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Date: Fri, 08 Apr 2011 08:35:53 +0800 From: Shaohua Li <shaohua.li@...el.com> To: Mike Galbraith <efault@....de> Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "mingo@...e.hu" <mingo@...e.hu>, "Yan, Zheng Z" <zheng.z.yan@...el.com> Subject: Re: [PATCH]sched: convert wall-time to vruntime for check_preempt_tick On Thu, 2011-04-07 at 21:34 +0800, Mike Galbraith wrote: > On Thu, 2011-04-07 at 20:43 +0800, Shaohua Li wrote: > > In check_preempt_tick(), delta is vruntime and ideal_runtime is wall runtime. > > Comparing vruntime and ideal_runtime looks buggy. > > Why is that buggy? It's a distance in units ns, ala wakeup_granularity, > a number. This number just happens to be variable. vruntime is scaled wall-time. In all other places we do the scale from my understanding. I'm wondering why not do it here. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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