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| author | Pavel Begunkov <asml.silence@gmail.com> | 2020-11-20 17:10:28 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-04-02 08:34:30 -0600 |
| commit | f8b78caf21d5bc3fcfc40c18898f9d52ed1451a5 (patch) | |
| tree | a0647e87fb73c8e7599cff05766f93f38d603de9 /fs/block_dev.c | |
| parent | de3510e52b0a398261271455562458003b8eea62 (diff) | |
| download | linux-f8b78caf21d5bc3fcfc40c18898f9d52ed1451a5.tar.gz linux-f8b78caf21d5bc3fcfc40c18898f9d52ed1451a5.tar.bz2 linux-f8b78caf21d5bc3fcfc40c18898f9d52ed1451a5.zip | |
block: don't ignore REQ_NOWAIT for direct IO
If IOCB_NOWAIT is set on submission, then that needs to get propagated to
REQ_NOWAIT on the block side. Otherwise we completely lose this
information, and any issuer of IOCB_NOWAIT IO will potentially end up
blocking on eg request allocation on the storage side.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index 28d583fcdc2c..09d6f7229db9 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -275,6 +275,8 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter, bio.bi_opf = dio_bio_write_op(iocb); task_io_account_write(ret); } + if (iocb->ki_flags & IOCB_NOWAIT) + bio.bi_opf |= REQ_NOWAIT; if (iocb->ki_flags & IOCB_HIPRI) bio_set_polled(&bio, iocb); @@ -428,6 +430,8 @@ static ssize_t __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, bio->bi_opf = dio_bio_write_op(iocb); task_io_account_write(bio->bi_iter.bi_size); } + if (iocb->ki_flags & IOCB_NOWAIT) + bio->bi_opf |= REQ_NOWAIT; dio->size += bio->bi_iter.bi_size; pos += bio->bi_iter.bi_size; |