linux-kernel - Re: [patch] CFS scheduler, -v18

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Message-ID: <19f34abd0707020940r517cbe42sa443d191439e5f54@mail.gmail.com>
Date:	Mon, 2 Jul 2007 18:40:03 +0200
From:	"Vegard Nossum" <vegard.nossum@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Dmitry Adamushko" <dmitry.adamushko@...il.com>,
	"Linux Kernel" <linux-kernel@...r.kernel.org>
Subject: Re: [patch] CFS scheduler, -v18

On 7/2/07, Ingo Molnar <mingo@...e.hu> wrote:
> thx. As an initial matter, could you double-check whether your v18
> kernel source has the patch below applied already?
>
>         Ingo
>
> Index: linux/kernel/sched_fair.c
> ===================================================================
> --- linux.orig/kernel/sched_fair.c
> +++ linux/kernel/sched_fair.c
> @@ -342,8 +342,9 @@ update_stats_enqueue(struct cfs_rq *cfs_
>                 s64 tmp;
>
>                 if (se->wait_runtime < 0) {
> -                       tmp = (0 - se->wait_runtime) << NICE_0_SHIFT;
> -                       key += (tmp * se->load.inv_weight) >> WMULT_SHIFT;
> +                       tmp = -se->wait_runtime;
> +                       key += (tmp * se->load.inv_weight) >>
> +                                       (WMULT_SHIFT - NICE_0_SHIFT);
>                 } else {
>                         tmp = se->wait_runtime * se->load.weight;
>                         key -= tmp >> NICE_0_SHIFT;
>
>

It does.

Vegard
-
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