linux-kernel - Re: [PATCH] sched: rewrite the wrong annotation for select_task_rq

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Message-ID: <50738A27.7050007@linux.vnet.ibm.com>
Date:	Tue, 09 Oct 2012 10:21:27 +0800
From:	Michael Wang <wangyun@...ux.vnet.ibm.com>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
CC:	linux-kernel@...r.kernel.org, mingo@...hat.com
Subject: Re: [PATCH] sched: rewrite the wrong annotation for select_task_rq_fair()

On 09/18/2012 04:16 PM, Michael Wang wrote:
> The annotation for select_task_rq_fair() is wrong since commit c88d5910, it's
> actually for a removed function.
> 
> This patch rewrite the wrong annotation to make it correct.

Could I get some comments on the patch?

Regards,
Michael Wang

> 
> Signed-off-by: Michael Wang <wangyun@...ux.vnet.ibm.com>
> ---
>  kernel/sched/fair.c |   14 ++++++++------
>  1 files changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 6b800a1..35eb43a 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -2682,15 +2682,17 @@ done:
>  }
> 
>  /*
> - * sched_balance_self: balance the current task (running on cpu) in domains
> - * that have the 'flag' flag set. In practice, this is SD_BALANCE_FORK and
> - * SD_BALANCE_EXEC.
> + * select_task_rq_fair:
> + *	Select a suitable CPU for task p, in order to keep load balance.
>   *
> - * Balance, ie. select the least loaded group.
> + *	sd_flag:
> + *		the domain we try to balance should have "sd_flag" flag set.
>   *
> - * Returns the target CPU number, or the same CPU if no balancing is needed.
> + *	wake_flags:
> + *		indicate WF_SYNC.
>   *
> - * preempt must be disabled.
> + *	Must hold p->pi_lock and disable irq before invoke.
> + *	Return the CPU number for task p to running on.
>   */
>  static int
>  select_task_rq_fair(struct task_struct *p, int sd_flag, int wake_flags)
> 

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