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SubjectRe: [PATCH v4 09/12] sched/numa: fix period_slot recalculation
On Tue, Dec 10, 2013 at 05:19:32PM +0800, Wanpeng Li wrote:
> Changelog:
> v3 -> v4:
> * remove period_slot recalculation
>
> The original code is as intended and was meant to scale the difference
> between the NUMA_PERIOD_THRESHOLD and local/remote ratio when adjusting
> the scan period. The period_slot recalculation can be dropped.
>
> Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>

Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>

Thanks,
Naoya

> ---
> kernel/sched/fair.c | 1 -
> 1 files changed, 0 insertions(+), 1 deletions(-)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 7073c76..90b9b88 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -1356,7 +1356,6 @@ static void update_task_scan_period(struct task_struct *p,
> * scanning faster if shared accesses dominate as it may
> * simply bounce migrations uselessly
> */
> - period_slot = DIV_ROUND_UP(diff, NUMA_PERIOD_SLOTS);
> ratio = DIV_ROUND_UP(private * NUMA_PERIOD_SLOTS, (private + shared));
> diff = (diff * ratio) / NUMA_PERIOD_SLOTS;
> }
> --
> 1.7.7.6
>
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