linux-kernel - [PATCH 01/21] blkio: Set must_dispatch only if we decided to not dispatch the request

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Message-Id: <1259549968-10369-2-git-send-email-vgoyal@redhat.com>
Date:	Sun, 29 Nov 2009 21:59:08 -0500
From:	Vivek Goyal <vgoyal@...hat.com>
To:	linux-kernel@...r.kernel.org, jens.axboe@...cle.com
Cc:	nauman@...gle.com, dpshah@...gle.com, lizf@...fujitsu.com,
	ryov@...inux.co.jp, fernando@....ntt.co.jp, s-uchida@...jp.nec.com,
	taka@...inux.co.jp, guijianfeng@...fujitsu.com, jmoyer@...hat.com,
	righi.andrea@...il.com, m-ikeda@...jp.nec.com, vgoyal@...hat.com,
	czoccolo@...il.com, Alan.Brunelle@...com
Subject: [PATCH 01/21] blkio: Set must_dispatch only if we decided to not dispatch the request

o must_dispatch flag should be set only if we decided not to run the quue
  dispatch the request.

Signed-off-by: Vivek Goyal <vgoyal@...hat.com>
---
 block/cfq-iosched.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index a5de31f..9adfa48 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2494,9 +2494,9 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
 			if (blk_rq_bytes(rq) > PAGE_CACHE_SIZE ||
 			    cfqd->busy_queues > 1) {
 				del_timer(&cfqd->idle_slice_timer);
-			__blk_run_queue(cfqd->queue);
-			}
-			cfq_mark_cfqq_must_dispatch(cfqq);
+				__blk_run_queue(cfqd->queue);
+			} else
+				cfq_mark_cfqq_must_dispatch(cfqq);
 		}
 	} else if (cfq_should_preempt(cfqd, cfqq, rq)) {
 		/*
-- 
1.6.2.5

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