From: Namhyung Kim <namhyung@gmail.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH 1/4] cfq-iosched: algebraic simplification in cfq_prio_to_maxrq()
Date: Tue, 24 May 2011 12:18:48 +0900 [thread overview]
Message-ID: <1306207131-2296-1-git-send-email-namhyung@gmail.com> (raw)
Simplify the calculation in cfq_prio_to_maxrq(), plus replace CFQ_PRIO_LISTS to
IOPRIO_BE_NR since they are the same and IOPRIO_BE_NR looks more reasonable in
this context IMHO.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
---
block/cfq-iosched.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index ab7a9e6a9b1c..151a050e692c 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2029,7 +2029,7 @@ cfq_prio_to_maxrq(struct cfq_data *cfqd, struct cfq_queue *cfqq)
WARN_ON(cfqq->ioprio >= IOPRIO_BE_NR);
- return 2 * (base_rq + base_rq * (CFQ_PRIO_LISTS - 1 - cfqq->ioprio));
+ return 2 * base_rq * (IOPRIO_BE_NR - cfqq->ioprio);
}
/*
--
1.7.5.2
next reply other threads:[~2011-05-24 3:19 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-24 3:18 Namhyung Kim [this message]
2011-05-24 3:18 ` [PATCH 2/4] cfq-iosched: reduce bit operations in cfq_choose_req() Namhyung Kim
2011-05-24 17:34 ` Justin TerAvest
2011-05-25 2:34 ` Namhyung Kim
2011-05-24 3:18 ` [PATCH 3/4] cfq-iosched: remove unused 'group_changed' in cfq_service_tree_add() Namhyung Kim
2011-05-24 17:32 ` Justin TerAvest
2011-05-24 3:18 ` [PATCH 4/4] cfq-iosched: free cic_index if cfqd allocation fails Namhyung Kim
2011-05-24 8:13 ` [PATCH 1/4] cfq-iosched: algebraic simplification in cfq_prio_to_maxrq() Jens Axboe
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