From: Christoph Hellwig <hch@lst.de>
To: viro@zeniv.linux.org.uk, axboe@fb.com
Cc: milosz@adfin.com, linux-fsdevel@vger.kernel.org,
linux-block@vger.kernel.org, linux-api@vger.kernel.org
Subject: [PATCH 5/6] direct-io: only use block polling if explicitly requested
Date: Thu, 3 Mar 2016 16:04:02 +0100 [thread overview]
Message-ID: <1457017443-17662-6-git-send-email-hch@lst.de> (raw)
In-Reply-To: <1457017443-17662-1-git-send-email-hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Stephen Bates <stephen.bates@pmcs.com>
Tested-by: Stephen Bates <stephen.bates@pmcs.com>
Acked-by: Jeff Moyer <jmoyer@redhat.com>
---
fs/direct-io.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/direct-io.c b/fs/direct-io.c
index d6a9012..0a8d937 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -445,7 +445,8 @@ static struct bio *dio_await_one(struct dio *dio)
__set_current_state(TASK_UNINTERRUPTIBLE);
dio->waiter = current;
spin_unlock_irqrestore(&dio->bio_lock, flags);
- if (!blk_poll(bdev_get_queue(dio->bio_bdev), dio->bio_cookie))
+ if (!(dio->iocb->ki_flags & IOCB_HIPRI) ||
+ !blk_poll(bdev_get_queue(dio->bio_bdev), dio->bio_cookie))
io_schedule();
/* wake up sets us TASK_RUNNING */
spin_lock_irqsave(&dio->bio_lock, flags);
--
2.1.4
next prev parent reply other threads:[~2016-03-03 15:04 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-03 15:03 generic RDMA READ/WRITE API V2 Christoph Hellwig
2016-03-03 15:03 ` [PATCH 1/6] vfs: pass a flags argument to vfs_readv/vfs_writev Christoph Hellwig
2016-03-03 15:03 ` [PATCH 2/6] vfs: vfs: Define new syscalls preadv2,pwritev2 Christoph Hellwig
2016-03-10 18:15 ` Michael Kerrisk (man-pages)
2016-03-11 9:53 ` Christoph Hellwig
2016-04-18 13:51 ` Michael Kerrisk (man-pages)
2016-04-25 8:47 ` Christoph Hellwig
2016-04-25 17:35 ` Michael Kerrisk (man-pages)
2016-05-08 9:29 ` Christoph Hellwig
2016-03-03 15:04 ` [PATCH 3/6] x86: wire up preadv2 and pwritev2 Christoph Hellwig
2016-03-03 15:04 ` [PATCH 4/6] vfs: add the RWF_HIPRI flag for preadv2/pwritev2 Christoph Hellwig
2016-05-08 21:47 ` NeilBrown
2016-05-11 8:55 ` Christoph Hellwig
2016-03-03 15:04 ` Christoph Hellwig [this message]
2016-03-03 15:04 ` [PATCH 6/6] blk-mq: enable polling support by default Christoph Hellwig
2016-03-03 15:09 ` generic RDMA READ/WRITE API V2 Sagi Grimberg
2016-03-03 15:11 ` selective block polling and preadv2/pwritev2 revisited V3 Christoph Hellwig
2016-03-03 15:16 ` Jens Axboe
2016-03-03 15:52 ` Arnd Bergmann
2016-03-03 16:11 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2015-12-24 14:14 selective block polling and preadv2/pwritev2 revisited Christoph Hellwig
2015-12-24 14:14 ` [PATCH 5/6] direct-io: only use block polling if explicitly requested Christoph Hellwig
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