From: Michael Wang <wangyun@linux.vnet.ibm.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: linux-kernel@vger.kernel.org, mingo@redhat.com
Subject: Re: [PATCH] sched: rewrite the wrong annotation for select_task_rq_fair()
Date: Tue, 09 Oct 2012 10:21:27 +0800 [thread overview]
Message-ID: <50738A27.7050007@linux.vnet.ibm.com> (raw)
In-Reply-To: <1347956160-6946-1-git-send-email-wangyun@linux.vnet.ibm.com>
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@linux.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)
>
prev parent reply other threads:[~2012-10-09 2:21 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1347956160-6946-1-git-send-email-wangyun@linux.vnet.ibm.com>
2012-09-26 3:43 ` [PATCH] sched: rewrite the wrong annotation for select_task_rq_fair() Michael Wang
2012-10-06 9:04 ` Michael Wang
2012-10-06 9:11 ` Michael Wang
2012-10-09 2:21 ` Michael Wang [this message]
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