linux-kernel - [PATCH] Allow 0ms deadline latency

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Message-ID: <50C4B5D7.4030808@intel.com>
Date:	Mon, 10 Dec 2012 00:01:27 +0800
From:	xtu4 <xiaobing.tu@...el.com>
To:	linux-kernel@...r.kernel.org, 'axboe@...nel.dk',
	di.zhang@...el.com, xtu4 <xiaobing.tu@...el.com>
Subject: [PATCH] Allow 0ms deadline latency

Subject: [PATCH] Allow 0ms deadline latency, increase the read speed

Signed-off-by: xiaobing tu <xiaobing.tu@...el.com>
---
block/deadline-iosched.c |    2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index c644137..e502d6b 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -230,7 +230,7 @@ static inline int deadline_check_fifo(struct 
deadline_data *dd, int ddir)
        /*
         * rq is expired!
         */
-       if (time_after(jiffies, rq_fifo_time(rq)))
+       if (time_after_eq(jiffies, rq_fifo_time(rq)))
                return 1;

         return 0;
-- 
1.7.6

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