submit_bio+394
submit_bio_noacct_nocheck+649
bch2_submit_wbio_replicas+538
__bch2_write+2539
bch2_direct_write+1663
bch2_write_iter+318
aio_write+355
io_submit_one+1224
__x64_sys_io_submit+169
do_syscall_64+134
entry_SYSCALL_64_after_hwframe+110
add set REQ_SYNC and REQ_IDLE in bio->bi_opf as standard dirct-io
Signed-off-by: zhuxiaohui <zhuxiaohui.400@bytedance.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
| -rw-r--r-- | fs/bcachefs/fs-io-direct.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/bcachefs/fs-io-direct.c b/fs/bcachefs/fs-io-direct.c index 33cb6da3a5ad28..f49e6c0f0f6835 100644 --- a/fs/bcachefs/fs-io-direct.c +++ b/fs/bcachefs/fs-io-direct.c @@ -536,7 +536,7 @@ static __always_inline long bch2_dio_write_loop(struct dio_write *dio) if (likely(!dio->iter.count) || dio->op.error) break; - bio_reset(bio, NULL, REQ_OP_WRITE); + bio_reset(bio, NULL, REQ_OP_WRITE | REQ_SYNC | REQ_IDLE); } out: return bch2_dio_write_done(dio); @@ -618,7 +618,7 @@ ssize_t bch2_direct_write(struct kiocb *req, struct iov_iter *iter) bio = bio_alloc_bioset(NULL, bio_iov_vecs_to_alloc(iter, BIO_MAX_VECS), - REQ_OP_WRITE, + REQ_OP_WRITE | REQ_SYNC | REQ_IDLE, GFP_KERNEL, &c->dio_write_bioset); dio = container_of(bio, struct dio_write, op.wbio.bio); |