From: Jens Axboe <axboe@kernel.dk>
To: xtu4 <xiaobing.tu@intel.com>
Cc: linux-kernel@vger.kernel.org, di.zhang@intel.com
Subject: Re: [PATCH] Allow 0ms deadline latency
Date: Sun, 09 Dec 2012 19:18:53 +0100 [thread overview]
Message-ID: <50C4D60D.4090201@kernel.dk> (raw)
In-Reply-To: <50C4B62C.7050404@intel.com>
On 2012-12-09 17:02, xtu4 wrote:
> On 12/10/2012 12:01 AM, xtu4 wrote:
>> Subject: [PATCH] Allow 0ms deadline latency, increase the read speed
>>
>> Signed-off-by: xiaobing tu <xiaobing.tu@intel.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;
Looks fine, it allows FIFO behaviour for deadline as well. I have
applied it.
--
Jens Axboe
prev parent reply other threads:[~2012-12-09 18:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-09 16:01 [PATCH] Allow 0ms deadline latency xtu4
2012-12-09 16:02 ` xtu4
2012-12-09 18:18 ` Jens Axboe [this message]
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