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From: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>, Christoph Hellwig <hch@infradead.org>
Subject: [PATCH RFC 1/2] fs/iomap/direct-io: pass NOWAIT to bio flags
Date: Mon, 04 May 2020 18:54:53 +0300	[thread overview]
Message-ID: <158860769311.32485.8003552176738816448.stgit@buzz> (raw)

This is required to avoid waiting in lower layers.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
---
 fs/iomap/direct-io.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c
index 20dde5aadcdd..9b53fa7651e3 100644
--- a/fs/iomap/direct-io.c
+++ b/fs/iomap/direct-io.c
@@ -63,6 +63,8 @@ static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap,
 {
 	atomic_inc(&dio->ref);
 
+	if (dio->iocb->ki_flags & IOCB_NOWAIT)
+		bio->bi_opf |= REQ_NOWAIT;
 	if (dio->iocb->ki_flags & IOCB_HIPRI)
 		bio_set_polled(bio, dio->iocb);
 


             reply	other threads:[~2020-05-04 15:54 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-04 15:54 Konstantin Khlebnikov [this message]
2020-05-04 15:54 ` [PATCH RFC 2/2] fs/direct-io: pass NOWAIT to also for read requests Konstantin Khlebnikov
2020-05-06 14:40   ` Christoph Hellwig
2020-05-04 16:00 ` [PATCH RFC 1/2] fs/iomap/direct-io: pass NOWAIT to bio flags Christoph Hellwig
2020-05-04 16:23   ` Konstantin Khlebnikov
2020-05-06 14:40     ` Christoph Hellwig
2020-05-06 14:40 ` Christoph Hellwig

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