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* [PATCH 4/4] dm: support I/O polling
@ 2021-03-02 19:05 Mikulas Patocka
  2021-03-03  2:53 ` [dm-devel] " JeffleXu
  0 siblings, 1 reply; 17+ messages in thread
From: Mikulas Patocka @ 2021-03-02 19:05 UTC (permalink / raw)
  To: JeffleXu, Mike Snitzer, Heinz Mauelshagen, axboe, caspar,
	io-uring, linux-block, joseph.qi, dm-devel, hch
  Cc: Mikulas Patocka

[-- 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 <[email protected]>

---
 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));
 }


^ permalink raw reply	[flat|nested] 17+ messages in thread

end of thread, other threads:[~2021-03-09 11:44 UTC | newest]

Thread overview: 17+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2021-03-02 19:05 [PATCH 4/4] dm: support I/O polling Mikulas Patocka
2021-03-03  2:53 ` [dm-devel] " 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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