linux-kernel - [PATCH RFC 2/2] fs/direct-io: pass NOWAIT to also for read requests

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Date:   Mon, 04 May 2020 18:54:57 +0300
From:   Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
To:     linux-kernel@...r.kernel.org, linux-block@...r.kernel.org
Cc:     Jens Axboe <axboe@...nel.dk>, Christoph Hellwig <hch@...radead.org>
Subject: [PATCH RFC 2/2] fs/direct-io: pass NOWAIT to also for read requests

For some reason NOWAIT currently is passed only for writes.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
Fixes: 03a07c92a9ed ("block: return on congested block device")
---
 fs/direct-io.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/direct-io.c b/fs/direct-io.c
index 00b4d15bb811..dbb6afef6be9 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1234,11 +1234,11 @@ do_blockdev_direct_IO(struct kiocb *iocb, struct inode *inode,
 	if (iov_iter_rw(iter) == WRITE) {
 		dio->op = REQ_OP_WRITE;
 		dio->op_flags = REQ_SYNC | REQ_IDLE;
-		if (iocb->ki_flags & IOCB_NOWAIT)
-			dio->op_flags |= REQ_NOWAIT;
 	} else {
 		dio->op = REQ_OP_READ;
 	}
+	if (iocb->ki_flags & IOCB_NOWAIT)
+		dio->op_flags |= REQ_NOWAIT;
 	if (iocb->ki_flags & IOCB_HIPRI)
 		dio->op_flags |= REQ_HIPRI;