From: Mikulas Patocka <mpatocka@redhat.com>
To: JeffleXu <jefflexu@linux.alibaba.com>,
Mike Snitzer <msnitzer@redhat.com>,
Heinz Mauelshagen <heinzm@redhat.com>,
axboe@kernel.dk, caspar@linux.alibaba.com,
io-uring@vger.kernel.org, linux-block@vger.kernel.org,
joseph.qi@linux.alibaba.com, dm-devel@redhat.com, hch@lst.de
Cc: Mikulas Patocka <mpatocka@redhat.com>
Subject: [PATCH 4/4] dm: support I/O polling
Date: Tue, 02 Mar 2021 20:05:17 +0100 [thread overview]
Message-ID: <20210302190555.201228400@debian-a64.vm> (raw)
[-- Attachment #1: dm-poll.patch --]
[-- Type: text/plain, Size: 760 bytes --]
Support I/O polling if submit_bio_noacct_mq_direct returned non-empty
cookie.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
---
drivers/md/dm.c | 5 +++++
1 file changed, 5 insertions(+)
Index: linux-2.6/drivers/md/dm.c
===================================================================
--- linux-2.6.orig/drivers/md/dm.c 2021-03-02 19:26:34.000000000 +0100
+++ linux-2.6/drivers/md/dm.c 2021-03-02 19:26:34.000000000 +0100
@@ -1682,6 +1682,11 @@ static void __split_and_process_bio(stru
}
}
+ if (ci.poll_cookie != BLK_QC_T_NONE) {
+ while (atomic_read(&ci.io->io_count) > 1 &&
+ blk_poll(ci.poll_queue, ci.poll_cookie, true)) ;
+ }
+
/* drop the extra reference count */
dec_pending(ci.io, errno_to_blk_status(error));
}
next reply other threads:[~2021-03-02 23:52 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-02 19:05 Mikulas Patocka [this message]
2021-03-03 2:53 ` [dm-devel] [PATCH 4/4] dm: support I/O polling JeffleXu
2021-03-03 10:09 ` Mikulas Patocka
2021-03-04 2:57 ` JeffleXu
2021-03-04 10:09 ` Mikulas Patocka
2021-03-05 18:21 ` Jens Axboe
2021-03-04 15:01 ` Jeff Moyer
2021-03-04 15:11 ` Mike Snitzer
2021-03-04 15:12 ` [dm-devel] " Mikulas Patocka
2021-03-05 9:52 ` JeffleXu
2021-03-05 17:46 ` Heinz Mauelshagen
2021-03-05 17:56 ` Heinz Mauelshagen
2021-03-05 18:09 ` Mike Snitzer
2021-03-05 18:19 ` [dm-devel] " Heinz Mauelshagen
2021-03-08 3:54 ` JeffleXu
2021-03-08 3:55 ` Jens Axboe
2021-03-09 11:42 ` Heinz Mauelshagen
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