linux-kernel - Re: [PATCH 0/9] Add MAX_NICE, MIN_NICE and NICE

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Date:	Fri, 14 Feb 2014 17:22:50 +0800
From:	Dongsheng Yang <yangds.fnst@...fujitsu.com>
To:	LKML <linux-kernel@...r.kernel.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH 0/9] Add MAX_NICE, MIN_NICE and NICE_WIDTH macros in prio.h.

Hi Ingo & Peter,
     What's your opinion on this patchset?

On 02/11/2014 03:34 PM, Dongsheng Yang wrote:
> Hi Peter,
> 	There are lots of hardcoding of -20 and 19 in kernel to represent
> minimum and maximum of nice value currently. This patch set define three
> macros in prio.h and replace some of the hardcoding with them.
>
> 	Please help to take a look at it, thanx :)
>
> Dongsheng Yang (9):
>    sched: Prio: Use DEFAULT_PRIO to define NICE_TO_PRIO and PRIO_TO_NICE.
>    sched: prio: Add 3 macros of MAX_NICE, MIN_NICE and NICE_WIDTH in
>      prio.h.
>    sched: prio: Use NICE_WIDTH macro to avoid using of hard coding of 40
>      and 20 in prio.h.
>    sched: prio: Add spaces before and after operator of '-'.
>    rcu: Use MAX_NICE to replace hard coding of 19.
>    sched: Replace hardcoding of -20 and 19 with MIN_NICE and MAX_NICE.
>    sys: Replace hardcoding of -20 and 19 with MIN_NICE and MAX_NICE.
>    workqueue: Replace hardcoding of -20 and 19 with MIN_NICE and
>      MAX_NICE.
>    trace: Replace hardcoding of 19 with MAX_NICE.
>
>   include/linux/sched/prio.h           | 14 +++++++++-----
>   kernel/rcu/torture.c                 |  8 ++++----
>   kernel/sched/auto_group.c            |  2 +-
>   kernel/sched/core.c                  | 12 ++++++------
>   kernel/sys.c                         |  8 ++++----
>   kernel/trace/ring_buffer_benchmark.c |  6 +++---
>   kernel/workqueue.c                   |  2 +-
>   7 files changed, 28 insertions(+), 24 deletions(-)
>

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