Message-ID: <5187708A.20103@intel.com>
Date: Mon, 06 May 2013 16:57:46 +0800
From: Alex Shi <alex.shi@intel.com>
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To: Paul Turner <pjt@google.com>
CC: Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Borislav Petkov <bp@alien8.de>, Namhyung Kim <namhyung@kernel.org>,
        Mike Galbraith <efault@gmx.de>,
        Morten Rasmussen <morten.rasmussen@arm.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Preeti U Murthy <preeti@linux.vnet.ibm.com>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        LKML <linux-kernel@vger.kernel.org>, Mel Gorman <mgorman@suse.de>,
        Rik van Riel <riel@redhat.com>,
        Michael Wang <wangyun@linux.vnet.ibm.com>
Subject: Re: [PATCH v5 2/7] sched: remove SMP cover for runnable variables
 in cfs_rq
References: <1367804711-30308-1-git-send-email-alex.shi@intel.com> <1367804711-30308-3-git-send-email-alex.shi@intel.com> <CAPM31R+oBDRF4geM451-ySCtkU1NpqFT_R1mtB95jV-pnLBimQ@mail.gmail.com>
In-Reply-To: <CAPM31R+oBDRF4geM451-ySCtkU1NpqFT_R1mtB95jV-pnLBimQ@mail.gmail.com>
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On 05/06/2013 04:01 PM, Paul Turner wrote:
> On Sun, May 5, 2013 at 6:45 PM, Alex Shi <alex.shi@intel.com> wrote:
>> The following variables were covered under CONFIG_SMP in struct cfs_rq.
>> but similar runnable variables work for UP in struct rq and task_group.
>> like rq->avg, task_group->load_avg.
>> So move them out, they also can work with UP.
> 
> Is there a proposed use-case for UP?  My apologies if I missed it in
> an alternate patch.

> It would seem the only possibly useful thing there would the the
> per-rq average for p-state selection; but we can get that without the
> per-entity values already.


Do you mean to move the rq->avg and task_group->load_avg into CONFIG_SMP?

-- 
Thanks
    Alex
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