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From: majianpeng <majianpeng@gmail.com>
To: axboe <axboe@kernel.dk>, NeilBrown <neilb@suse.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-raid <linux-raid@vger.kernel.org>
Subject: [PATCH 3/3] md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE.
Date: Wed, 30 Oct 2013 10:41:46 +0800	[thread overview]
Message-ID: <2013103010414134402615@gmail.com> (raw)

For R5_ReadNoMerge,it mean this bio can't merge with other bios or
request.It used REQ_FLUSH to achieve this. But REQ_NOMERGE can do the
same work.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
---
 drivers/md/raid5.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index f8b9068..8e0aeaa 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -772,7 +772,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
 				bi->bi_sector = (sh->sector
 						 + rdev->data_offset);
 			if (test_bit(R5_ReadNoMerge, &sh->dev[i].flags))
-				bi->bi_rw |= REQ_FLUSH;
+				bi->bi_rw |= REQ_NOMERGE;
 
 			bi->bi_vcnt = 1;
 			bi->bi_io_vec[0].bv_len = STRIPE_SIZE;
-- 
1.8.4

WARNING: multiple messages have this Message-ID (diff)
From: majianpeng <majianpeng@gmail.com>
To: axboe <axboe@kernel.dk>, NeilBrown <neilb@suse.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linux-raid <linux-raid@vger.kernel.org>
Subject: [PATCH 3/3] md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE.
Date: Wed, 30 Oct 2013 10:41:46 +0800	[thread overview]
Message-ID: <2013103010414134402615@gmail.com> (raw)

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset="us-ascii", Size: 918 bytes --]

For R5_ReadNoMerge,it mean this bio can't merge with other bios or
request.It used REQ_FLUSH to achieve this. But REQ_NOMERGE can do the
same work.

Signed-off-by: Jianpeng Ma <majianpeng@gmail.com>
---
 drivers/md/raid5.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index f8b9068..8e0aeaa 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -772,7 +772,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
 				bi->bi_sector = (sh->sector
 						 + rdev->data_offset);
 			if (test_bit(R5_ReadNoMerge, &sh->dev[i].flags))
-				bi->bi_rw |= REQ_FLUSH;
+				bi->bi_rw |= REQ_NOMERGE;
 
 			bi->bi_vcnt = 1;
 			bi->bi_io_vec[0].bv_len = STRIPE_SIZE;
-- 
1.8.4ÿôèº{.nÇ+‰·Ÿ®‰­†+%ŠËÿ±éݶ\x17¥Šwÿº{.nÇ+‰·¥Š{±þG«éÿŠ{ayº\x1dʇڙë,j\a­¢f£¢·hšïêÿ‘êçz_è®\x03(­éšŽŠÝ¢j"ú\x1a¶^[m§ÿÿ¾\a«þG«éÿ¢¸?™¨è­Ú&£ø§~á¶iO•æ¬z·švØ^\x14\x04\x1a¶^[m§ÿÿÃ\fÿ¶ìÿ¢¸?–I¥

             reply	other threads:[~2013-10-30  2:41 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-30  2:41 majianpeng [this message]
2013-10-30  2:41 ` [PATCH 3/3] md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE majianpeng
2013-10-31  3:10 ` NeilBrown
2013-10-31  5:24   ` kedacomkernel
2013-10-31  5:24     ` kedacomkernel
2013-10-31 14:10   ` axboe

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